HUAWEI R250D E Wireless Access Point Hardware Installation and Maintenance Guide
বিজ্ঞাপন
বিজ্ঞাপন
R250D-E
Hardware Installation and
Maintenance Guide
Issue
Date
01
2016-09-30
HUAWEI TECHNOLOGIES CO., LTD.
Copyright © Huawei Technologies Co., Ltd. 2016. All rights reserved.
No part of this document may be reproduced or transmitted in any form or by any means without prior written consent of Huawei Technologies Co., Ltd.
Trademarks and Permissions
and other Huawei trademarks are trademarks of Huawei Technologies Co., Ltd.
All other trademarks and trade names mentioned in this document are the property of their respective holders.
Notice
The purchased products, services and features are stipulated by the contract made between Huawei and the customer. All or part of the products, services and features described in this document may not be within the purchase scope or the usage scope. Unless otherwise specified in the contract, all statements, information, and recommendations in this document are provided "AS IS" without warranties, guarantees or representations of any kind, either express or implied.
The information in this document is subject to change without notice. Every effort has been made in the preparation of this document to ensure accuracy of the contents, but all statements, information, and recommendations in this document do not constitute a warranty of any kind, express or implied.
Huawei Technologies Co., Ltd.
Address:
Website:
Email:
Huawei Industrial Base
Bantian, Longgang
Shenzhen 518129
People's Republic of China http://www.huawei.com
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R250D-E
Hardware Installation and Maintenance Guide About This Document
About This Document
Intended Audience
This document describes hardware features of the R250D-E and provides basic installation methods.
This document is intended for: l Network planning engineers l Hardware installation engineers l Commissioning engineers l Onsite maintenance engineers l System maintenance engineers
Symbol Conventions
The symbols that may be found in this document are defined as follows.
Symbol Description
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Indicates a potentially hazardous situation which, if not avoided, may result in minor or moderate injury.
Indicates a potentially hazardous situation which, if not avoided, could result in equipment damage, data loss, performance deterioration, or unanticipated results.
NOTICE is used to address practices not related to personal injury.
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R250D-E
Hardware Installation and Maintenance Guide
Symbol
NOTE
About This Document
Description
Calls attention to important information, best practices and tips.
NOTE is used to address information not related to personal injury, equipment damage, and environment deterioration.
Change History
Changes between document issues are cumulative. The latest document issue contains all changes made in previous issues.
Issue 01 (2016-09-30)
Initial commercial release
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R250D-E
Hardware Installation and Maintenance Guide Contents
Contents
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R250D-E
Hardware Installation and Maintenance Guide Contents
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1 Product Overview
R250D-E
Hardware Installation and Maintenance Guide
1
Product Overview
About This Chapter
The R250D-E in Huawei Agile Distributed Wi-Fi Solution is applicable to scenarios with high-density rooms and complex wall structures, such as schools, hotels, hospitals, and office meeting rooms. Huawei R250D-E uses an 86 mm plate in compliance with international standards and can be easily installed into an 86–type box in a room. It is equipped with a built-in antenna and a hidden indicator; therefore, installation of the R250D-E does not affect indoor decorations or designs. It also has an IEEE 802.11a/b/g/n/ac/ac Wave 2 wireless module and can work on both 5 GHz and 2.4 GHz frequency bands. It supports PoE power supply, and can be directly connected to a central AP and deployed in a room. The central AP and the R250D-E are connected through network cables, which greatly extends the coverage range, enhances flexibility in AP deployment and planning, and reduces the engineering construction costs.
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R250D-E
Hardware Installation and Maintenance Guide
1.1 Device Structure
Figure 1-1 shows the appearance of the R250D-E.
Figure 1-1 Appearance of the R250D-E
Pass Through GE0/PoE_IN
1 Product Overview
1 2 3 4 5 6 7
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Table 1-1 describes ports on the R250D-E.
Table 1-1 Interface description
No.
Name Description
1 DC 48V DC power socket: connects a 48 V power adapter to the device.
2 USB Connects to a USB flash drive or other storage devices to extend the storage space of the device. The USB2.0
standard is supported.
3
4
5
6
7
Default Reset button: restores factory settings and restarts the device if you hold down the button more than 3 seconds.
Pass Through Pass Through port: connects to a network cable or phone cable for transparent transmission.
GE2 to GE4 10/100/1000M port: connects to the wired Ethernet.
GE1/
PoE_OUT
10/100/1000M port: connects to the wired Ethernet and supports PoE output.
GE0/PoE_IN 10/100/1000M port: connects to the wired Ethernet and supports PoE input.
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R250D-E
Hardware Installation and Maintenance Guide 1 Product Overview
NOTE l The R250D-E supports the following power supply modes: PoE power supply and DC power supply.
l When the device uses the DC power supply, use a power adapter for power supply; otherwise, the device may be damaged.
1.2 Indicator Description
LED Indicator
The R250D-E provides only a single indicator, as shown in Figure 1-2 .
Figure 1-2 Indicator
Indicator
GE1/PoE_OUT GE2 GE3 GE4 Pass Through
NOTE l The indicator is located inside the panel, which turns on after the AP is powered on.
l Indicator colors may vary slightly at different temperature.
Table 1-2 Indicator description
Type Color
Default status after power-on
Green
Status
Steady on
Description
The AP is just powered on and the software is not started yet.
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Type
Software startup status
Running status
Alarm
Color
Green
Green
Green
1 Product Overview
Status
Steady on after blinking once
Blinking once every
2s (0.5 Hz)
Blinking once every
5s (0.2 Hz)
Blinking once
Alarm Green every
0.25s (4 Hz)
Description
After the system is reset and starts uploading the software, the indicator blinks green once. Until the software is uploaded and started, the indicator remains steady green.
The system is running properly, the
Ethernet connection is normal, and STAs are associated with the AP.
The system is running properly, the
Ethernet connection is normal, and no
STA is associated with the AP. The system is in low power consumption state.
l The software is being upgraded.
l After the software is uploaded and started, the AP working in Fit
AP mode requests to go online on the AC and maintains this state until it goes online successfully on the AC (before the CAPWAP link is established).
l The AP registration fails
(the CAPWAP link is disconnected).
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Hardware Installation and Maintenance Guide
Type
Fault
Color
Red
Status
Steady on
1 Product Overview
Description
A fault that affects services has occurred, such as a
DRAM detection failure or system software loading failure. The fault cannot be automatically rectified and must be rectified manually.
1.3 Basic Specifications
Table 1-3 provides basic specifications of the R250D-E.
Table 1-3 Basic specifications
Item
Physical specifications
Power specifications
Dimensions (H x
W x D)
Weight
Description
36mm x 86mm x 140mm
0.26kg
System memory l 256MB DDR3L l 32MB FLASH
Power input l DC:48V±5% l PoE power supply: in compliance with IEEE
802.3af/at
Maximum power consumption
Environment specifications
Operating temperature
11.5 W (excluding the output power of the USB port and PoE_OUT port)
NOTE
The actual maximum power consumption depends on local laws and regulations.
l -60 m to +1800 m: 0°C to +40°C l 1800 m to 5000 m: Temperature decreases by 1°C every time the altitude increases 300 m.
-40°C to +70°C Storage temperature
Operating humidity
IP rating
5% to 95% (non-condensing)
IP20
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R250D-E
Hardware Installation and Maintenance Guide 1 Product Overview
Item
Atmospheric pressure
Description
53 kPa to 106 kPa
1.4 Ordering Information
To place an order, contact technical support personnel.
Part Number
50082922
Description
R250D-E Mainframe(11ac,2x2 Double
Frequency,Built-in Antenna)
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2 AP Installation
R250D-E
Hardware Installation and Maintenance Guide
About This Chapter
2.1 Preparing for Installation
2.4 Determining the Installation Position
2.7 Checking the Device After Installation
2
AP Installation
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R250D-E
Hardware Installation and Maintenance Guide 2 AP Installation
2.1 Preparing for Installation
This section describes safety precautions and tool preparations for AP installation.
Safety Precautions
l Take proper measures to prevent injuries and device damage.
l Place the device in a dry and flat position away from any liquid and prevent the device from slipping.
l Keep the device clean.
l Do not put the device and tools in the aisles.
CAUTION
Only the qualified personnel are permitted to install and remove the device and its accessories. Before installation and operation, read the safety precautions carefully.
Tool Preparation
To install APs, prepare tools listed in Table 2-1
.
Table 2-1 Tools
Phillips screwdriver Protective gloves ESD gloves
Slip-proof glove Marker Hammer drill
Claw hammer Diagonal pliers Wire stripper
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Hardware Installation and Maintenance Guide
RJ45 crimping tool Cable cutter
2 AP Installation
Network cable tester
Multimeter Ladder Safety helmet
Safety belt Anti-skid shoes
2.2 Installation Flowchart
The following figure shows the process for installing an AP.
-
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Hardware Installation and Maintenance Guide
Figure 2-1 Installation flowchart
2 AP Installation
2.3 Unpacking the Equipment
Before unpacking the carton, ensure that the packing carton is intact and not damaged or soaked. Stop unpacking if the equipment is rusted or soggy. Then, investigate causes and contact the supplier.
After unpacking, check items in the carton against the packing list. If any item is missing, contact the supplier or agent.
Usually, the packing list contains the following items.
l Remote Unit l Screws l Quick Start Guide l Warranty card l MAC address label l SN label
NOTE
If a PoE adapter or a DC power adapter is required, you need to purchase it separately.
2.4 Determining the Installation Position
l Do not deploy the device in places with high temperature, dust, noxious gas, unstable voltage, much vibrations, or strong noise, or in places near flammable or explosive materials and interference sources such as a large radar station, radio station, and transformer station.
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Hardware Installation and Maintenance Guide 2 AP Installation l Install the device in a site that is free from leaking or dripping water, heavy dew, and humidity, and take protective measures to prevent water from flowing into the equipment along the cable.
l Place the AP far away from electronic devices that may produce radio interference, such as microwave ovens, antennas, and other radio communication devices. For details, see
.
l Install the device in hidden places and ensure that the device does not disturb daily work and life of residents.
l Make the engineering design by fully considering such factors as hydrology, geology, earthquake, electric power, and traffic. The selected site should comply with the environment design specifications of communications equipment.
Table 2-2 General anti-interference requirements
Scenario Deployment Distance Requirement
Indoor installation l There should be at least a 7 m distance between antennas.
l The antennas should be placed at least 2 m from the 4G antennas of the carrier.
l The antennas should be placed far away from electronic devices that may produce interference, such as microwave ovens.
NOTE
If antennas are embedded into APs, the deployment distance requirements on the antennas are those on APs.
2.5 Installing the Device
NOTE
Remove the protective film on the surface before installation to prevent electrostatic discharge.
2.5.1 Installing the Device into an 86-Type Box
Installing the device in an 86-type box requires expansion screws delivered with the device.
The procedure is as follows:
1.
Use a screwdriver to remove the 86-type panel from the wall (skip this step if no 86-type panel is installed on the wall).
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Hardware Installation and Maintenance Guide 2 AP Installation
2.
Insert a network cable into the GE0/PoE_IN port and a phone cable into the Pass
Through port.
Pass Through
GE1/PoE_OUT
3.
Connect the cables. For details, see 2.6 Cable Connection
.
4.
Open the front cover of the device, align screws on both sides with the screw holes in the
86-type box, and use the Phillips screwdriver to tighten the two screws.
M4
1N•m
GE1/PoE_OUT
GE2
GE3
GE4
Pass Through
5.
Close the cover. If torx security screws are used to prevent theft, use a T9 torx security screwdriver to tighten the torx security screws into the device.
GE1/PoE_OUT
GE2
GE3
GE4
Pass Through
ST2.5
0.16N•m
GE1/PoE_OUT
GE2
GE3
GE4
Pass Through
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NOTE
You need to separately prepare the T9 torx security screwdriver.
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2.5.2 Installing the Device on a Desk
2 AP Installation
Installing an AP on a desk requires a desktop stand. The procedures are as follows:
1.
Connect the cables. For details, see 2.6 Cable Connection
.
2.
Align the top of the desktop stand with the grooves on the bottom cover of the AP. Slide the AP along the rail until the stand reaches the end of the grooves. Place the stand with the AP on the desk steadily.
NOTE
You need to separately purchase a desktop stand.
2.6 Cable Connection
Table 2-3 describes the cable connections.
Figure 2-2 Appearance of the R250D-E
Pass Through GE0/PoE_IN
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1 2 3 4 5
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Hardware Installation and Maintenance Guide 2 AP Installation
Table 2-3 Cable connections
No.
1
Cable or Device Description
DC power adapter When the device uses the DC power supply, use a power adapter for power supply; otherwise, the device may be damaged.
2 USB cable
3
4
5
Phone cable or
Network cable
Network cable
Network cable
Connects to a USB flash drive or other storage devices to extend the storage space of the device. The USB port supports the USB 2.0 standard and a maximum output power of 2.5 W.
The cable is inserted into a Pass Through port for transparent transmission.
l Connects to STAs through downlink network ports.
l CAT5e cables or higher must be used.
l The length of a network cable cannot exceed 100 m.
However, when the GE1/PoE_OUT port is used for
PoE output, the network cable inserted in this port cannot be longer than 20 m.
l The GE1/PoE_OUT port supports PoE output and provides a maximum of 10 W power output.
NOTICE l The GE1/PoE_OUT port complies with the category detection mechanism of 802.3af.
l Do not insert a PoE input cable into the GE1/PoE_OUT port.
l Connects to the Ethernet port of an upper-layer PSE through the uplink network port.
l The GE0/PoE_IN port supports PoE input.
l CAT5e cables or higher must be used.
l The length of a network cable cannot exceed 100 m.
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NOTE l If the R250D-E needs to connect to the Ethernet, ensure that the Ethernet cable is working properly.
If the Ethernet cable is not working properly, the R250D-E may fail to be powered on or fail to work. Before connecting an Ethernet cable to the R250D-E, use the cable test tool to check whether the cable is qualified. If the cable is unqualified, replace it.
l The R250D-E is powered by either the DC power supply or PoE power supply.
l When the R250D-E works in 802.3af power supply mode, the USB port and PoE_OUT port have no power output; when it works in 802.3at or DC power supply mode, the USB port and PoE_OUT port have power output.
Pay attention to the following points when bundling the cables: l Different types of cables must be separately routed with the minimum spacing of 30 mm and cannot be entangled or crossed. Cables should be parallel or separated using dedicated separators.
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Hardware Installation and Maintenance Guide 2 AP Installation l Bundled cables are closely arranged, straight, tidy, and undamaged.
l Cable ties are bound neatly facing the same direction, and those at the same horizontal line must be in a straight line. Cable tie tails should be cut smoothly and evenly.
l Labels or nameplates must be attached to the cables after they are installed.
2.7 Checking the Device After Installation
Table 2-4 shows the items to be checked after installation is complete. For more details, see
Installation Checklist in the appendix.
Table 2-4 Installation checklist
No.
Check Item
1 The device is installed by strictly following the design draft. The installation position meets space requirements, with maintenance space reserved.
2
3
The device is securely installed.
The power cables are intact and not spliced.
4
5
6
7
8
Terminals of the power cables are welded or cramped firmly.
All power cables are not short-circuited or reversely connected and must be intact with no damage.
The power cables and ground cables are separated from other cables and bundled separately.
Connectors of signal cables are complete, intact, and tightly connected.
The signal cables are not damaged or broken.
Labels on cables are clear and correct.
2.8 Powering on the Device
After the device is powered on, observe indicator on the device to determine the system
running status. For details, see 1.2 Indicator Description .
NOTE
Do not frequently power on and off the device.
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3 Logging In to the Device
R250D-E
Hardware Installation and Maintenance Guide
3
Logging In to the Device
About This Chapter
3.1 Logging In to the Device Using STelnet/Telnet
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R250D-E
Hardware Installation and Maintenance Guide 3 Logging In to the Device
3.1 Logging In to the Device Using STelnet/Telnet
You can log in to the device using STelnet V2 or Telnet to configure, manage, and maintain the device in the CLI.
NOTE l By default, only the STelnet V2 service is enabled on the device.
l Telnet has security vulnerabilities. You are not advised to enable the Telnet service.
Before logging in to the device, complete the following tasks: l Power on the device.
l Prepare network cables used to connect device interfaces.
The following table lists the default configuration of the device. You are advised to change the default user name and password on your first login.
Table 3-1 Default configuration of the device
Parameter
User name
Password
IP address
Subnet mask
Default Setting admin [email protected]
169.254.1.1
255.255.0.0
NOTE
If the device is already online on the AC, you can remotely log in to the AC on a local terminal and run the display ap all command to check the IP address of the device.
The following example uses the default parameters and is used for reference only.
Step 1 Use network cables and a LAN switch to connect the PC to the network interface of the device.
Step 2 Assign the PC with an IP address on the same network segment as the default IP address of the device so that the PC and device are reachable to each other.
If the device uses the default settings, the IP address of the PC must be in the network segment 169.254.0.0/16 but cannot be 169.254.1.1. 169.254.1.100 is recommended.
Step 3 Start the CLI on the PC and access the IP address 169.254.1.1
of the device using STelnet V2.
Step 4 Enter the user name and password as prompted to log in to the user interface.
----End
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4 Hardware Failures
R250D-E
Hardware Installation and Maintenance Guide
4
Hardware Failures
About This Chapter
This section describes common methods for troubleshooting typical hardware faults.
4.1 A Device Fails to Be Powered On
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Hardware Installation and Maintenance Guide 4 Hardware Failures
4.1 A Device Fails to Be Powered On
Fault Description
The SYS indicator of a device is off.
Possible Causes
Power Supply Mode
Power supply using a power module
PoE power supply
Possible Cause l The device is powered off.
l The power cable is not securely connected to the device.
l The power supply unit has failed.
– If the device connects to an external power source, its power adapter may fail.
– If the device has a built-in power supply, the device itself may be faulty.
l The power sourcing equipment does not support the PoE function or is faulty.
l The power sourcing equipment is incorrectly configured (the PoE function is disabled or the power-off time range is improperly set).
l The line is faulty (the network cable or distribution frame is damaged).
l The device is faulty.
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Hardware Installation and Maintenance Guide
Troubleshooting Procedure
Power Supply Mode
Power supply using a power module
PoE power supply
4 Hardware Failures
Troubleshooting Procedure
1. Check whether the device is powered off.
2. Check that the power cable is securely connected to the device.
3. Check whether the power supply is normal.
Replace the power adapter with a normal one. If the device is powered on, the original power adapter is faulty. Contact technical support personnel or Huawei agent and ask them to replace the power adapter.
4. If the device still cannot be powered on, the device itself is faulty. Contact technical support personnel or Huawei agent and ask them to replace the device.
1. Check whether the power sourcing equipment supports PoE or is faulty.
2. Check whether the configuration on the power sourcing equipment causes PoE power supply errors, such as the PoE function is disabled or the power-off time range is incorrectly set.
3. Check whether the network cable or distribution frame is faulty.
4. If the device still cannot be powered on, the device itself is faulty. Contact technical support personnel or Huawei agent and ask them to replace the device.
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5 Appendix
R250D-E
Hardware Installation and Maintenance Guide
About This Chapter
5.1 On-site Cable Assembly and Installation
5.2 Environmental Requirements for Device Operation
5.3 Equipment Grounding Specifications
5.4 Engineering Labels for Cables
5.5 Guide to Using Optical Modules
5
Appendix
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Hardware Installation and Maintenance Guide 5 Appendix
5.1 On-site Cable Assembly and Installation
5.1.1 Cable Assembly Precautions
Checking the Appearance of Cables
l If the cable jacket or insulation is visibly dirty, clean it before assembly.
l If the jacket or insulation of a cable has visible damage, irreparable scuffing, or other defects, do not use the cable.
l If the shield layer of a cable is damaged, do not use the cable.
l If the cable jacket or insulation cracks after the cable is bent or twisted, discard this cable and check whether other cables have the same problem. If other cables have the same problem, replace these cables.
Checking the Appearance of Connectors
l Do not use connectors with visible defects, damage, rust or scuffing.
l Do not use connectors if their shells or pins have exposed part or uneven plating, or their pins are lost, broken, or bent.
l Do not use connectors that have dirt on their pins or in their jacks or if there are conductors between pins or between pins and the shell.
Precautions for Assembly
l Use dedicated tools or tools delivered by Huawei and follow the methods given here during assembly.
l Hold terminals of cables instead of pulling the cables themselves when installing or removing cable components.
l Take the following precautions when cutting or stripping cables:
– Make cables slightly longer than necessary.
– Coil cables longer than 2 m (6.56 ft) after cutting. Bind and fasten the coils using bundling ropes. The inner diameters of the coils should be larger than 20 times the outer diameters of the cables.
– When stripping the jackets of cables, avoid damaging the shield layers (braid or aluminum foil), insulation, core conductors, and other jackets that do not need to be stripped.
– After assembling cables, cut all visible cross sections of jackets to ensure that the cross sections are arranged neatly.
– Do not touch the core conductors of cables with your hands. Terminate exposed conductors in a timely way after stripping off insulation so that the surface of the conductors does not become oxidized.
l Take the following precautions when crimping and connecting cables or connectors:
– The terminals and conductors should be connected tightly after they are crimped.
They should not be moved or turned.
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Hardware Installation and Maintenance Guide 5 Appendix
– Cut all the exposed copper wires.
– Try to avoid a second crimping of sleeves.
– Keep all the conductors clean and aligned.
NOTE
The connectors, cables, and tools provided by different vendors may be different. The figures in this document are for your reference only.
5.1.2 Assembling Power Cables
Assembling the OT Terminal and Power Cable
Context
Figure 5-1 shows the components of an OT terminal and a power cable.
Figure 5-1 Components of an OT terminal and a power cable
A. Heat-shrinkable tubing B. Bare crimping terminal C. Insulation D. Conductor
Procedure
Step 1 Based on the cross-sectional area of the cable conductor, strip a length of insulation coating C to expose the conductor D of length L1, as shown in
. The recommended values of
.
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Hardware Installation and Maintenance Guide
Figure 5-2 Stripping a power cable (OT terminal)
5 Appendix
NOTICE l When you strip a power cable, do not damage the conductor of the cable.
l If the bare crimping terminal is not provided by Huawei, the value of L1 is 1 mm (0.04 in.) to 2 mm (0.08 in.) greater than the value of L.
Table 5-1 Mapping between the cross-sectional area of the conductor and the value of L1
Cross-
Sectional
Area of
Conductor
(mm 2 (in.
2 ))
1 (0.002)
1.5 (0.002)
2.5 (0.004)
4 (0.006)
6 (0.009)
Value of L1
(mm(in.))
7 (0.28)
7 (0.28)
7 (0.28)
8 (0.31)
9 (0.35)
Cross-Sectional
Area of Conductor
(mm 2 (in.
2 ))
10 (0.015)
16 (0.025)
25 (0.039)
35 (0.054)
50 (0.077)
Value of L1
(mm(in.))
11 (0.43)
13 (0.51)
14 (0.55)
16 (0.63)
16 (0.63)
NOTE
If you are proficient in assembling OT terminals and power cables, you can obtain the value of L1 by comparing the part to be crimped with the power cable.
Step 2
Put the heat-shrinkable (A) tubing onto the bare crimping terminal, as shown in Figure 5-3 .
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Figure 5-3 Putting the heat shrink tubing onto the bare crimping terminal
5 Appendix
Step 3 Put the OT terminal B onto the exposed conductor, and ensure that the OT terminal is in good
contact with the insulation coating C, as shown in Figure 5-3
.
NOTICE
After the conductor is fed into the OT terminal, the protruding part of the conductor, or L2 in
Figure 5-3 , must not be longer than 2 mm (0.08 in.).
Step 4
Crimp the joint parts of the bare crimping terminal and the conductor, as shown in Figure 5-4
.
NOTE
The shapes of crimped parts may vary with the crimping dies.
Figure 5-4 Crimping the joint parts of the bare crimping terminal and the conductor (OT terminal)
Step 5 Push the heat shrink tubing (A) toward the connector until the tube covers the crimped part, and then use a heat gun to heat the tube, as shown in
.
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Figure 5-5 Heating the heat shrink tubing (OT terminal)
5 Appendix
NOTICE
Stop heating the shrink tubing when the connector is securely locked in the shrink tubing. Do not heat the shrink tubing too long as this may damage the insulation coating.
----End
Assembling the JG Terminal and Power Cable
Context
Figure 5-6 shows the components of a JG terminal and a power cable.
Figure 5-6 Components of a JG terminal and a power cable
Issue 01 (2016-09-30)
A. JG terminal B. Heat-shrinkable tubing C. Insulation layer of a power cable
D. Conductor of a power cable
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Procedure
Step 1 Strip a part of the insulation to expose the cable conductor with a length of L, as shown in
Figure 5-7 . The recommended values of L are listed in Table 5-2
.
NOTICE l When you strip a power cable, do not damage the conductor of the cable.
l If the bare crimping terminal is not provided by Huawei, you can adjust the value of L as required.
Figure 5-7 Stripping a power cable (JG terminal)
Table 5-2 Mapping between the cross-sectional area of the conductor and the value of L
Cross-Sectional Area of Conductor
(mm 2 (in.
2 ))
Value of L (mm(in.))
16 (0.025) 13 (0.51)
25 (0.039)
35 (0.054)
14 (0.55)
16 (0.63)
50 (0.077) 16 (0.63)
Step 2
Put the heat shrink tubing onto the bare crimping terminal, as shown in Figure 5-8
.
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Figure 5-8 Putting the heat shrink tubing onto the bare crimping terminal
5 Appendix
Step 3 Put the bare crimping terminal onto the exposed conductor, and ensure that the bare crimping terminal is in good contact with the insulation of the power cable, as shown in
Step 4
Crimp the joint parts of the bare crimping terminal and the conductor, as shown in Figure 5-9
.
Figure 5-9 Crimping the joint parts of the bare crimping terminal and the conductor (JG terminal)
Step 5 Push the heat shrink tubing toward the connector until the tube covers the crimped part, and
then use a heat gun to heat the tube, as shown in Figure 5-10
.
Figure 5-10 Heating the heat shrink tubing (JG terminal)
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----End
Assembling the Cord End Terminal and the Power Cable
Context
Figure 5-11 shows the components of a cord end terminal and a power cable.
Figure 5-11 Components of a cord end terminal and a power cable
5 Appendix
A. Cord end terminal B. Insulation layer of a power cable C. Conductor of a power cable
Procedure
Step 1 Strip a part of the insulation to expose the cable conductor with a length of L1, as shown in
Figure 5-12 . The recommended values of L1 are listed in
.
NOTICE
When you strip a power cable, do not damage the conductor of the cable.
Figure 5-12 Stripping a power cable (cord end terminal)
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Table 5-3 Mapping between the cross-sectional area of the conductor and the value of L1
Cross-
Sectional
Area of
Conductor
(mm 2 (in.
2 ))
Value of L1
(mm(in.))
Cross-Sectional
Area of Conductor
(mm 2 (in.
2 ))
Value of L1
(mm(in.))
1 (0.002)
1.5 (0.002)
8 (0.31)
10 (0.39)
10 (0.015)
16 (0.025)
15 (0.59)
15 (0.59)
2.5 (0.004)
4 (0.006)
10 (0.39)
12 (0.47)
25 (0.039)
35 (0.054)
18 (0.71)
19 (0.75)
6 (0.009) 14 (0.55) 50 (0.077) 26 (1.02)
Step 2 Put the cord end terminal onto the conductor, and ensure that the conductor is aligned with the edge of the cord end terminal, as shown in
NOTICE
After the conductor is fed into the cord end terminal, the protruding part of the conductor must not be longer than 1 mm (0.04 in.).
Figure 5-13 Putting the cord end terminal onto the conductor
Step 3
Crimp the joint parts of the cord end terminal and the conductor, as shown in Figure 5-14
.
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Figure 5-14 Crimping the cord end terminal and the conductor
5 Appendix
Step 4 Check the maximum width of the tubular crimped terminal. The maximum width of a tubular
crimped terminal is listed in Table 5-4
.
Table 5-4 Maximum width of a tubular crimped terminal
Cross-Sectional Area of Tubular
Terminal (mm 2 (in.
2 ))
Maximum Width of Crimped Terminal
W1 (mm(in.))
0.25 (0.0004) 1 (0.04)
0.5 (0.0008)
1.0 (0.0015)
1 (0.04)
1.5 (0.06)
1.5 (0.0023)
2.5 (0.0039)
4 (0.006)
6 (0.009)
1.5 (0.06)
2.4 (0.09)
3.1 (0.12)
4 (0.16)
10 (0.015)
16 (0.025)
25 (0.039)
35 (0.054)
5.3 (0.21)
6 (0.24)
8.7 (0.34)
10 (0.39)
----End
5.1.3 Assembling Ethernet Cables
Assembling the Shielded RJ45 Connector and Ethernet Cable
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Context
5 Appendix
Figure 5-15 shows the components of an RJ45 connector and a shielded Ethernet cable.
Figure 5-15 Shielded RJ45 connector and cable
A. Jacket of connector B. Metal shell of connector
E. Jacket of Ethernet cable F. Shield layer of Ethernet cable
C. Wire holder of connector
G. Twisted-pair wires -
D. Plug of connector
Procedure
Step 1 Fit the jacket of the connector onto the Ethernet cable, as shown in
Figure 5-16 Fitting the jacket of the connector onto the Ethernet cable
Step 2 Remove a 30 mm (1.18 in.) long section of the jacket, cut off the nylon twine inside the
jacket, and cut a no more than 5 mm (0.20 in.) cleft in the jacket, as shown in Figure 5-17
.
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NOTICE l When you remove a section of the jacket, do not damage the shield layer of the twistedpair cable.
l When you remove the shield layer, do not damage the insulation of the twisted-pair cable.
Figure 5-17 Removing the jacket of a twisted-pair cable (unit: mm (in.))
Step 3 Fit the metal shell onto the twisted-pair cable. The shield layer is covered by the metal shell, as shown in
.
Figure 5-18 Fitting the metal shell onto the twisted-pair cable
Step 4 Fit the metal shell onto the twisted-pair cable until the shield layer is covered completely.
Along the edge of the metal shell, cut off the aluminum foil shield layer and ensure that there is no surplus copper wire. The exposed twisted-pair cable is about 20 mm (0.79 in.) long, as shown in
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Figure 5-19 Removing the shield layer of a twisted-pair cable (unit: mm (in.))
5 Appendix
Step 5
Lead the four pairs of twisted-pair wires through the wire holder, as shown in Figure 5-20
and
Figure 5-21 . Ensure that the colored wires are in the correct location in the cable.
Figure 5-20 Leading wires through the wire holder
G
C
Figure 5-21 Cable locations in a wire holder
White-Green
Green
White-Orange
Orange
Blue
White-Blue
White-Brown
Brown
Step 6 Align the four pairs of cables in the holder, as shown in
between the wires and the pins are shown in
Figure 5-23 and listed in Table 5-5 .
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Figure 5-22 Four pairs of cables on a wire holder
5 Appendix
Figure 5-23 Connections between wires and pins
White-Orange
Orange
White-Green
Blue
White-Blue
Green
White -Brown
Brown
Pin 8
Pin 1
Issue 01 (2016-09-30)
5
6
3
4
7
Table 5-5 Connections between wires and pins (using a straight-through cable as an example)
Matching Pins of Wires Wire Color
1
2
White-Orange
Orange
White-Green
Blue
White-Blue
Green
White-Brown
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Matching Pins of Wires
8
Wire Color
Brown
Step 7 Cut off the surplus cables along the lower edge of the wire holder, as shown in
Figure 5-24 Cutting off surplus cables
Step 8 Put the connector body onto the wire holder and turn the metal shell by 90°, as shown in
NOTE
Ensure that the wire holder is in good contact with the connector body.
Figure 5-25 Putting the connector body onto the wire holder
Step 9 Push the metal shell toward the connector body until the wire holder and the connector body
are engaged completely. Crimp the connector, as shown in Figure 5-26
.
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Figure 5-26 Crimping the connector
5 Appendix
Step 10 Push the jacket towards the metal shell until the metal shell is covered. This completes the
assembly of one end of the cable, as shown in Figure 5-27
.
Figure 5-27 Pushing the metal shell
Step 11 To complete the assembly of the other end, repeat
----End
Assembling an Unshielded RJ45 Connector and Ethernet Cable
Context
Figure 5-28 shows the components of an unshielded RJ45 connector and cable.
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Figure 5-28 Components of an unshielded RJ45 connector and cable
A
5 Appendix
B
C
A. Plug of connector B. Jacket C. Twisted-pair wires
Procedure
Step 1
Remove a 16-mm (0.63 in.) long section of the jacket, as shown in Figure 5-29
.
NOTICE
When you remove the shield layer, do not damage the insulation of the twisted-pair cable.
Figure 5-29 Removing the jacket of a twisted-pair cable (unit: mm (in.))
Step 2 Align the four pairs of wires and cut the ends neatly, as shown in
. The connections between the wires and the pins are listed in
Figure 5-30 Connections between wires and pins (unit: mm (in.))
C
Pin 8
Pin 1
White-Orange
Orange
White-Green
Blue
White-Blue
White-Brown
Brown
16
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6
7
4
5
Table 5-6 Connections between wires and pins (using a straight-through cable as an example)
Matching Pins of Wires Wire Color
1 White-Orange
2
3
Orange
White-Green
Blue
White-Blue
Green
White-Brown
8 Brown
Step 3
Feed the cable into the plug, and crimp the connector, as shown in Figure 5-31
.
NOTE
When inserting the cable, check from the side or bore of the plug to ensure that the cable is completely seated in the plug.
Figure 5-31 Crimping the connector
Step 4 To complete the assembly of the other end, repeat
----End
Checking the Appearance of Contact Strips
Context
Issue 01 (2016-09-30) l To ensure proper contact between the crimped wires and the wire conductors, the heights and sizes of the contact strips must be standard and the same.
l The contact strips must be parallel to each other, with an offset of less than ± 5°. The top margin of a strip must be parallel to the axis of the connector, with an offset of less than
± 10°.
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Hardware Installation and Maintenance Guide 5 Appendix l To ensure conductivity, the surface of the contact strips must be clean.
l The contact strips must be in good contact with the RJ45 socket. The plastic separators must remain intact and be aligned.
l The contact strip blade must extend beyond the ends of the wires. The ends of the wires must be in contact with the edge of the RJ45. The distance between them must be less than 0.5 mm (0.02 in.).
Procedure
Step 1 Hold the crimped connector, with the front side facing you, and check whether the contact strips are of the same height. The height should be 6.02 ± 0.13 mm (0.237 ± 0.005). If a measuring tool is not available, you can compare the connector with a standard connector.
Figure 5-32 shows an unqualified piece, and Figure 5-33
shows a qualified piece.
NOTE
All unqualified pieces must be crimped again.
Figure 5-32 Contact strips of different heights
Figure 5-33 Contact strips of the same height
Step 2 Hold an RJ45 connector and turn it 45°. Observe the top edges of the metal contact strips.
Figure 5-34 shows an unqualified piece.
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Figure 5-34 Unparallel contact strips of different heights
5 Appendix
Step 3 Check whether the contact strips are clean. If they are not clean and the dirt cannot be
removed, replace it with a new RJ45 connector. Figure 5-35
shows an unqualified piece.
Figure 5-35 Dirt on a contract strip
Step 4 Check whether the contact strips and the plastic separators are well aligned and intact. If a
separator is skewed and cannot be fixed, replace it with a new RJ45 connector. Figure 5-36
shows an unqualified piece.
Figure 5-36 Skewed plastic separators
Step 5 Hold the connector with the side facing towards you, and check whether you can see the cross-sections of the wires. Ensure that the ends of the wires are in good contact with the edge
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crimped with the wires. If not, replace the connector. Figure 5-37
shows an unqualified piece.
Figure 5-37 Wires not in good contact with the edge of the RJ45
----End
Testing the Connection of Assembled Cables
Context
Issue 01 (2016-09-30)
Huawei provides two types of Ethernet cables: straight-through cables and crossover cables.
l Straight-through cables are connected in a one-to-one manner. They are used to connect
terminals such as a computer or switch to network devices. Table 5-7
lists the connections of core wires in a straight-through cable.
5
8
7
3
4
1
6
Table 5-7 Connections of core wires in a straight-through cable
RJ45 Connector 1 RJ45 Connector 2 Core Wire Color Twisted or Not
2 2 Orange Twisted
1
6
3
4
Orange-White
Green
Green-White
Blue
Twisted
Twisted
5
8
7
Blue-White
Brown
Brown-White
Twisted l Crossover cables are connected in a crossover manner. They are used to connect
terminals such as two computers or switches. Table 5-8
lists the connections of core wires in a crossover cable.
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5
8
1
4
Table 5-8 Connections of core wires in a straight crossover cable
RJ45 Connector 1 RJ45 Connector 2 Core Wire Color Twisted or Not
6 2 Orange Twisted
3
2
1
6
Orange-White
Green Twisted
3
4
5
8
Green-White
Blue
Blue-White
Brown
7 7
Figure 5-38 shows the pins of an RJ45 connector.
Brown-White
Twisted
Twisted
Figure 5-38 Pins of an RJ45 connector
Pin8
Pin1
Procedure
Step 1 Feed both connectors of the cable into the ports of the cable tester.
Step 2 After the connectors are properly inserted, turn on the tester. If the indicators from 1 to G turn on simultaneously, you can infer that the pins work normally and the wires are correctly connected.
NOTE
Turn the switch to the S position to slow down lighting of the indicators so that you can see the
indicators more clearly, as shown in Figure 5-39
.
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Figure 5-39 Testing the conduction and connections of wires
5 Appendix
Step 3
Gently shake the connector and repeat Step 2
to check whether the metal contact strips are in
good contact with the core wires and Ethernet ports, as shown in Figure 5-40
.
Figure 5-40 Checking the reliability
Issue 01 (2016-09-30)
The procedure for testing a crossover cable is the same as that for testing a straight-through cable except for the sequence in which the indicators turn on, which depends on the wire connections of a crossover cable.
The Ethernet cable is qualified if the indicators turn on in the following sequence:
At the master (left) section of the tester, the indicators turn on in the sequence of 1-8-G. At the slave (right) section of the tester, the indicators turn on in the sequence of 3-6-1-4-5-2-7-8-G.
If the indicators do not come on in this sequence, the Ethernet cable is unqualified.
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NOTE
If a tester is not available, you can use a multimeter to perform a simple test, as shown in
Figure 5-41 Testing the connection of an Ethernet cable
----End
5.1.4 Installing Cable Accessories
Precautions for Installing Cable Accessories
Tools
NOTE
The illustrations in this document may differ from actual situations, but the installation methods are the same. For example, in this document, the adapters of cable connectors have separate interfaces. In the actual situation, the adapters may have interfaces fixed on equipment.
Use dedicated tools provided or specified by Huawei and follow the installation procedure described here.
Bending Radius
Unless otherwise specified, bending radius (R) of cables or fibers must meet the requirements listed in
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Table 5-9 Bending radius of cables or fibers
Cable or Fiber
Ordinary cable
Fiber
Bending Radius (R)
In normal cases, R ≥ 2d. When the cable is connected with a connector, R ≥ 5d.
R ≥ 40 mm (1.57 in.); Bending angle > 90°
NOTE
The letter d indicates the diameter of a cable or fiber.
Precautions for Installation
l Hold terminals of cables instead of pulling the cables themselves when installing or removing cable components.
l Do not insert a connector forcibly when the connector is blocked. Use a dedicated tool to pull out the connector. Install the connector again after you check that the pins are inserted properly.
l Before tightening screws on cable connectors, ensure that the connectors are properly connected to their adapters. Tighten the screw with appropriate force using a flat-head or
Phillips screwdriver instead of bare hands or an electric screwdriver. If the screw cannot be screwed into the tapped hole, determine the reason and try again. Do not apply too much force, or the screw or adapter may be damaged.
l When removing densely aligned cables or fiber connectors, use dedicated pliers such as cable-pulling pliers and fiber-pulling pliers.
l Do not twist, bend, stretch, or extrude fibers during installation.
l Cover the idle fiber connectors with dust caps. Remove the dust caps before using the fiber connectors.
Requirements for Cable Routing
l To protect cables, remove the burrs in the cable through-holes or install protective rings in the holes.
l To ease the connection and to avoid stress, keep cable joints slack. After connecting multiple cables to a connector that has multiple interfaces, keep the cables slack to avoid generating stress.
l Bind or clean cables gently because cable distortion affects signal quality.
l Keep cables away from moveable components such as doors.
l Sharp objects must not touch cable wiring to prevent damage to cables.
l To protect power cables, route power cables of the active and standby power modules separately.
Installing Power Adapters
Installing the OT Terminal
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Procedure
5 Appendix l Install an OT terminal.
a.
Align the hole of the OT terminal (conductor upward) with a connecting hole, as shown in
Figure 5-42 Aligning the OT terminal with a connecting hole
NOTE
When you install an OT terminal, the crimping sleeve is installed as shown in Figure 5-43
, where A is correct and B is incorrect.
Figure 5-43 Installing an OT terminal, showing the orientation of crimping sleeve b.
Place the spring washer and flat washer in turn, mount a matching screw, and fasten
it clockwise, as shown in Figure 5-44
.
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Figure 5-44 Installing two terminals back to back
5 Appendix
NOTICE
Ensure that the OT terminal is not in contact with other terminals or metal components.
c.
Move the cable slightly and ensure that it is securely connected, as shown in Figure
.
Figure 5-45 Installed OT terminal
Issue 01 (2016-09-30) l Install two OT terminals on a post.
Before you install two OT terminals on a post, ensure that the two terminals can be installed on the post and that the electrical connecting pieces have a large contact area.
Two OT terminals can be installed using any of these methods:
–
Bend the upper OT terminal at a 45- or 90-degree angle, as shown in Figure 5-46
.
– Cross the two terminals, as shown in
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Figure 5-46 Bending the upper OT terminal at a 45- or 90-degree angle
5 Appendix
Figure 5-47 Crossing two terminals
NOTICE
If the two terminals are different sizes, place the smaller one above the bigger one. A maximum of two terminals can be installed on a post.
l To remove an OT terminal, loosen the screw counterclockwise.
----End
Installing the Cord End Terminal
Procedure
Step 1
Hold a cord end terminal upright and place it on a terminal jack, as shown in Figure 5-48 . To
ensure bump contact and dense connection, place the plain side of the terminal outwards.
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Figure 5-48 Placing a terminal on a terminal jack vertically
5 Appendix
Step 2 Insert the terminal into the jack vertically, and turn the screw clockwise to fasten the terminal, as shown in
.
Figure 5-49 Feeding the terminal into the jack
NOTICE l Ensure that the exposed section of the terminal is less than 2 mm (0.079 in.) in length.
l Do not press the insulation of the terminal.
l Insert only one terminal into one jack.
Step 3 Move the cable slightly and ensure that it is securely connected.
Step 4 Before you remove a cord end terminal, loosen the screw counterclockwise.
----End
Installing Ethernet Adapters
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Installing a Shielded Ethernet Connector
Procedure
Step 1 Hold the male and female connectors, with the male connector facing the female connector, as shown in
Figure 5-50 Holding the male and female shielded connectors
Step 2
Insert the male connector into the female connector, as shown in Figure 5-51
.
Figure 5-51 Feeding the male shielded connector into the female shielded connector
Step 3 When you hear a click, the cable connector is completely inserted in the port. (The clip on the cable connector pops up to fix the connector in the port.) Pull the connector slightly and ensure that it is securely connected, as shown in
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Figure 5-52 Installed shielded Ethernet connector
5 Appendix
Step 4 To remove an Ethernet connector, press the locking key and pull out the connector, as shown in
Figure 5-53 Removing a shielded Ethernet connector
----End
Installing an Unshielded Ethernet Connector
Procedure
Step 1 Hold the male and female connectors, with the male connector facing the female connector, as shown in
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Figure 5-54 Holding the male and female unshielded connectors
5 Appendix
Step 2
Feed the male connector into the female connector, as shown in Figure 5-55
.
Figure 5-55 Feeding the male connector into the female unshielded connector
Step 3 A crisp click indicates that the connector is locked by the locking key. Pull the connector
slightly and ensure that it is securely connected. Figure 5-56
shows an installed Ethernet connector.
Figure 5-56 Installed unshielded Ethernet connector
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Step 4 To remove an Ethernet connector, press the locking key and pull out the connector, as shown in
Figure 5-57 Removing an unshielded Ethernet connector
----End
Installing Fiber Connectors
Context
NOTICE l After you remove the dustproof cap, ensure that the fiber pins are clean and install them as soon as possible.
l When you disassemble fiber connectors, you must use a dedicated tool if the connectors are densely installed.
Cleaning Fiber Connectors
Procedure
Step 1 Clean the pins of a fiber connector by using lint-free cotton and alcohol.
Step 2 Clean the pins again by using dust-free cotton. If necessary, clean the pins by using an air gun.
Ensure that the pins are free from any fiber or debris.
----End
Installing an FC Fiber Connector
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Procedure
Step 1 Remove the dustproof cap of the FC connector and store it for future use.
Step 2 Align the core pin of the male connector with that of the female connector, as shown in
Figure 5-58 Aligning the male connector with the female connector
Step 3 Align the male connector with the female connector and gently push the male connector until it is completely seated in the female connector, as shown in
Figure 5-59 Feeding the male connector into the female connector
Step 4 Fasten the locking nut clockwise and ensure that the connector is securely installed, as shown in
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Figure 5-60 Fastening the locking nut
5 Appendix
Step 5 To disassemble an FC fiber connector, loosen the locking nut counterclockwise, and gently
pull the male connector, as shown in Figure 5-61 .
Figure 5-61 Disassembling an FC fiber connector
----End
Installing an LC Fiber Connector
Procedure
Step 1 Remove the dustproof cap of the LC fiber connector and store it for future use.
Step 2 Align the core pin of the male connector with that of the female connector, as shown in
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Figure 5-62 Aligning the male connector with the female connector
5 Appendix
Step 3 Align the male connector with the fiber adapter and gently push the male connector until it is
completely seated in the fiber connector, as shown in Figure 5-63 .
Figure 5-63 Feeding the male connector into the female connector
Step 4
A clicking sound indicates that the male connector is locked, as shown in Figure 5-64
.
Figure 5-64 Installed LC connector
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Step 5 To disassemble an LC fiber connector, press the locking nut to release the locking clips from
the bore, and gently pull the male connector, as shown in Figure 5-65 .
Figure 5-65 Disassembling an LC fiber connector
----End
Installing the SC Fiber Connector
Procedure
Step 1 Remove the dustproof cap of the SC fiber connector and store it for future use.
Step 2 Align the core pin of the male connector with that of the female connector, as shown in
Figure 5-66 Aligning the male connector with the female connector
Step 3 Feed the fiber connector into the female connector, with your fingers holding the shell of the fiber connector (not the pigtail). When you hear a click, the fiber connector is secured by the clips (internal parts, not illustrated in the figure). Pull the fiber connector gently. If the
connector does not loosen, the installation is complete. See Figure 5-67
.
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Figure 5-67 Installed SC fiber connector
5 Appendix
Step 4 To disassemble an SC fiber connector, hold the shell of the connector (do not hold the fiber) and gently pull the connector in the direction vertical to the adapter. Unlock the male connector, and then separate it from the shell, as shown in
Figure 5-68 Disassembling an SC fiber connector
----End
Installing an MPO Connector
Procedure
Step 1 Remove the dustproof cap of the MPO fiber connector and store it for future use.
Step 2 Align the core pin of the male connector with that of the female connector, as shown in
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Figure 5-69 Aligning the male connector with the female connector
5 Appendix
Step 3 Hold the shell labeled "PUSH" and feed the male connector into the female connector until you hear a clicking sound. The male and female connectors are securely installed, as shown in
Figure 5-70 Installed MPO fiber connector
Step 4 To disassemble an MPO fiber connector, hold the shell labeled "PULL" and remove the male
connector, as shown in Figure 5-71
.
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Figure 5-71 Disassembling an MPO fiber connector
5 Appendix
----End
5.1.5 Replacing the Mold of the Crimping Tool
Procedure
Step 1 Hold the handles of a pair of COAX crimping tools. Loosen the two fastening screws
counterclockwise, as shown in Figure 5-72
.
Figure 5-72 Loosening two fastening screws
Step 2 Hold the handles of the COAX crimping tools to open the self-locking mechanism. The jaw
of the COAX crimping tools opens automatically, as shown in Figure 5-73
.
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Figure 5-73 Pliers jaw opening automatically
5 Appendix
Step 3
Remove the mold from the COAX crimping tools, as shown in Figure 5-74 .
Figure 5-74 Removing the mold from the COAX crimping tools
Step 4 Place the mold to be installed into the jaw of the COAX crimping tools and align the screw
holes, as shown in Figure 5-75
.
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Figure 5-75 Installing a new mold in the COAX crimping tool
5 Appendix
NOTICE
Keep the short side of the mold inwards and the long side outwards, with the teeth of the mold aligning from the larger size to the smaller size.
Step 5 Hold the handles of the COAX crimping tools tightly to match the mold and the jaw completely. Align the screw holes, as shown in
Figure 5-76 Aligning the screw holes
Step 6 Hold the handles of the COAX crimping tools with one hand. Tighten the two fastening
and
shows the mold installed in the COAX crimping tool.
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Figure 5-77 Mold installed in the COAX crimping tool
5 Appendix
Figure 5-78 An installed mold
----End
5.2 Environmental Requirements for Device Operation
5.2.1 Environmental Requirements for an Equipment Room
Requirements for Selecting a Site for an Equipment Room
When designing a project, consider the communication network planning and technical requirements of the equipment. Also consider hydrographic, geological, seismic, power supply, and transportation factors.
Construction, structure, heating and ventilation, power supply, lighting and fire-proof construction of the equipment room should be designed by specialized construction designers to suit the environmental requirements of devices. The equipment room should also follow local regulations concerning the industrial construction, environmental protection, fire safety, and civil air defense. Construction must conform to government standards, regulations, and other requirements.
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The equipment room should be located in a place free from high temperature, dust, toxic gases, explosive materials, or unstable voltage. Keep the equipment room away from significant vibrations or loud noises, as well as power transformer stations.
The specific requirements for selecting a site for an equipment room are as follows: l The room should be located at a distance of at least 5 km (3.11 mi.) from heavy pollution sources such as smelting and coal mines. It should be located at a distance of at least 3.7
km (2.30 mi.) from moderate pollution sources such as chemical, rubber, and galvanization factories. It should be located at a distance of at least 2 km (1.24 mi.) from light pollution sources such as packinghouses and tanyards. If these pollution sources cannot be avoided, ensure that the equipment room is upwind of the pollution sources. In addition, use a high-quality equipment room or protection products.
l The room should be located away from livestock farms, or be upwind of the livestock farms. Do not use an old livestock room or fertilizer warehouse as the equipment room.
l The equipment room must be far away from residential areas. An equipment room that is not far away from residential areas must comply with equipment room construction standards to avoid noise pollution.
l The room should be located far away from industrial and heating boilers.
l The room should be at least 3.7 km (2.30 mi.) away from the seaside or salt lake.
Otherwise, the equipment room should be airtight with cooling facilities. In addition, alkalized soil cannot be used as the construction material. Otherwise, equipment suitable for wet conditions must be used.
l The doors and windows of the equipment room must be kept closed to maintain an airtight room.
l Using steel doors to ensure sound insulation is recommended.
l No cracks or openings are allowed on the walls or floors. The outlet holes on the walls or windows must be sealed. Walls must be constructed such that they are smooth, wearresistant, dustproof, flame retardant, sound insulated, heat absorptive, and have electromagnetic shielding.
l The air vent of the room should be far from the exhaust of city waste pipes, big cesspools and sewage treatment tanks. The room should be in the positive pressure state to prevent corrosive gases from entering the equipment room and corroding components and circuit boards.
l It is recommended that the room be on or above the second floor. If this requirement cannot be met, the ground for equipment installation in the room should be at least 600 mm (23.62 in,) above the maximum flood level.
l The equipment room should be strong enough to resist winds and downpours.
l The room should be located away from dusty roads or sand. If this is unavoidable, the doors and windows of the equipment room must not face pollution sources.
l Do not place air conditioning vents near the equipment so that they blow directly on the equipment because condensation may be blown into the equipment.
l Do not use decorative materials that contain sulfur in the equipment room.
Equipment Room Layout
An equipment room usually contains mobile switching equipment, telecommunications equipment, power supply equipment, and other auxiliary equipment. To ensure easy
maintenance and management, place the equipment in different rooms. Figure 5-79
shows the layout of the equipment room.
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Figure 5-79 Layout of the equipment room
Control room Generator room
5 Appendix
Transmission room
Main communication equipment room
Power distribution room
Battery room
Substation room
Communication cable and optical cable
Power cable
The general layout principles of the equipment room are as follows: l It should meet requirements for laying out and maintaining communication cables and power cables.
l It should reduce the cabling distance, which facilitates cable maintenance, reduces potential communication faults, and maximizes efficiency.
Construction Requirements for the Equipment Room
describes the construction requirements for the equipment room.
Table 5-10 Construction requirements for the equipment room
Item
Area
Requirements
The smallest area of the equipment room can accommodate the equipment with the largest capacity.
Net height
Floor
Load-bearing capacity
The minimum height of the equipment room should not be less than 3 m
(9.84 ft). The minimum height of the equipment room is the net height below overhead beams or ventilation pipes.
The floor in the equipment room should be semi-conductive and dustproof. A raised floor with an ESD covering is recommended. Cover the raised floor tightly and solidly. The horizontal tolerance of each square meter should be less than 2 mm (0.08 in.). If raised floors are unavailable, use a static-electricity-conductive floor material, with a volume resistivity of 1.0 x 107 ohms to 1.0 x 1010 ohms. Ground this floor material or raised floor. You can connect them to ground using a one megohm current-limiting resistor and connection line.
The floor must bear loads larger than 150 kg/m 2 (0.21 bf/in.
2 ).
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Item
Door and windows
Wall surface treatment
Cable trays
Water pipe
Internal partition wall
Installation position of the air conditioner
Other requirements
Requirements
The door of the equipment room should be 2 m (6.56 ft) high and 1 m
(3.28 ft) wide. One door is enough. Seal the doors and windows with dustproof plastic tape. Use double-pane glass in the windows and seal them tightly.
Paste wallpaper on the wall or apply flat paint. Do not use pulverized paint.
Use cable trays to arrange cables. The inner faces of the cable trays must be smooth. The reserved length and width of the cable trays, and the number, position and dimensions of the holes must comply with the requirements of device arrangement.
Do not pass service pipes, drainpipes, and storm sewers through the equipment room. Do not place a fire hydrant in the equipment room, but place it in the corridor or near the staircase.
Separate the area where the equipment is installed from the equipment room door. The partition wall can block some outside dust.
Install air conditioner vents so that the air does not blow directly on equipment.
Avoid the proliferation of mildew, and keep out rodents (like mice).
Figure 5-80 Internal partition wall inside the equipment room
Equipment Room Environment
Dust on devices may cause electrostatic discharge and result in poor contact for connectors or metal connection points. This problem can shorten the life span of devices and cause faults.
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The equipment room must be free from explosive, conductive, magnetically-permeable, and
lists the requirement for dust concentration in the equipment room.
Table 5-11 Requirements for dust particles in the equipment room
Mechanical active material
Unit Concentration
Dust particle Particle /m 3 ≤ 3x 10 4
(no visible dust accumulated on a workbench in three days)
Suspending dust mg/m 3 ≤0.2
Precipitable dust mg/m 2 ·h
Description l Dust particle diameter ≥ 5 µm l Suspending dust diameter ≤ 75 µm l 75 µm ≤ precipitable dust diameter ≤ 150 µm
≤1.5
Take the following measures to meet the requirements: l Use dustproof materials for ground, wall, and ceiling construction.
l Use screens on the door and windows facing outside. The outer windows should be dustproof.
l Clean the equipment room regularly and clean the air filter monthly.
l Wear shoe covers and ESD clothing before entering the equipment room.
Requirements for Corrosive Gases
The room should be free from dusts and corrosive gases, such as SO
2
, H
2
S, and NH
3
lists the requirements for the corrosive gas concentration.
Table 5-12 Requirements for corrosive gas concentration
Chemical active material Unit Concentration
SO
2
H
2
S mg/m 3 mg/m 3
≤0.20
≤0.006
NH
Cl
2
3 mg/m mg/m
3
3
≤0.05
≤0.01
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Hardware Installation and Maintenance Guide 5 Appendix l Avoid constructing the room near a place where the corrosive gas concentration is high, such as a chemical plant.
l Ensure the air intake vent of the room is in the prevailing upwind direction from any pollution source.
l Place batteries in different rooms.
l A professional service should monitor the corrosive gas conditions regularly.
Requirements for ESD Prevention
The absolute value of electrostatic voltage must be less than 1000 V.
Take the following measures to meet this requirement: l Train operators about ESD prevention.
l Keep the correct humidity level in the equipment room to reduce the impact of static electricity.
l Lay out an ESD floor in equipment rooms.
l Wear ESD shoes and clothing before entering equipment room.
l Use ESD tools, such as wrist straps, tweezers, and pullers.
l Ground all conductive materials in the room, including computer terminals. Use ESD worktables.
l Keep non-ESD materials (such as common bags, foam, and rubber) at least 30 cm (11.81
in.) away from boards and ESD-sensitive components.
Electromagnetism Requirements for the Equipment Room
All interference sources, inside or outside the equipment room, can cause equipment problems with capacitive coupling, inductive coupling, electromagnetic wave radiation, and common impedance (including grounding system) coupling. Prevent the interference using these approaches: l Take effective measures against electrical interference from the power supply system.
l Do not use the working ground of the equipment as the same ground for surge protection. Separate them as far as possible.
l Keep the equipment far away from high-power radio transmitters, radar units, and highfrequency and high-current equipment.
l Use electromagnetic shielding if necessary.
Requirements for Lightning Proof Grounding
lists the requirements for lightning proof grounding.
Table 5-13 Requirements for lightning proof grounding
Item Requirements
Capital construction l Use reinforced concrete to construct the equipment room.
l Install a lightning proof device like a lightning rod outside the room.
l The lightning proof ground shares the same grounding body with the protective ground of the room.
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Item
Power cables leading in the equipment room need to be equipped with a surge protector
Grounding for
DC power distribution
Equipotential connection
General requirements for grounding
Grounding resistance
Requirements l After the low-voltage power cables are led into the room, install the surge protector for the power cables in the AC voltage stabilizer and the AC power distribution panel (box). Correctly ground the surge protector nearby.
l For an equipment room in urban area, install a power supply surge protector with the nominal discharge current of no less than 20 kA.
For an equipment room that is built in a suburb and subject to lightning strikes, install a power supply surge protector with the nominal discharge current of more than 60 kA. For an equipment room that is built in a mountain area and subject to frequent lightning strikes, or in a separate high-rise building in a city, install a power supply surge protector with the nominal discharge current of more than 100 kA.
l The ground cable of the surge protector should be no longer than 1 m (3.28 ft).
l Connect the DC working ground (positive pole of the -48 V DC power supply or the negative pole of the 24 V DC power supply) with the indoor collective ground cable nearby. The total ground cable should meet the maximum load of the equipment.
l The power equipment must have a DC working ground cable, which can connect the power equipment to the collective ground cable of the telecommunication site (or the protective ground bar of the equipment room).
l Properly ground the devices and auxiliary devices in the room such as mobile base station, transmission, switching equipment, power supply equipment, and cable distribution frame. Connect all PGND cables to the collective protective ground bar. Connect all PGND cables in one equipment room to one protective ground bar.
l Apply joint grounding to the working ground and protective ground of devices, which means the two share one grounding network.
l The cable tray, rack or shell, metal ventilation pipe, metal door or window of the equipment should be grounded for protection.
l Do not connect the neutral line of the AC power cable with the protective ground of any telecom equipment in the equipment room.
l Do not install a fuse or switch on the ground cable.
l All ground cables should be as short as possible, and arranged in a straight line.
l The grounding resistance must be lower than 1 ohm.
l The upper end of the grounding body should be at least 0.7 m (2.30
ft) over the ground. In cold areas, bury the grounding body below the frozen ground.
l Measure the grounding resistance periodically to ensure effective grounding.
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Item
Routing of signal cable
Collective ground cable
Grounding leadin
Requirements l Do not arrange the signal cables overhead in the equipment room.
All signal cables must be led into the site underground.
l Use the cables with a metal jacket or place them into a metal pipe if they come out/in the equipment room.
l Ground the idle lines inside the cable in the equipment room.
l Signal cables should be deployed on internal walls. Do not deploy outdoor aerial cables.
l Keep signal cables away from power cables and surge protection devices.
l Use a ground ring or ground bar for the collective ground cable.
l Do not use aluminum cables as ground cables. Adopt measures to prevent electrification corrosion when connecting different metal parts together.
l Use a copper busbar as the collective ground cable with a crosssectional area of no less than 120 mm 2 (0.19 in.
2 ), or use the galvanized flat steel of the same resistance. Insulate the collective ground cable from the reinforcing steel bars of the building.
The grounding lead-in should be a maximum of 30 m (98.42 ft) long.
Use the galvanized flat steel with cross-sectional area of 40 mm x 4 mm (1.58 in. x 0.158 in.) or 50 mm x 5 mm (1.97 in. x 0.197 in.).
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Item
Grounding of the cabinet
Requirements l All the devices including the surge protection device in the cabinet must be connected in an equipotential manner. The ground cables can be aggregated to the ground bar or surge protector socket first, and then the ground bar or surge protector socket can be connected to the ground.
l The resistance between the device ground terminals and ground bar cannot exceed 0.1 ohm.
l The cabinet can be grounded using the protecting earthing (PE) wire of the electrical network in the building, zinc-coated angle steel, or the main steel bar of the building.
l If the cabinet is grounded using the PE wire of the electrical network, use a multimeter to test the grounding status. If the voltage between the PE wire and neutral wire is lower than 5 V and the voltage between the PE wire and live wire is about 220 V, the PE wire is grounded well. If the tested AC voltages are not within the ranges, the cabinet must be grounded in other ways.
l The yellow-green ground cable contains multiple copper wires. The cross-sectional area of the ground cable must be no less than 6 mm 2
(0.0093 in.
2 ) and the length cannot exceed 3 m (9.84 ft.).
l Ground cables cannot be twisted with signal cables.
l Antirust and anticorrosion measures must be taken on the ground terminals.
l The fiber reinforcing rib can be directly connected to the ground bar of the cabinet. Before wrapping the reinforcing rib with insulation tape, cut a 0.5 m (1.64 ft.) segment from the reinforcing rib. Wrap the reinforcing rib with at least five layers of insulation tape. Keep the reinforcing rib at least 5 cm (1.969 in.) from the cabinet surface.
5.2.2 Requirements for Power Supply
Requirements for AC Power Supply
An AC power supply system consists of power mains, uninterruptible power supplies (UPSs), and self-supplied electric generators. In addition to meeting the requirements of the server load, the AC power supply must have a simple connection line, safe operation, flexible scheduling, and easy maintenance.
The low-voltage power supply should be 3-phase, 5-wire mode or monophase 3-wire mode.
This AC power supply should be 110 V/220 V, with a frequency of 50 Hz.
The UPS should supply the same power and operate at the same phase as the power mains.
The switching time between the UPS and mains should be less than 10 ms; otherwise, the networking devices will reboot or reset.
For power distribution capacity in the equipment room, both the working current and fault current of the devices should be considered. Ensure that independent AC power supplies
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lists the voltage range of the AC power supply for the devices.
Table 5-14 Voltage range of AC power supply
Item Requirements
-10% to +5% of the rated voltage AC power capacity to support the devices
AC power capacity to support the power modules and important buildings
-15% to +10% of the rated voltage
Frequency of alternating current
Voltage wave shape sine distortion
-4% to +4% of the rated value
Within 5% of the rated voltage
The automated electric generator must have a standard interface that supports telecommunication protocols, remote telecommunication, monitoring, and control.
AC power cables should meet the following specifications: l AC neutral should have a conductor with the same cross section as the phase line.
l AC cables should have non-flammable insulation. The layout of AC cables should comply with local regulations. Low-voltage power distribution rooms should comply with local regulations.
Recommendations for AC Power Supply
The following are recommendations for the AC power supply.
l If the voltage of the power mains that supply power directly to devices exceeds the rated voltage by -10% to 5%, or exceeds the voltage range that devices can support, a voltage regulating device or voltage stabilizing device is required.
l If the mains do not supply power for the device directly, or if the mains voltage exceeds the rated voltage by -15% to 10% or exceeds the input voltage range of the DC power supply, a voltage regulating device or voltage stabilizing device is required.
l A UPS or inverter power supply system is required to provide uninterrupted AC power to support the telecommunication load.
l If abnormalities occur on the mains, telecommunication servers should be equipped with a self-supplied electric generator to support the key telecommunication load. The capacity should be not less than 150% to 200% of the total uninterruptible power supply.
l Storage batteries are usually installed in a parallel connection of two groups. UPS storage batteries are generally installed in one group. The redundancy required for the
UPS can rely on concatenation or parallel connection. When an inverter or a UPS is used, the active inverter is determined by the maximum power and a backup inverter is required.
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Requirements for DC Power Supply
The equipment room should receive stable and reliable DC power. Deploy the power equipment near the telecommunications equipment to make the DC feeder as short as possible. To reduce power consumption and installation cost, the loop voltage drop from the battery port to the equipment port should be less than 3.2 V.
l A large-scale enterprise can deploy an independent power supply system on each floor to supply power to the telecommunications equipment room on the respective floor.
l A medium-scale enterprise can use a power room and a battery room for centralized power supply or use distributed power supply systems.
l A small-scale enterprise can deploy an integrated power supply system in its equipment room but must take measures to prevent corrosive gases released from batteries from eroding circuit boards of telecommunications equipment.
lists the specifications for the DC power supply.
Table 5-15 Specifications for the DC power supply
Item Requirements
DC power capacity to support the surge current
Greater than 1.5 times the rated current
Regulated voltage precision
Overshoot amplitude of switch on/off
If the AC input voltage is in the range of 85% to 110% of the rated value, and the load current is in the range of 5% to 100% of the rated value, the output voltage of the rectifier ranges from -46.0 V to -56.4 V, with the regulated voltage precision less than or equal to 1%.
Integral value of the DC output voltage ±5%
Peak noise voltage
Dynamic response
≤200 mV
The recovery time is less than 200 ms. The overshoot is in the range of the integral value of the DC output voltage ±5%.
Recommendations for DC Power Supply
The following are recommendations for the DC power supply.
l Use distributed power supply mode. Use multiple DC power supply systems and put power equipment in multiple locations.
l Adopt a standard DC power supply system, and set the output voltage to the communications equipment within the required range.
l Improve reliability of the AC power supply system to reduce the necessary capacity of storage batteries. For small offices, increase the capacity of storage batteries if it is difficult to enhance reliability of the AC power supply system.
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Hardware Installation and Maintenance Guide 5 Appendix l The total capacity of the high-frequency switching rectifier must satisfy the power of the communication loading and battery charging. If there are 10 or fewer active rectifier modules, configure one backup module. If there are more than 10 active modules, configure one backup module for every 10 active modules.
l Install storage batteries in two or more groups. The capacity is determined by the duration for which the storage batteries must supply power. For most offices, the batteries should be able to supply power for at least one hour.
5.3 Equipment Grounding Specifications
5.3.1 General Grounding Specifications
shows the general grounding specifications.
Table 5-16 General grounding specifications
No.
Description
1 The working ground and protective ground, including the shielded ground and the lightning-proof ground of the cable distribution frame should share the same grounding conductor.
2
3
4
5
The cable trays, shells, metal ventilation pipes, metal doors and windows in the equipment room should be grounded for protection.
The metal parts of the equipment which are electrically floating in normal conditions should be grounded for protection.
The ground cable must be connected securely to the protective ground bar of the equipment room.
Do not use other equipment as part of the ground cable or electrical connection.
5.3.2 Grounding Specifications for an Equipment Room
The grounding resistance of a comprehensive communication building should be less than or equal to one ohm. The grounding resistance of an ordinary communication office should be less than five ohms. The grounding resistance in an area where the earth resistance rate is high should be less than 10 ohms.
5.3.3 Grounding Specifications for Devices
lists the equipment grounding specifications.
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Table 5-17 Equipment Grounding Specifications
No.
Description
1 All communication devices and auxiliary devices (such as mobile base stations, transmission and switching devices, power supply devices) in the equipment room should be grounded for protection. Connect all protective ground for various devices jointly to a general ground bar, and then to the same protective ground bar in the room together with the protective ground (PGND) of the device.
2
3
4
The PGND of the equipment is shorted to the copper ground bar provided by the customer. The short-circuiting cable used should be a yellow-green plastic insulated cable with a copper core and a cross-sectional area greater than 25 sq.
mm (0.039 sq. in.).
There are grounding terminals and grounding lugs at the lower part of the front door, rear door and side panel of the cabinet, connected to the grounding terminals of the cabinet framework through connection cables with cross-sectional area of no less than 1.6 sq. mm (0.002 sq. in.).
Ensure that all metal components of the cabinet conduct well. No insulating coating should be sprayed on the connection part of the metal components.
5
6
Connect the cabinets in the same row by fastening captive screws and gaskets on the top of the cabinets. Do not spray any coating into a rectangular area measuring
30 mm x 50 mm (1.18 in. x 1.97 in.) around the connection hole for a captive bolt.
Measures to prevent rust and corrosion must be taken for this area. Zinc electroplating with iridescent yellow chromate conversion coating should be applied to the gasket and nut to ensure good electrical contact.
When combining cabinets of the same type, short-circuiting cables are required to connect the ground busbars (if any) of the cabinets. The cross-sectional area of the short-circuiting cable is 6 sq. mm (0.009 sq. in.) and is no more than 300 mm (11.8
in.) long. Connect the two ends of the short-circuiting cable to the ground busbar terminals of neighboring cabinets and fix them firmly.
5.3.4 Grounding Specifications for Communications Power
Supply
shows the grounding specifications for communication power supplies.
Table 5-18 Grounding specifications for communication power supplies
No.
Description
1 The inlet for the AC power cable at the equipment room should be equipped with a surge protection device (C-level) with a nominal discharge current no less than 20 kA.
2 The protective ground for the power supply and that for communication equipment share the same grounding conductor. If the power supply and the equipment are in the same equipment room, use the same protective ground bar for them if possible.
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No.
Description
3 Use a surge protection circuit on the AC power interface.
4
5
6
The positive of the -48 V DC power supply or negative pole of the 24 V DC power supply should be grounded at the output of the DC power supply.
The working ground and protective ground of the DC power supply equipment should use the same grounding conductor with the protective ground of the switching equipment. If the power supply and equipment are in the same equipment room, use the same protection ground bar for them if possible.
Add surge protection on the DC power interface.
5.3.5 Grounding Specifications for Signal Cables
lists the grounding specifications for signal cables.
Table 5-19 Grounding specifications for signal cables
No.
Description
1 Equip the cable outdoors with a metal jacket, well grounded at both ends, or connect the ends of the metal jacket to the protective ground bar of the equipment room. For cables inside the equipment room, install surge protection devices at the interface to the equipment. The PGND cable for the surge protection devices should be as short as possible.
2
3
4
The incoming and outgoing signal cables to and from the office and unused wires inside the cable should be grounded for protection.
The Tone & Data Access (TDA) cable must pass through the Main Distribution
Frame (MDF) with surge protective device (SPD) when going out of the office.
The cable's shield layer should be connected to the protective ground of the MDF.
The MDF should use the same grounding conductor as the cabinet.
Do not route signal cables overhead.
5.3.6 Specifications for Laying Out Grounding Cables
shows the specifications for the ground cable.
Table 5-20 Specifications for laying out ground cables
No.
Description
1 The grounding wire should not run parallel to or twist around the signal cable.
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No.
Description
2 Bury ground underground or arrange them indoors. Do not route ground cables overhead.
3
4
Do not connect two cables together to extend the PGND cable, or add any switches or fuses.
The PGND cable should be an alternating yellow and green plastic insulated one with a copper core.
5
6
The neutral line of the AC power cable cannot be connected to the protective ground of transmission and communication equipment in the equipment room.
A PGND cable should be as short as possible, with a length of no more than 45 m
(147.64 ft).
5.4 Engineering Labels for Cables
An engineering label serves as an identifier for on-site installation and maintenance after the installation. Labels on the cables facilitate correct and orderly connection of cables, and easy maintenance after installation.
Engineering labels are specialized for power cables and signal cables: l Signal cables include network cables, optical fibers, and user cables.
l Power cables include the AC power cables and DC power cables.
NOTE
Fill in labels according to specified requirements to keep consistency of labels in the equipment room.
Make a relevant statement in the self-check report.
5.4.1 Introduction to Labels
Label Materials
Features: l Thickness: 0.09 mm (0.004 in.) l Color: chalk white l Material: polyester (PET) l Ambient temperature: -29°C (-20.2°F) to +149°C (300.2°F) l Printed by a laser printer and written with a marker l Pass UL and CSA authentication
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Type and Structure
Label for Signal Cables
The label for signal cables is L-shaped with fixed dimensions, as shown in
.
Figure 5-81 Label for signal cables
To specify more clearly the position of a cable, use the dividing lines on the label. For example, there is a dividing line between the cabinet number and the chassis number, and another one between the chassis number and the slot number. Each dividing line is light blue
(Pantone 656c) and 1.5 mm x 0.6 mm (0.06 in. x 0.02 in.).
The cut dotted line helps to fold the label when affixed to the cable, and its size is 1 mm x 2 mm (0.04 in. x 0.08 in.).
The word "TO:" (upside down in the figure) at the lower right corner of the label is used to identify the opposite end of the cable on which the label is affixed.
Power Cable Label
The label for power cables should be attached to the identification plate on the cable ties that are attached to the cable. The identification plate has an embossed area 0.2 mm x 0.6 mm
(0.008 in. x 0.02 in.) around (symmetric on both sides), and the area in the middle is for
affixing the label, as shown in Figure 5-82
.
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Figure 5-82 Power cable label
5 Appendix
Label Printing
The contents can be printed or written on the labels. Printing is recommended for the sake of high efficiency and eye-pleasant layout.
Template for Printing
You can obtain a template from the Huawei local office to print labels.
The template is made in Microsoft Word. Follow these instructions to use the template: l You can modify the contents of the template. Do not change settings of centered characters, direction, and fonts.
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Hardware Installation and Maintenance Guide 5 Appendix l If many characters need to be filled in, decrease the font size, but make sure that the printouts are clear and legible.
Merging Cells in the Template
To merge two or more cells, do as follows:
1.
Select Edit / Select All .
2.
Select Format / Borders and Shading / Borders . Select Box tab and click OK .
3.
Drag the mouse to select cells to be merged and select the Table / Merge Cells .
Requirements on the Printer
To print labels, use a laser jet printer of any model. Before printing labels, set up the page and try printing.
1.
Try printing on ordinary paper with both sides blank. Place the blank paper over the whole page of the label paper, and check whether the page setup conforms to the label layout.
2.
Make sure the printer properties, such as "paper size" and "direction", have been set correctly.
– If the printout conforms to the sheet of labels, print the labels on the label paper.
– If the printout does not conform, adjust the page setup and try printing again until the correct printout is produced.
The method for adjusting the page setup is as follows.
1.
Select File / Page Setup .
2.
Select Layout and set Header and Footer as 0.
3.
Select the Margins tab page. Select Left for Gutter Position and adjust the values of Top,
Bottom, Left, and Right.
NOTE
If the warning prompt as shown in
appears before printing, click Ignore to continue the printing.
Figure 5-83 Warning prompt before printing
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After the page setup has been made correctly, save it for future use. This page setup is only necessary the first time you use the template to print the labels.
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Requirements for Feeding the Printer
The label paper consists of two layers and has undergone multiple processing procedures such as printing and cutting. No matter what model of printer you use, feed in the labels one page at a time. To avoid jamming the labels, never use the auto-feed mode.
Feed in the label paper in the correct direction to ensure that the text is printed in a correct position.
Requirements for the Printed Label
Make sure that the printed labels satisfy the following requirements: l All the printouts must be on the label, and nothing should be printed on the backing layer of the label page.
l Contents in the cells should be aligned in the center. In a single-line printout, the dividing lines and the word "TO:" should not be covered by printed characters.
l When the cells are merged and the printouts are made in multiple lines, avoid covering the word "TO:" when printing the text. Use the space bar to move the text to the next line.
Writing Labels
Writing Tools
To make sure the printouts are clear and legible, use black markers instead of ball-point pens to write the labels.
If no marker is available, black ball-point pens are allowed, although not recommended.
Compared with ball-point pens, water-proof markers are better. When writing with a ballpoint pen, do not leave the oil on the label, which may contaminate the label and blur the words.
NOTE
The delivered marker has two nibs. Use the smaller nib to write the labels.
Font
For the sake of legibility, use standard block letters and numbers as shown in Table 5-21
(Times New Roman).
Table 5-21 Standard typeface for handwriting
0 1 2 3 4
I
9
R
A
J
S
B
K
T
C
L
U
D
M
V
5
E
N
W
O
X
6
F
P
Y
7
G
Q
Z
8
H
Determine the size of characters based on the number of letters or digits and ensure that the characters are distinct and tidy.
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Placement of text on a label is shown in
Figure 5-84 Placement of text on a label
5 Appendix
Attaching Labels
After printing or writing the label, remove the label from the page and attach it to the signal cable, or the identification plate of the power cable. The methods for attaching labels are described in the following sections.
Label for Signal Cables
l Choose the place to attach labels.
The label is attached 2 cm (0.79 in.) from the connector on a signal cable. In special cases (for example, to avoid cable bending or affecting other cables), other positions are allowed to attach the labels. The rectangular part with text is attached facing right or
downward, as shown in Figure 5-85
. The details are as follows:
– The identification card is to the right of the cable in vertical cabling.
– The identification card should be downward when you lay out the cable horizontally.
Figure 5-85 Text area of the label
Issue 01 (2016-09-30) l Procedure for attaching labels
Figure 5-86 shows the methods and procedures for attaching labels.
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Figure 5-86 Label for signal cables
5 Appendix
Power Cable Label
Remove the label from the backing page, and attach it to the identification plate on the cable tie. The label should be attached to the rectangular flute on the identification plate, and attached to only one side of the identification plate. The cable ties are bundled at 2 cm (0.79
in.) from the connectors, and other positions are allowed in special circumstances.
Cable ties should be bound on both ends of a cable. After the bundling, the finished identification plate should be on top of the cable in horizontal cabling, or on the right side of the cable in vertical cabling, as shown in
Figure 5-87 . The details are as follows:
l The identification card is to the right of the cable in vertical cabling.
l The identification card is on the top of the cable in horizontal cabling. Make sure that the label is facing out.
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Figure 5-87 Binding the label for the power cable
5 Appendix
Cable
TO:
B03 -48V2
The identification card is on the top of the cable in horizontal cabling.
The identification card is to the right of the cable in vertical cabling.
Contents of Engineering Labels
Contents of Labels for Power Cables
Labels for power cables are affixed on only one side of the identification plates. On the labels, there is information (the part after the word "TO:") about the location of the device on the other end of the cable, like the location of control cabinet, distribution box or power socket.
Contents of Labels for Signal Cables
The two sides of the label affixed on the signal cable carry information about the location of
the ports connected to both ends of the cable. Figure 5-88
shows the information on both sides of the labels affixed to the signal cables.
l Area 1 contains the location information of the local end of the cable.
l Area 2 (with the word "TO:") contains the location information of the opposite end of the cable.
l Area 3 has been folded up inside the label.
Figure 5-88 Printed parts on the label for signal cables
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Seen from the cabling end of the equipment, the text part of the label is on the right side of the cable. The side with "TO:" that is facing outside carries the location information of the opposite end; and the other side carries the location information of the local end.
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In other words, the information in Area 1 at one end is the same as the information in Area 2 at the other end of the cable.
Precautions for Using Engineering Labels
When using labels, pay attention to the following points: l When printing, writing, or attaching labels, keep the labels clean.
l Since the label paper is made of moistureproof material, ink-jet printers and ink pens cannot be used to print and write labels.
l Labels should be attached neatly. New-type labels are L-shaped. If they are pasted at incorrect locations or in the incorrect direction, the appearance of the device is affected.
l Power cable ties should be attached in the same positions on power cables, with identification plates on the same side.
l The positions of "up", "down", "left" or "right" are all based on the viewpoint of the engineering person who is working on the label.
5.4.2 Engineering Labels for Optical Fibers
These labels are affixed to the optical fibers that connect the optical interfaces on the boards in a chassis, or on the device boxes. There are two types of labels for optical cables: l One is for the fiber that connects the optical interfaces on two devices.
l The other is for the fiber that connects the device and the ODF.
Labels for the Optical Fibers Connecting Devices
Meaning of the Label
lists information on both sides of the labels affixed to the optical fibers that connect two devices.
Table 5-22 Information on labels affixed to the fibers between two devices
Content
MN-B-C-D-
R/T
Meaning
MN: cabinet number
Example
M: The cabinet rows from front to back are numbered from A to Z.
N: The cabinet columns from left to right are numbered from 01 to 99.
For example, A01 is the cabinet in row A and column
01.
B: chassis number
C: physical slot number
Numbered in bottom-up order with two digits, for example, 01.
Numbered in top-down and left-right order starting from 01. For example, 01 is the first slot at the top left of the chassis.
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Content Meaning
D: optical interface number.
R: Receiving interface
T: optical transmitting interface
-
Example
Numbered in top-down and left-right order, consistent with the port sequence number on the device.
Example of the Label
Figure 5-89 shows a sample label on an optical fiber.
Figure 5-89 Sample label on an optical fiber between two devices
T
A01 01 05 01 R
01 01 01 G01
TO:
The meaning of the label is listed in
l "A01-01-05-01-R" indicates that the local end of the optical fiber is connected to the optical receiving interface 01 in slot 5, chassis 01 in the cabinet in row A, column 01 in the machine room.
l "G01-01-01-01-T" indicates that the opposite end of the optical fiber is connected with optical transmitting interface 01 in slot 01, chassis 01 in the cabinet in row G, column 01 in the machine room.
Labels for the Optical Fibers Connecting the Device and an ODF
Meaning of the Labels
shows information on both sides of labels attached to an optical fiber between a device and an optical distribution frame (ODF).
Table 5-23 Information on labels affixed to a fiber between a device and an ODF
Content Meaning Example
MN-B-C-D-
R/T
MN: cabinet number
For example, A01.
B: chassis number
Numbered in bottom-up order with two digits, for example, 01.
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Content Meaning
C: physical slot number
Example
Numbered in top-down and left-right order starting from 01. For example, 01 is the first slot at the top left of the chassis.
Numbered in top-down and left-right order, consistent with the port sequence number on the device.
D: optical interface number.
R: Optical receiving interface
T: optical transmitting interface
MN: row number and column number of an ODF
-
ODF-MN-B-
C-R/T
M: The cabinet rows from front to back are numbered from A to Z.
N: The cabinet columns from left to right are numbered from 01 to 99.
For example, G01 is the ODF of row G and column
01.
Range from 01 to 99, for example, 01-01.
B: row number of the terminal device
C: column number of the terminal device
R: Optical receiving interface
T: optical transmitting interface
-
Example of the Label
Figure 5-90 shows a sample label on an optical fiber.
Figure 5-90 Sample label on an optical fiber between the device and the ODF
ODF G01 01 01 R
R 01 05 01 A01
TO:
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Meaning of the label in Figure 5-90
l "ODF-G01-01-01-R" indicates that the local end of the optical fiber is connected to the optical receiving terminal in row 01, column 01 of the ODF in row G, column 01 in the machine room.
l "A01-01-05-01-R" indicates that the opposite end of the optical fiber is connected to optical receiving interface 1 in slot 05, chassis 01 in the cabinet in row A, column 01 in the machine room.
5.4.3 Engineering Labels for Network Cables
Applicable Ranges
The labels can be applied to Ethernet cables.
Label Content
shows the information on both sides of the labels affixed to Ethernet cables.
You can also decide the label content based on the actual environment. If the device is not installed in the cabinet, for example, you can remove the cabinet number.
Table 5-24 Information on the Ethernet cables
Content Meaning Example
MN-B-C-D For example, A01 is the first cabinet in row A.
MN-Z
MN: cabinet number
B: chassis number
C: physical slot number
D: network port number
Numbered in bottom-up order with two digits, for example, 01.
Numbered with two digits in top-down and leftright order. For example, 01.
Numbered in top-down and left-right orders. For example, 01.
For example, B02 is the second cabinet in row B.
MN: cabinet number
Z: Location number
Fill in the location number of the terminal device on site. If the cable is connected to a device in a cabinet, specify the serial numbers of the cabinet, the chassis, and the Ethernet interface of the device.
For example, B02-03-12. If the cable is connected to the Network Management Station (NMS), specify the specific location of the NMS.
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The contents of the labels for network cables connecting hubs and devices or agents and the network cables for other purposes should be specified according to actual connections. The details are as follows:
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Hardware Installation and Maintenance Guide 5 Appendix l For a network cable connecting a hub and device, the label on the hub end should indicate the numbers of the chassis and cabinet where the hub resides, and the serial number on the hub. The label on the device end should indicate the number of the chassis and cabinet where the device is located. If the device is a standalone device, provide the specific position of the device.
l For a network cable connecting a hub and an agent or terminal, the label on the agent or terminal end should contain the serial number of the network interface. The definitions of the cabinet number and chassis number are the same as those described in
l If the hub is a standalone device without a cabinet or chassis, the label should contain specific location information that identifies the hub.
The serial number on the hub, the network interface number of the agent or terminal, and the location of the standalone device should be specified according to actual connections.
Label Example
Figure 5-91 shows a sample label on an Ethernet cable.
Figure 5-91 Sample label on an Ethernet cable
A01 03 01 01
01 03 B02
TO:
Meaning of the label in Figure 5-91 .
l "A01-03-01-01" indicates that one end of the network cable is connected to network interface 01 in slot 01, chassis 03 of the cabinet in row A, column 01 in the equipment room.
l "B02-03-01" indicates that another end of the network cable is connected to network interface 01 in chassis 03 of the cabinet on row B, column 02 in the equipment room. No slot number is given.
5.4.4 Engineering Labels for User Cables
Attach labels to both ends of a user cable to indicate the locations of the cable on the device and main distribution frame (MDF).
Meaning of the Engineering Labels for User Cables
shows the contents of the labels.
Table 5-25 Contents of the engineering labels for user cables
Content Meaning Example
MN-B-C-D MN: cabinet number
For example, A01 is the first cabinet in row A.
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Content Meaning Example
B: frame number Numbered in the bottom-up order with two digits, for example, 03.
C: physical slot number
D: cable number
Numbered with two digits in top-down and leftright order. For example, 01.
Numbered with two digits in top-down and leftright order. For example, 01.
MDF-MN-B-C MN: row number and column number of the
MDF
M: The rows of cabinets from front to back are numbered from A to Z. N: The columns of cabinets from left to right are numbered from 01 to 99. For example, G01 is the MDF of Row G and Column
01.
Ranges from 01 to 99, for example, 01-01.
B: row number of the terminal device
C: column number of the terminal device
Example of the Label
Figure 5-92 shows a sample label on a user cable.
Figure 5-92 Sample label on a user cable
A01 03 01 01
01 01 G01 MDF
TO:
The meaning of the label in Figure 5-92
is as follows: l "A01-03-01-01" indicates that the local end of the user cable is connected to port 1 in slot 1, chassis 03 of the cabinet in row A, column 01 in the equipment room.
l "MDF-G01-01-01" indicates that the opposite end of the user cable is connected to the terminal in row 01, column 01 of the MDF in row G, column 01 in the equipment room.
5.4.5 Engineering Labels for Power Cables
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Engineering Labels for DC Power Cables
These labels are affixed to the DC power cables that provide power supply for cabinets, including the -48 V, PGND, and BGND cables. Here, the DC power cables also include power cables and PGND cables.
The labels for DC power cables are affixed to one side of the identification plates on cable
ties. For details of the labels, see Table 5-26 .
Table 5-26 Contents of the label
Content Meaning
MN(BC)-
B--48Vn
MN(BC)-B-
BGND
MN(BC)-B-
PGND
MN(BC): BC is written right under MN.
B: chassis number, numbered in bottom-up order with two digits, for example, 01.
N: power socket number, numbered as 1 to 3 in the bottom-up and leftto-right orders.
On the loaded cabinet side, only MN is used to identify the cabinet.
On the power cabinet side, MN identifies the row and column number of the power distribution equipment like a control cabinet and distribution box, and BC identifies the row and column number of the
-48 V connector. If there is no row number or column number, or the connector can be identified without them, BC can be omitted. It is unnecessary to identify the row and column number for BGND and
PGND.
The label only carries location information about the destination direction of the power cable whereas information about the local end is unnecessary. That is, the label only carries location
information about the opposite equipment, the control cabinet, or the distribution box. Table
lists the information on two -48 V power supplies on the label. The information on other
DC voltages, such as 24 V and 60 V should be given in similar methods.
Make sure that labels are affixed in the correct direction. That is, after the cable ties are bundled onto the cable, the identification plates with the labels should face up, and the text on the labels in the same cabinet should be in the same direction. For details, see
Figure 5-93 Example of the labels for DC power cables
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The meaning of the label in Figure 5-93
is as follows: l On the loaded cabinet side, the label "A01/B08--48V2" on the cable indicates that the cable is -48 V DC supply, which is from the eighth connector in row B of -48 V bus bar in the cabinet in row A, and column 1 in the equipment room.
l On the distribution box side, the label "B03--48V2" indicates that the cable is -48 V DC supply, connected to DC power socket 2 in row B, column 03 in the equipment room.
NOTE
In the power distribution box or the first power cabinet of a row in a transmission equipment room, every terminal block on the -48 V connector bar has a numeric identification. For example, in the above label of "A01/B08--48V2", "08" (or sometimes "8") is the numeric identification of the terminal block.
PGND and BGND are two copper bars, on which the terminal blocks are short-circuited.
Therefore, it makes no difference which terminal is connected to them. It is only necessary to give the row and column of the power distribution box, instead of giving the specific serial number of the terminal block on the copper bar. For example, if the label on the loaded cabinet side is "A01-BGND", it means that the power cable is a BGND that connects BGND copper bar in the power distribution box in row A, column 01 in the machine room.
Information on the labels for PGND cables should be given in a similar way.
Engineering Labels for AC Power Cables
These labels are affixed to both ends of an AC power cable that provides AC power supply to cabinets, including 110/220 V, PGND, and BGND cables. The 110/220 V AC cables and related PGND and BGND cables are covered with an insulating sheath, so the labels need to contain only the word "AC" and the cabinet numbers.
The labels for AC power cables are affixed to one side of the identification plates on cable
ties. For details, see Table 5-27
.
Table 5-27 Label content
Content
MN-(B)-ACn
Meaning
MN: serial number of the cabinet or the socket where the power is led in
B: chassis number, numbered in bottom-up order with two digits, for example, 01.
n: power port number, numbered as 1 to 3 in bottom-up and left-to-right order.
Serial number of the socket where the power is led in: the location of the socket is marked according to the actual situation. If the sockets can be identified by row numbers and column numbers, they can be numbered following the same rule for the cabinets. If the sockets cannot be identified by rows and columns, specify the detailed locations to avoid confusion with other sockets.
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The label only carries location information about the opposite equipment and the power socket; information about the local end is unnecessary.
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Make sure that labels are affixed in the correct direction. That is, after the cable ties are bundled onto the cable, the identification plates with the labels should face up, and the text on
the labels in the same cabinet should be in the same direction, as shown in Figure 5-94
.
Figure 5-94 Labels for AC power cables
Label on the loaded cabinet side
(indicating the position of the cable on the power distribution box)
Label on the distribution box side
(indicating the position of the cable on the loaded cabinet side)
Meaning of the label in Figure 5-94 .
l On the equipment cabinet side, the label marked "A01-AC1" indicates that the power cable is connected to the first AC power socket of row A and column 01 in the equipment room.
l On the power socket side, the label marked "B01-AC1" indicates that the power cable is connected to the first AC power socket in the cabinet of row B and column 01 in the equipment room.
5.5 Guide to Using Optical Modules
Common Faults of an Optical Module
NOTE
The system may fail to obtain information about non-Huawei-certified optical modules or obtain incorrect information. You are advised to use Huawei-certified optical modules. Obtain the electronic label of the optical module and contact technical support personnel to confirm whether it is a Huawei-certified optical module.
1.
An optical module is not completely installed in position.
If the optical module is not completely installed in position and the latch boss is not secured, the device cannot identify the optical module. After the optical module works for a long time, it will be ejected under external stress.
2.
The optical receptacle on an optical module is contaminated.
If an optical module is not cleaned or protected properly, contaminants may accumulate on the fiber pin in the optical module. As a result, the coupling efficiency is reduced, optical signals are cut off, or even worse, the surface of the fiber pin is damaged permanently.
3.
An optical module is burnt.
If high-power optical signals (caused by an optical time domain reflectometer or selfloop test) are transmitted through an optical module that is used for long-distance transmission but no optical attenuator is used, the optical power will exceed the overload power of the avalanche photodiode (APD). Then the optical module is burnt.
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The preceding faults lead to temporary or long-term cut-off of optical signals; or even cause permanent damages to the optical module, affecting communication services.
Measures to Prevent a Loosened Optical Module
1.
When installing an optical module, insert it in position. If you hear a click or feel a slight shake, it indicates that the latch boss is secured.
If the latch boss is not secured, the gold finger of the optical module is not in good contact with the connector on the board. In this case, the link may be connected but optical signals will be cut off or the optical module will be loosened when the optical module is shaken or hit.
2.
Figure 5-95 shows the release handle on an optical module when it is open and closed.
When inserting the optical module, make sure that the release handle is closed. At this time, the latch boss locks the optical module. After the optical module is inserted, try pulling it out to see if it is installed in position. If the optical module cannot be pulled out, it is secured.
Figure 5-95 State of the release handle
Close the release handle Open the release handle
Measures to Prevent Receptacle Contamination
1.
Cleaning tissues must be prepared on site. You need to clean the optical connector before inserting it in the receptacle. This protects the receptacle against contamination on the surface of the optical connector.
Figure 5-96 Cleaning optical fibers with special cleaning tissues
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NOTE
Place at least three cleaning tissues on the work bench. As shown in
, wipe the end of an optical connector from left to right or from right to left on a cleaning tissue, and then move the connector end to the unused part of the cleaning tissue to continue.
2.
Cover an unused optical module with a protective cap to prevent dust, as shown in
Figure 5-97 Installing a protective cap
If no protective cap is available, use fibers to protect the optical module, as shown in
Figure 5-98 Using fibers to protect an optical module
3.
Cover unused optical connectors with protective caps, as shown in Figure 5-99 , and then
lay out fibers on the fiber rack or coil them in a fiber management tray to prevent fibers from being squeezed.
Figure 5-99 Installing a protective cap on a fiber
Issue 01 (2016-09-30)
4.
If a receptacle or an optical connector has not been used for a long time and is not covered with a protective cap, you need to clean it before using it. Clean a receptacle
with a cotton swab, as shown in Figure 5-100
. Clean an optical connector with cleaning tissues.
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Figure 5-100 Cleaning a receptacle with a cotton swab
5 Appendix
NOTICE
When cleaning a receptacle, insert the cotton swab and turn it slowly in the receptacle.
Do not use too much strength because the receptacle may be damaged.
5.
If optical signals are lost during the operation of a device, use the preceding method to clean the receptacle or the optical connector. In this manner, the possibility of contamination can be excluded.
Measures to Prevent an Optical Module from Being Burnt
1.
Before using an optical time-domain reflectometer (OTDR) to test the connectivity or the attenuation of optical signals, disconnect the optical fibers from the optical module.
Otherwise, the optical module will be burnt.
2.
When performing a self-loop test, use an optical attenuator. Do not loosen the optical connector instead of the optical attenuator.
Precautions
1.
The optical connector should be vertically inserted in the receptacle to avoid damages to the receptacle.
2.
Fibers must be inserted into optical modules of the corresponding type. That is, multimode fibers must be inserted into multimode optical modules, and single mode fibers must be inserted into single mode optical modules. If a fiber is inserted into an optical module of a different mode, faults may occur. For example, optical signals will be lost.
5.6 Fault Tag
*Customer name:
Address:
Contact person:
Tel.: Fax:
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Category*: □ RMA □ Return □ Analysis
BOM
Code
Product
Description
Bar
Code*
Fault
Occurring
Date*
Reasons for Repairing (Category No.):
Description of the Fault
Phenomena*
Category
No.*
Category No. includes the following eight types:
F001 - Wear out damaged (◊ In warranty Period ◊ Out of warranty period)
F002 - Deployment damaged
F003 - Intransit damaged
F004 - Version upgrade
F005 - Batch replace
F007 - Overdue spare parts inspecting
F008 - Others
F011 - Running circumstance change
Note: l For optical interface cards returned, the optical interfaces should be covered with protection caps.
l In general, the analysis card will not be returned to you. If you have any special requirements, please contact Huawei.
l One Fault Tag should be adapted in one return category, such as RMA/Return/Analysis.
l The items marked with "*" are the mandatory fields that you must fill in.
Software
Version*
5.7 Installation Checklist
Com pone nt
AC
No.
1
Applic able
Scope
Indepen dent AC
Check Item
The air vent of the device is free from blockage to ensure normal heat dissipation.
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Com pone nt
PoE power supply
No.
2
3
4
5
6
7
8
9
1
2
3
4
5
6
7
5 Appendix
Applic able
Scope
Indepen dent AC
Indepen dent AC
Indepen dent AC
Check Item
The power modules are securely installed with their captive screws tightly fixed.
Four rubber pads are attached to specified positions on the bottom of the AC before it is placed on a desk.
The AC is secured in the cabinet or rack by rack-mounting brackets or guide rails (or trays), and floating nuts are correctly secured.
AC card
AC card
AC card
General
General
The AC card is secured in the cabinet or rack by guide rails or trays, and the guide rails or trays and floating nuts are correctly secured.
The AC card is correctly inserted into the device slot and secured using the ejector lever.
No pins on the backplane are bent when the AC card is installed.
Indepen dent AC
Indepen dent AC
General
General
The AC is grounded using a ground cable, meeting surge protection requirements.
When the AC directly connects to APs, location IDs of the
APs are provided at the cable connection points.
The proper PoE switch or power adapter is selected, meeting
AP power supply and onsite environment requirements.
To ensure that the PoE power meets requirements, the PoE power supply device and APs must be connected through
CAT5E and CAT6E network cables, and the cable length cannot exceed 100 m.
General
General
Labels must be made for the PoE power cable to identify AP locations.
Leave a 20 cm space between PoE power adapters to ensure normal heat dissipation.
General The PoE switch is correctly grounded with the ground cable.
Reserve a few downlink network interfaces for the PoE switch (for example, connect at most 20 APs to a 24-port switch) for future capacity expansion.
You are advised to configure dual power modules for a PoE switch for power redundancy backup and providing power for more APs.
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AP
No.
1
2
3
4
5
6
7
8
9
5 Appendix
Applic able
Scope
Check Item
General
General
General
General
General
Indoor
AP
Indoor
AP
Outdoor
AP
General
The AP installation positions comply with the network planning report and APs cannot be installed in environments with strong electrical or magnetic interference or corrosive materials. If the onsite environment does not meet requirements, adjust the AP installation positions properly.
The devices are installed correctly, securely, without damages or paint peeling. Screws are tightened.
Leave at least 20 cm space at the cable outlet and top
(convex) of the AP to facilitate commissioning, maintenance, and heat dissipation. APs that dissipate heat from the rear must be fixed using mounting brackets in wall mounting scenarios. Ensure that there is a certain space between the
APs and wall to facilitate heat dissipation.
APs with built-in antennas should be installed in open areas and there should be no obvious obstruction in the coverage direction of the main lobe. The main lobe of built-in antennas faces the top (convex).
The APs and antennas are neatly installed, without affecting the overall layout of the environment.
Indoor APs are placed far away from windows and in dry environments with little dust and good ventilation. There should be no inflammable materials in rooms. The indoor temperature and humidity must be within acceptable ranges.
When being mounted to a ceiling, the APs must be fixed using the matching mounting brackets. The APs cannot be hung in the air or placed directly on the ceiling. When the
APs are mounted to a wall, the bottom of the APs should be at least 30 mm from the ground. The APs should be installed in places out of reach of people.
When two or more APs are installed in the same area, they must be installed in the same vertical or horizontal line with certain spacing greater than 15 mm.
Dustproof, waterproof, and anti-theft measures are taken and the devices are kept clean. The APs are secured using the security locks (separately purchased) based on onsite situations and customer requirements. If APs are placed in a network box, ensure that the box is well-ventilated, clean, and dustless, and the ventilation holes are not blocked.
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Com pone nt
No.
Signal cable
10
11
12
13
14
15
16
17
18
1
2
3
Applic able
Scope
Check Item
Indoor
AP
Outdoor
AP
General
General
Indoor
AP
General
Indoor APs should be mounted on walls with network ports downwards to prevent device damages caused by water drops or other liquid. Install the device in a site that is free from leaking or dripping water, heavy dew, and humidity, and take protective measures to prevent water from flowing into the equipment along the cable.
When an outdoor AP is installed against a wall or pole, keep the indicator downwards for easy observation.
Use waterproof labels to mark the registration names of APs on the AC, as well as their channels and IP addresses. The lables should be attached to the front of the APs for easy observation.
Record AP installation positions, MAC addresses, interfaces of uplink PoE switches, and IP addresses (APs use fixed IP addresses) into a table.
The devices required during indoor AP installation, such as the splitter, coupler, and antennas are operated in accordance with specifications.
The APs using a metal shell (with a ground point) must be properly grounded.
Outdoor
AP
Unused radio ports should be installed with 50 Ω RF loads.
Outdoor
AP
Outdoor
AP
General
General
General
Take lightning protection measures on outdoor APs (the outdoor APs have built-in 5 kV surge protectors. If customers require a higher surge protection capability on the feeder ports, they can purchase additional surge protective devices, which need to be separately grounded). The APs should be located in the protection scope (within a 45-degree angle) of a lightning rod.
When an AP is mounted to a pole, the distance between the
AP and the top of pole should be at least 30 cm.
Routes of signal cables comply with the engineering design document. The signal cables are correctly connected to facilitate maintenance and capacity expansion.
Radio ports of an AP are correctly connected to radio ports
A/B/C of antennas.
Signal cable connectors are correctly installed and securely connected to the device. Wires of each signal cable are securely cramped in the connectors and pass connectivity tests.
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Com pone nt
No.
4
5
6
7
8
9
10
Applic able
Scope
Check Item
General
General
Indoor
AP
Outdoor
AP
General
General
General
Signal cables are orderly routed and not crossed, twisted, or winded (cables can be crossed at 1 m out of the cabinet). The bend radius of cables meets requirements, and the cables are not excessively bent.
Signal cables are not damaged or broken and have no splices.
Sufficient cable length is reserved. The reserved cables are twined and placed properly to facilitate subsequent maintenance.
The optical, power, network, and feeder cables are bundled using straps (one strap every 0.5 m) and securely fastened.
The signal cables shall be bundled at even intervals (about
1000 mm), not too tight or too loose. The cables shall be bundled properly with cable ties placed in neat order. Cut off redundant cable ties and remove burrs from them to avoid injuries. The cables shall be fixed using fasteners or ageingresistant outdoor metal binding straps.
Keep the signal cables away from heat sources and use heat insulation materials to insulate the cables from the heat sources. Do not place signal cables on the air vents of the cabinet to avoid affecting subrack heat dissipation or cable lifetime.
Pigtail layout should meet the following requirements: l Pigtails are not strained or twisted at the bent parts. They are bundled by binding tape with appropriate force.
l Pigtails can be pulled back and forth easily inside the cable tie and are not bent at a right angle.
l Pigtails are not squeezed by other cables or objects.
l The flange must be fixed.
l Pigtails are protected with protective tubes or enveloped in troughs when they are routed outside the cabinet. The protective tubes are bundled and processed to prevent cutting.
l The optical fiber cannot be folded or twisted, and the pigtail cannot be squeezed. The binding diameter of an optical fiber must be larger than 6 cm.
l The pigtail connection points must be clean and dustless.
Fiber connectors and optical ports that are not used must be protected with protective caps or plugs. Cleaning must be carried out in strict accordance with Huawei tool specifications.
The feeder cables shall not be bent or twisted, with no copper wire exposed.
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Com pone nt
No.
11
12
13
14
15
16
17
18
19
20
Applic able
Scope
Check Item
General
General
General
General
Outdoor
AP
Outdoor
AP
General
Outdoor
AP
Outdoor
AP
The feeder cable connectors comply with corresponding standards and are correctly connected, without looseness.
The feeder cables, power splitter, coupler, and surge protective devices are connected correctly and reliably in accordance with specifications.
Strong current and weak current cables are routed separately.
The power cables, ground cables, and signal cables are bundled and routed separately (with a spacing of more than
30 mm) to prevent electrical or magnetic interference. Use shielded cables in places with strong interference.
When routing cables in walls, place the cables in the cable troughs or pipes and fix the cables using pipe straps. For nonmetal corrugated pipes, the fixing distance should be about
1000 mm.
All outdoor connectors or feeder cable connectors are properly sealed to prevent water. Wrap the cable using onelayer PVC insulation tape, three-layer waterproof tape, and then three-layer PVC insulation tape. The tape shall be attached evenly and neatly. The network cables shall be covered with waterproof PG tubes.
Cable connectors are secured on cables and sealed to prevent water intrusion. The outlets of cable conduits on a wall are sealed by waterproof and flame-retardant materials. Drip loops meeting the minimum bending radius requirement are made on the network cable segment that stretches indoor.
Outdoor
AP
Do not deploy cables overhead between two buildings.
Waterproof labels (providing device names and cable directions) are filled and attached to signal cables correctly.
Each label is attached 20 mm to 100 mm from the corresponding cable connector.
Surge protection measures are taken in the places where the outdoor APs are installed. The outdoor APs, antennas, and signal cables are deployed within 45-degree protection area of a lightning rod.
The bare wires of network and feeder cables should be covered by the winding pipes, flexible metal conduit, PVC pipes, or galvanization pipes. The cable outlet and inlet are sealed to prevent dusts.
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Anten na
No.
1
2
3
4
5
6
7
8
9
5 Appendix
Applic able
Scope
Check Item
General
General
General
General
Outdoor antenna
Outdoor antenna
Outdoor antenna
Outdoor antenna
Outdoor antenna
The installation positions of antennas should comply with the engineering design and antennas should be securely and reliably installed.
There should be no obstacles in the major coverage direction of antennas. The direction and downlink tilt of antennas should be adjusted based on the coverage targets.
There should not be metal subjects within 1 m around an outdoor omnidirectional antenna.
The azimuth deviation of a directional antenna should be within 5 degrees and the tilt deviation within 0.5 degree.
The antennas are fixed using special support that supports installation of surge protection devices and shall be located within a 45 degree protection angle of a lightning rod. When an antenna is mounted to a pole, the distance between the antenna and top of the pole should be at least 30 cm.
Take waterproof measures on connectors of the antennas and feeder cables and keep the drain holes of antennas downwards.
The pole used in antenna mounting should meet the following requirements:
Pole height: ≥ 2000 mm
Bottom pole diameter: ≥ 220 mm
Top pole diameter: ≥ 120 mm
Pole thickness: ≥ 6 mm
Depth of foundation: ≥ 1500 mm
The pole deployed outdoors must be reinforced with hot-dip zinc to prevent water corrosion and rust.
It is recommended that at most three APs or antennas be mounted to the same pole. The APs or antennas mounted to the same pole should meet the following requirements: l The vertical distance should be at least 3.5 m between adjacent 2.4G antennas and 2 m between adjacent 5G antennas.
l There should be at least 1 m vertical distance between antennas that work on the same frequency band and belong to different APs.
When outdoor APs use single-polarized antennas, the horizontal distance between 2.4G antennas should be at least
1 m and that between 5G antennas should be at least 0.5 m.
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Com pone nt
No.
Power and groun d cables
Optica l modul e
1
2
3
10
4
5
6
7
8
9
10
11
1
Applic able
Scope
Check Item
Outdoor antenna
If multiple APs are mounted to different poles, the APs should provide signal coverage in the same direction or in back-to-back mode to ensure that main lobe of antennas on different APs do not face each other.
Recommended AP distance:
≥ 44 m (APs provide signal coverage in the same direction)
≥ 6 m (APs provide distance in back-to-back mode)
General
The female connectors of power cables connecting to the device are fixed using a locking latch.
General The power cables and ground cables are correctly connected.
General
General
General
General
The power cables and ground cables are complete and not spliced.
The excess of power cables or ground cables are trimmed off without any coils. The power cables connecting the delivered surge protection boxes and devices cannot be cut. These power cables can be coiled.
Power cables and ground cable are separated from the signal cables.
Power cables and ground cables are routed straightly and properly bundled, with sufficient slack at the bend part. If the cables are fixed on a sharp mechanical part, take protection measures.
General
General
General
General
General
General
The equipotential cables between the attaching cabinets shall be securely connected.
The lugs for the power cables and ground cables are soldered or crimped securely.
The lugs and bare wires of power cables and ground cables are tightly wrapped with tubes or insulation tape without any exposed copper wire. Flat washers and spring washers are installed correctly.
Labels are filled and attached to power cables and ground cables correctly.
Power cables deployed outdoors must be covered by PVC tubes.
A single-mode fiber can only be used with a single-mode optical module while a multimode optical fiber can only be used with a multimode optical module. On most optical modules, the fibers of different types cannot be used together.
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Com pone nt
No.
2
3
5 Appendix
Applic able
Scope
Check Item
General
General
The labels of pluggable optical modules are smoothly attached and intact, and cannot be covered by the optical modules.
If a short-distance optical fiber is used for a long-distance optical module, especially in loopback scenarios, use an optical attenuator to prevent the optical module from being burnt.
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Product Description
Issue
Date
01
2016-07-05
HUAWEI TECHNOLOGIES CO., LTD.
Copyright © Huawei Technologies Co., Ltd. 2016. All rights reserved.
No part of this document may be reproduced or transmitted in any form or by any means without prior written consent of Huawei Technologies Co., Ltd.
Trademarks and Permissions
and other Huawei trademarks are trademarks of Huawei Technologies Co., Ltd.
All other trademarks and trade names mentioned in this document are the property of their respective holders.
Notice
The purchased products, services and features are stipulated by the contract made between Huawei and the customer. All or part of the products, services and features described in this document may not be within the purchase scope or the usage scope. Unless otherwise specified in the contract, all statements, information, and recommendations in this document are provided "AS IS" without warranties, guarantees or representations of any kind, either express or implied.
The information in this document is subject to change without notice. Every effort has been made in the preparation of this document to ensure accuracy of the contents, but all statements, information, and recommendations in this document do not constitute a warranty of any kind, express or implied.
Huawei Technologies Co., Ltd.
Address: Huawei Industrial Base
Bantian, Longgang
Shenzhen 518129
People's Republic of China
Website: http://e.huawei.com
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Product Description About This Document
About This Document
Intended Audience
This document describes the positioning, characteristics, hardware structure, product features, and technical specifications of the RU.
This document helps you understand the characteristics and features of the RU.
This document is intended for:
Network planning engineers
Hardware installation engineers
Commissioning engineer
Data configuration engineers
On-site maintenance engineers
Network monitoring engineers
System maintenance engineers
Symbol Conventions
The symbols that may be found in this document are defined as follows.
Symbol Description
Indicates an imminently hazardous situation which, if not avoided, will result in death or serious injury.
Indicates a potentially hazardous situation which, if not avoided, could result in death or serious injury.
Indicates a potentially hazardous situation which, if not avoided, may result in minor or moderate injury.
Indicates a potentially hazardous situation which, if not avoided, could result in equipment damage, data loss, performance deterioration, or unanticipated results.
NOTICE is used to address practices not
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R250D&R250D-E
Product Description
Symbol
About This Document
Description related to personal injury.
Calls attention to important information, best practices and tips.
NOTE is used to address information not related to personal injury, equipment damage, and environment deterioration.
Change History
Changes between document issues are cumulative. The latest document issue contains all the changes made in previous issues.
Changes in Issue 01 (2016-07-05)
This is the initial commercial release.
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Product Description Contents
Contents
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R250D&R250D-E
Product Description 1 Product Positioning and Characteristics
1
Product Positioning and Characteristics
1.1 Product Positioning
Product Overview
The R250D and R250D-E are remote units (RUs) used in Huawei agile distributed Wi-Fi solution. They support PoE power supply, and are deployed indoors and connected to the central AP. The central AP and RUs are connected through network cables, which greatly extends the coverage range, enhances flexibility in AP deployment and planning, and reduces the engineering construction costs. The central AP manages the RUs and processes services in a centralized manner. The RUs process radio signals independently. Such distributed architecture further improves the wireless access capability, creating optimal service experience for users.
The RU uses an 86 mm plate in compliance with international standards and can be easily installed into a junction box in a room. It is equipped with a built-in antenna and a hidden indicator; therefore, installation of the RU does not affect indoor decorations and designs. It also has an IEEE 802.11a/b/g/n/ac/ac wave2 wireless module and can work on both 5 GHz and 2.4 GHz frequency bands.
The RU is recommended for environments with complex wall structures and high-density rooms, such as schools, hotels, hospitals, and office meeting rooms. Signals are transmitted through network cables without attenuation. The RUs are deployed indoors and provide comprehensive signal coverage.
The RUs are managed by the central AP. The central AP and RUs are plug-and-play and can be managed and maintained in real time. Compared with traditional distributed AP solutions, the AC in Huawei agile distributed Wi-Fi solution needs to manage a smaller number of APs.
A large number of RUs can be deployed, which improves the overall performance and reduces network deployment costs.
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R250D&R250D-E
Product Description
Usage Scenario
Figure 1-1
Distributed wireless access
1 Product Positioning and Characteristics
As shown in the figure, the downlink GE interfaces of the central AP support PoE power supply and can be directly connected to RUs. The central AP can connect to more RUs through a PoE switch. RUs are deployed indoors and communicate with the central AP through network cables.
1.2 Product Characteristics
Long-Distance Network Coverage
Unlike the traditional distributed AP which allows for a maximum feeder length of 15 m, the central AP uses network cables to replace feeder cables and supports up to 100 m distance from the RUs. The network coverage range is therefore expanded by several times.
No Wall Penetration Loss, No Coverage Hole
Restricted by feeder length or installation requirements, signals have to pass through walls in some scenarios, resulting in large signal attenuation. If rooms to be covered have complex structures, coverage holes may occur. To prevent these problems, lots of calculation and verification work needs to be carried out. Huawei distributed solution solves these problems.
In this solution, RUs are placed in rooms, and signals are transmitted over wired cables, without wall penetration loss, delivering high-quality wireless access services.
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R250D&R250D-E
Product Description 1 Product Positioning and Characteristics
802.11ac/ac wave2 Gigabit Wireless Rate
The RU complies with IEEE 802.11a/b/g/n/ac/ac wave2, supports 2x2 MIMO, works on both
2.4 and 5 GHz frequency bands, and provides strong signals and gigabit wireless rate.
Unique, Graceful Plate Design
The RU is white in appearance and has heat emission holes and interfaces at the side and bottom. The mounting screws are hidden under the slide panel. The overall design is simple but graceful and blends well with the layout of hotels and apartments.
Easy to Install in a Standard 86-type Box
The RU uses an 86 mm plate in compliance with international standards and can be easily installed into a junction box in a room, requiring no drilling or cabling.
Flexible Installation Modes
In addition to an 86-type box, the R250D can be installed on a wall or ceiling, and the
R250D-E can be installed on a desk, rendering the installation location flexible.
Hidden Indicator, Zero Impact on Sleep
The RU uses a hidden indicator design. When being turned on, the indicator has soft light.
The AC controls the switch of the indicator and turns off the indicator at nights to prevent blinking lights from affecting sleep of guests.
Four Downlink Ethernet Interfaces, Supporting Wired Access from Multiple
Users
The R250D-E has four downlink 1000M Ethernet interfaces that can process data concurrently. The interfaces can be connected to multiple terminals through network cables, such as the IPTV, desktop computer, and laptop, meeting requirements of hotels and apartments. One downlink 1000M Ethernet interface supports PoE out and can provide power supply for connected devices such as IP phones.
Auto Shutdown of the Wired Interface
In some cases, a loop may occur on a network connected to the RU's wired interface, for example, when the RU and the network are connected through a hub. The auto shutdown function enables the RU to automatically shut down its wired interface for protection.
This function takes effect only when the wired network connected to the RU's wired interface does not terminate STP packets from the RU.
Low Engineering Cost
Compared with traditional distributed APs, the central AP cuts down the following expenses:
Construction: Network cables replace expensive feeder cables. The central AP can directly use the network cables originally routed in the rooms, without the need of deploying new cables.
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Product Description
1 Product Positioning and Characteristics
License: The maximum number of central APs in Fit AP mode allowed by the AC is controlled by licenses, but RUs do not require licenses. Therefore, one central AP can use RUs to cover dozens of rooms.
Hierarchical Processing Technology, High Wireless Forwarding Capability
Huawei distributed solution uses innovative hierarchical processing technology. The central
AP manages RUs in a centralized manner and concurrently forwards service traffic, while the
RUs only process radio signals. The hierarchical design makes the network structure clearer and reduces the processing burden on the central AP and RUs, improving efficiency and optimizing the overall wireless forwarding performance.
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R250D&R250D-E
Product Description 2 Hardware Structure
2
Hardware Structure
2.1 R250D
Appearance
The actual device appearance may be different from the following device appearance; these differences will not affect device functions.
Figure 2-1
R250D appearance
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Product Description
Port
Figure 2-2
R250D ports
2 Hardware Structure
As shown in Figure 2-2, each port can be described as follows:
1.
GE1: 10/100/1000M port: connects to the wired Ethernet.
2.
Default: Reset button used to restore factory settings and restarts the device if you hold down the button more than 3 seconds.
3.
GE0/PoE_IN: 10/100/1000M port: connects to the wired Ethernet and supports PoE input.
The R250D provides only one indicator, as shown in Figure 2-3.
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Product Description
Figure 2-3
Indicator
2 Hardware Structure
The indicator is located inside the panel, which turns on after the AP is powered on.
Indicator colors may vary slightly at different temperature.
Table 2-1
Indicator description
Type
Default status after power-on
Color
Green
Software startup status
Running status
Green
Green
Status
Steady on
Steady on after blinking once
Blinking once every
2s (0.5 Hz)
Description
The AP is just powered on and the software is not started yet.
After the system is reset and starts uploading the software, the indicator blinks green once. Until the software is uploaded and started, the indicator remains steady green.
The system is running properly, the Ethernet connection is normal, and STAs are associated with the AP.
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R250D&R250D-E
Product Description
Type
Alarm
Fault
Color
Green
Red
Status
Blinking once every
5s (0.2 Hz)
Blinking once
Alarm Green every
0.25s (4 Hz)
Steady on
2 Hardware Structure
Description
The system is running properly, the Ethernet connection is normal, and no STA is associated with the AP. The system is in low power consumption state.
The software is being upgraded.
After the software is uploaded and started, the AP working in Fit
AP mode requests to go online on the AC and maintains this state until it goes online successfully on the AC (before the CAPWAP link is established).
The AP registration fails
(the CAPWAP link is disconnected).
A fault that affects services has occurred, such as a
DRAM detection failure or system software loading failure. The fault cannot be automatically rectified and must be rectified manually.
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R250D&R250D-E
Product Description
2.2 R250D-E
Appearance
2 Hardware Structure
The actual device appearance may slightly differ from the following device appearance, but these differences will not affect device functions.
Figure 2-4
AP2050DN-E appearance
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R250D&R250D-E
Product Description
Ports
Figure 2-5
AP2050DN-E ports
2 Hardware Structure
As shown in Figure 2-5, each port can be described as follows:
1.
DC 48V: DC power socket: connects a 48V power adapter to the AP.
2.
USB: Connects to a USB flash drive or other storage devices to extend the storage space of the AP. The USB2.0 standard is supported.
3.
Default: Reset button: restores factory settings and restarts the device if you hold down the button more than 3 seconds.
4.
Pass Through: Connects to a network cable or phone cable for transparent transmission.
5.
GE2 to GE4: 10/100/1000M port: connects to the wired Ethernet.
6.
GE1/PoE_OUT: 10/100/1000M port: connects to the wired Ethernet and supports PoE output.
7.
GE0/PoE_IN: 10/100/1000M port: connects to the wired Ethernet and supports PoE input.
LED Indicator
The R250D-E provides only a single indicator, as shown in Figure 2-6.
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R250D&R250D-E
Product Description
Figure 2-6
Indicator
2 Hardware Structure
The indicator is located inside the panel, which turns on after the AP is powered on.
Indicator colors may vary slightly at different temperature.
Table 2-2
Indicator description
Type Color
Default status after power-on
Green
Software startup status
Running status
Green
Green
Status
Steady on
Steady on after blinking once
Blinking once every
2s (0.5 Hz)
Blinking once every
5s (0.2 Hz)
Description
The AP is just powered on and the software is not started yet.
After the system is reset and starts uploading the software, the indicator blinks green once. Until the software is uploaded and started, the indicator remains steady green.
The system is running properly, the Ethernet connection is normal, and STAs are associated with the AP.
The system is running properly, the Ethernet connection is
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R250D&R250D-E
Product Description
Type
Alarm
Fault
Color
Green
Red
Status
Blinking once
Alarm Green every
0.25s (4 Hz)
Steady on
2 Hardware Structure
Description normal, and no STA is associated with the AP. The system is in low power consumption state.
The software is being upgraded.
After the software is uploaded and started, the AP working in Fit
AP mode requests to go online on the AC and maintains this state until it goes online successfully on the AC (before the CAPWAP link is established).
The AP registration fails
(the CAPWAP link is disconnected).
A fault that affects services has occurred, such as a
DRAM detection failure or system software loading failure. The fault cannot be automatically rectified and must be rectified manually.
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R250D&R250D-E
Product Description 3 Product Features
3
Product Features
3.1 WLAN Features
WLAN features supported by the AP are as follows:
Compliance with IEEE 802.11a/b/g/n/ac/ac Wave 2
Maximum rate of 1.167 Gbit/s
Maximum ratio combining (MRC)
Space time block code (STBC)
Beamforming
MU-MIMO
Low-density parity-check (LDPC)
Maximum-likelihood detection (MLD)
Frame aggregation, including A-MPDU (Tx/Rx) and A-MSDU (Rx only)
802.11 dynamic frequency selection (DFS)
Short guard interval (GI) in 20 MHz, 40 MHz, and 80 MHz modes
Priority mapping and packet scheduling based on a Wi-Fi Multimedia (WMM) profile to implement priority-based data processing and forwarding
Automatic and manual rate adjustment
WLAN channel management and channel rate adjustment
For details about WLAN channel management, see the
Country Code & Channel Compliance Table
.
Automatic channel scanning and interference avoidance
Service set identifier (SSID) hiding
Signal sustain technology (SST)
Unscheduled automatic power save delivery (U-APSD)
Control and Provisioning of Wireless Access Points (CAPWAP)
Automatic login
Extended Service Set (ESS)
Multi-user CAC
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Product Description 3 Product Features
3.2 Network Features
Network features supported by the AP are as follows:
Compliance with IEEE 802.3u
Auto-negotiation of the rate and duplex mode and automatic switchover between the
Media Dependent Interface (MDI) and Media Dependent Interface Crossover (MDI-X)
Compliance with IEEE 802.1q
SSID-based VLAN assignment
VLAN trunk on uplink Ethernet ports
Management channel of the AP uplink port in tagged and untagged mode
DHCP client, obtaining IP addresses through DHCP
Tunnel data forwarding and direct data forwarding
STA isolation in the same VLAN
Access control lists (ACLs)
Link Layer Discovery Protocol (LLDP)
Uninterrupted service forwarding upon CAPWAP channel disconnection
Unified authentication on the AC
AC dual-link backup
IPv6
3.3 QoS Features
QoS features supported by the AP are as follows:
Priority mapping and packet scheduling based on a Wi-Fi Multimedia (WMM) profile to implement priority-based data processing and forwarding
WMM parameter management for each radio
WMM power saving
Priority mapping for upstream packets and flow-based mapping for downstream packets
Queue mapping and scheduling
User-based bandwidth limiting
Adaptive bandwidth management (automatic bandwidth adjustment based on the user quantity and radio environment) to improve user experience
Airtime scheduling
3.4 Security Features
Security features supported by the AP are as follows:
Open system authentication
WEP authentication/encryption using a 64-bit, 128-bit, or 152-bit encryption key
WPA/WPA2-PSK authentication and encryption (WPA/WPA2 personal edition)
WPA/WPA2-802.1x authentication and encryption (WPA/WPA2 enterprise edition)
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Product Description
3 Product Features
WPA-WPA2 hybrid authentication
WAPI authentication and encryption
Wireless intrusion detection system (WIDS) and wireless intrusion prevention system
(WIPS), including rogue device detection and countermeasure, attack detection and dynamic blacklist, and STA/AP blacklist and whitelist
802.1x authentication, MAC address authentication, and Portal authentication
DHCP snooping
Dynamic ARP Inspection (DAI)
IP Source Guard (IPSG)
3.5 Maintenance Features
Maintenance features supported by the AP are as follows:
Unified management and maintenance on the AC
Automatic login and configuration loading, and plug-and-play (PnP)
Batch upgrade
Telnet
STelnet using SSH v2
Real-time configuration monitoring and fast fault location using the NMS
System status alarm
3.6 BYOD
BYOD features supported by the AP are as follows:
Identifies the device type according to the organizationally unique identifier (OUI) in the
MAC address.
Identifies the device type according to the user agent (UA) information in an HTTP packet.
Identifies the device type according to DHCP options.
The RADIUS server delivers packet forwarding, security, and QoS policies according to the device type carried in the RADIUS authentication and accounting packets.
3.7 Locating Service
The AP supports the locating service only in Fit AP mode.
Locating service features supported by the AP are as follows:
Locates tags manufactured by AeroScout or Ekahau.
Locates Wi-Fi terminals.
Works with eSight to locate rogue devices.
The R250D-E supports Bluetooth location.
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Product Description 3 Product Features
3.8 Spectrum Analysis
Spectrum analysis features supported by the AP are as follows:
Identifies interference sources such as baby monitors, Bluetooth devices, digital cordless phones (at 2.4 GHz frequency band only), wireless audio transmitters (at both the 2.4
GHz and 5 GHz frequency bands), wireless game controllers, and microwaves.
Works with eSight to locate and perform spectrum analysis on interference sources.
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Product Description 4 Technical Specifications
4
Technical Specifications
4.1 Basic Specifications
Table 4-1
R250D Basic specifications
Item
Physical specifications
Power specifications
Environment specifications
Dimensions (H x
W x D)
Weight
IP rating
Atmospheric pressure
Description
26 mm x 86 mm x 120 mm
0.2 kg
System memory
256 MB DDR3L
32MB Flash
Power input
Maximum power consumption
PoE power supply: in compliance with IEEE
802.3af/at
10.1 W
NOTE
The actual maximum power consumption depends on local laws and regulations.
Operating temperature
-60 m to +1800 m: 0°C to +40°C
1800 m to 5000 m: Temperature decreases by
1°C every time the altitude increases 300 m.
-40°C to +70°C Storage temperature
Operating humidity
5% to 95% (non-condensing)
IP20
53 kPa to 106 kPa
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Product Description 4 Technical Specifications
Table 4-2
R250D-E Basic specifications
Item
Physical specifications
Power specifications
Environment specifications
Dimensions (H x
W x D)
Weight 0.26kg
System memory
256MB DDR3L
32MB FLASH
Power input
DC:48V±5%
PoE power supply: in compliance with IEEE
802.3af/at
Maximum power consumption
Operating temperature
Storage temperature
Operating humidity
IP rating
Atmospheric pressure
Description
36mm x 86mm x 140mm
11.5 W (excluding the output power of the USB port and PoE_OUT port)
NOTE
The actual maximum power consumption depends on local laws and regulations.
-60 m to +1800 m: 0°C to +40°C
1800 m to 5000 m: Temperature decreases by
1°C every time the altitude increases 300 m.
-40°C to +70°C
5% to 95% (non-condensing)
IP20
53 kPa to 106 kPa
4.2 Radio Specifications (R250D)
Table 4-3
Radio specifications
Item
Antenna type
Antenna gain
Description
Built-in antenna
2.4 GHz: 4 dBi(Typical)
5 GHz: 6 dBi(Typical)
≤256 Maximum number of concurrent users
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Product Description 4 Technical Specifications
Item
Maximum number of
VAPs for each radio
Maximum transmit power
Description
16
2.4 GHz: 21 dBm (combined power)
5 GHz: 20 dBm (combined power)
NOTE
The actual transmit power depends on local laws and regulations.
You can adjust the transmit power from the maximum transmit power to 1 dBm, with a step of 1 dB.
Maximum number of non-overlap ping channels
2.4 GHz
802.11b/g
20 MHz: 3
802.11n
20 MHz: 3
40 MHz: 1
5 GHz
802.11a
−
20 MHz:
13
802.11n
−
−
20 MHz:
13
40 MHz:
6
802.11ac
−
20 MHz:
13
−
−
40 MHz:
6
80 MHz:
3
NOTE
The table uses the number of non-overlapping channels supported by
China as an example. The number of non-overlapping channels varies in different countries. For details, see the
Country Codes & Channels Compliance
.
Channel rate
802.11b: 1, 2, 5.5, and 11 Mbit/s
802.11a/g: 6, 9, 12, 18, 24, 36, 48, and 54 Mbit/s
802.11n: 6.5 to 300 Mbit/s
802.11ac: 6.5 to 867 Mbit/s
Receiver sensitivity
(Typical values)
2.4 GHz
802.11b
-99 dBm @ 1
Mbit/s
-97 dBm @ 2
Mbit/s
-95 dBm @
5.5 Mbit/s
-92 dBm @
11 Mbit/s
2.4 GHz
802.11g
-94 dBm @ 6
Mbit/s
-93 dBm @ 9
Mbit/s
-90 dBm @
12 Mbit/s
-89 dBm @
18 Mbit/s
-85 dBm @
24 Mbit/s
-84 dBm @
2.4 GHz
802.11n (HT20)
-93 dBm @
MCS0
-89 dBm @
MCS1
-87 dBm @
MCS2
-85 dBm @
MCS3
-82 dBm @
MCS4
-78 dBm @
2.4 GHz
802.11n(HT40)
-91 dBm @
MCS0
-88 dBm @
MCS1
-85 dBm @
MCS2
-83 dBm @
MCS3
-80 dBm @
MCS4
-76 dBm @
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Product Description
Item
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Description
36 Mbit/s
-79 dBm @
48 Mbit/s
-78 dBm @
54 Mbit/s
5 GHz
802.11a
-91 dBm @ 6
Mbit/s
-91 dBm @ 9
Mbit/s
-89 dBm @
12 Mbit/s
-88 dBm @
18 Mbit/s
-85 dBm @
24 Mbit/s
-82 dBm @
36 Mbit/s
-77 dBm @
48 Mbit/s
-76 dBm @
54 Mbit/s
5 GHz
802.11n (HT20)
-91 dBm @
MCS0
-88 dBm @
MCS1
-87 dBm @
MCS2
-84 dBm @
MCS3
-80 dBm @
MCS4
-76 dBm @
MCS5
-74 dBm @
MCS6
-72 dBm @
MCS7
-89 dBm @
MCS8
-86 dBm @
MCS9
-85 dBm @
MCS10
MCS5
-76 dBm @
MCS6
-74 dBm @
MCS7
-91 dBm @
MCS8
-87 dBm @
MCS9
-85 dBm @
MCS10
-83 dBm @
MCS11
-80 dBm @
MCS12
-76 dBm @
MCS13
-74 dBm @
MCS14
-72 dBm @
MCS15
5 GHz
802.11n (HT40)
-88 dBm @
MCS0
-86 dBm @
MCS1
-82 dBm @
MCS2
-80 dBm @
MCS3
-77 dBm @
MCS4
-73 dBm @
MCS5
-71 dBm @
MCS6
-69 dBm @
MCS7
-86 dBm @
MCS8
-84 dBm @
MCS9
-80 dBm @
MCS10
MCS5
-75 dBm @
MCS6
-72 dBm @
MCS7
-89 dBm @
MCS8
-86 dBm @
MCS9
-83 dBm @
MCS10
-81 dBm @
MCS11
-78 dBm @
MCS12
-74 dBm @
MCS13
-73 dBm @
MCS14
-70 dBm @
MCS15
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Item
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Description
5 GHz
802.11ac
(VHT20)
-91 dBm @
MCS0NSS1
-88 dBm @
MCS1NSS1
-87 dBm @
MCS2NSS1
-83 dBm @
MCS3NSS1
-80 dBm @
MCS4NSS1
-76 dBm @
MCS5NSS1
-74 dBm @
MCS6NSS1
-72 dBm @
MCS7NSS1
-69 dBm @
MCS8NSS1
-89 dBm @
MCS0NSS2
-86 dBm @
MCS1NSS2
-85 dBm @
MCS2NSS2
-81 dBm @
MCS3NSS2
-78 dBm @
MCS4NSS2
-74 dBm @
MCS5NSS2
-72 dBm @
MCS6NSS2
-82 dBm @
MCS11
-78 dBm @
MCS12
-74 dBm @
MCS13
-72 dBm @
MCS14
-70 dBm @
MCS15
5 GHz
802.11ac
(VHT40)
-88 dBm @
MCS0NSS1
-85 dBm @
MCS1NSS1
-82 dBm @
MCS2NSS1
-80 dBm @
MCS3NSS1
-77 dBm @
MCS4NSS1
-73 dBm @
MCS5NSS1
-71 dBm @
MCS6NSS1
-69 dBm @
MCS7NSS1
-66 dBm @
MCS8NSS1
-64 dBm @
MCS9NSS1
-86 dBm @
MCS0NSS2
-83 dBm @
MCS1NSS2
-80 dBm @
MCS2NSS2
-78 dBm @
MCS3NSS2
-75 dBm @
MCS4NSS2
-71 dBm @
MCS5NSS2
-78 dBm @
MCS11
-75 dBm @
MCS12
-71 dBm @
MCS13
-69 dBm @
MCS14
-67 dBm @
MCS15
5 GHz
802.11ac
(VHT80)
-85 dBm @
MCS0NSS1
-82 dBm @
MCS1NSS1
-79 dBm @
MCS2NSS1
-77 dBm @
MCS3NSS1
-74 dBm @
MCS4NSS1
-70 dBm @
MCS5NSS1
-68 dBm @
MCS6NSS1
-67 dBm @
MCS7NSS1
-62 dBm @
MCS8NSS1
-61 dBm @
MCS9NSS1
-83 dBm @
MCS0NSS2
-80 dBm @
MCS1NSS2
-77 dBm @
MCS2NSS2
-75 dBm @
MCS3NSS2
-72 dBm @
MCS4NSS2
-68 dBm @
MCS5NSS2
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Item
4 Technical Specifications
Description
-70 dBm @
MCS7NSS2
-67 dBm @
MCS8NSS2
-69 dBm @
MCS6NSS2
-67 dBm @
MCS7NSS2
-64 dBm @
MCS8NSS2
-62 dBm @
MCS9NSS2
-66 dBm @
MCS6NSS2
-65 dBm @
MCS7NSS2
-60 dBm @
MCS8NSS2
-59 dBm @
MCS9NSS2
4.3 Radio Specifications (R250D-E)
Table 4-4
Radio specifications
Item
Antenna type
Antenna gain
Description
Built-in antenna
2.4 GHz: 4 dBi(Typical)
5 GHz: 5 dBi(Typical)
≤256 Maximum number of concurrent users
Maximum number of
VAPs for each radio
Maximum transmit power
16
Maximum number of non-overlap ping channels
2.4 GHz: 21 dBm (combined power)
5 GHz: 20 dBm (combined power)
NOTE
The actual transmit power depends on local laws and regulations.
You can adjust the transmit power from the maximum transmit power to 1 dBm, with a step of 1 dB.
2.4 GHz
802.11b/g
20 MHz: 3
802.11n
20 MHz: 3
40 MHz: 1
5 GHz
802.11a
−
20 MHz:
13
802.11n
−
−
20 MHz:
13
40 MHz:
NOTE
The table uses the number of non-overlapping channels supported by
China as an example. The number of non-overlapping channels varies in different countries. For details, see the
Country Codes & Channels Compliance
.
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Product Description
Item Description
6
802.11ac
−
20 MHz:
13
−
−
40 MHz:
6
80 MHz:
3
Channel rate
802.11b: 1, 2, 5.5, and 11 Mbit/s
802.11a/g: 6, 9, 12, 18, 24, 36, 48, and 54 Mbit/s
802.11n: 6.5 to 300 Mbit/s
802.11ac: 6.5 to 867 Mbit/s
4 Technical Specifications
Receiver sensitivity
(Typical values)
2.4 GHz
802.11b
-97 dBm @ 1
Mbit/s
-95 dBm @ 2
Mbit/s
-94 dBm @
5.5 Mbit/s
-91 dBm @
11 Mbit/s
2.4 GHz
802.11g
-93 dBm @ 6
Mbit/s
-92 dBm @ 9
Mbit/s
-90 dBm @
12 Mbit/s
-89 dBm @
18 Mbit/s
-87 dBm @
24 Mbit/s
-84 dBm @
36 Mbit/s
-80 dBm @
48 Mbit/s
-78 dBm @
54 Mbit/s
-74 dBm @
MCS7
-91 dBm @
MCS8
-87 dBm @
MCS9
-86 dBm @
MCS10
-83 dBm @
MCS11
-80 dBm @
MCS12
-76 dBm @
MCS13
-74 dBm @
MCS14
2.4 GHz
802.11n (HT20)
-93 dBm @
MCS0
-89 dBm @
MCS1
-88 dBm @
MCS2
-85 dBm @
MCS3
-82 dBm @
MCS4
-78 dBm @
MCS5
-76 dBm @
MCS6
-73 dBm @
MCS7
-88 dBm @
MCS8
-85 dBm @
MCS9
-84 dBm @
MCS10
-81 dBm @
MCS11
-77 dBm @
MCS12
-73 dBm @
MCS13
-72 dBm @
MCS14
2.4 GHz
802.11n(HT40)
-90 dBm @
MCS0
-87 dBm @
MCS1
-86 dBm @
MCS2
-83 dBm @
MCS3
-79 dBm @
MCS4
-75 dBm @
MCS5
-74 dBm @
MCS6
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Item
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Description
5 GHz
802.11a
-93 dBm @ 6
Mbit/s
-92 dBm @ 9
Mbit/s
-90 dBm @
12 Mbit/s
-89 dBm @
18 Mbit/s
-87 dBm @
24 Mbit/s
-82 dBm @
36 Mbit/s
-79 dBm @
48 Mbit/s
-77 dBm @
54 Mbit/s
5 GHz
802.11ac
(VHT20)
-92 dBm @
MCS0NSS1
-90 dBm @
MCS1NSS1
-87 dBm @
MCS2NSS1
-90 dBm @
MCS8
-88 dBm @
MCS9
-86 dBm @
MCS10
-83 dBm @
MCS11
-79 dBm @
MCS12
-75 dBm @
MCS13
-73 dBm @
MCS14
-72 dBm @
MCS15
5 GHz
802.11n (HT20)
-92 dBm @
MCS0
-90 dBm @
MCS1
-88 dBm @
MCS2
-85 dBm @
MCS3
-81 dBm @
MCS4
-77 dBm @
MCS5
-75 dBm @
MCS6
-74 dBm @
MCS7
5 GHz
802.11ac
(VHT40)
-90 dBm @
MCS0NSS1
-87 dBm @
MCS1NSS1
-85 dBm @
MCS2NSS1
-72 dBm @
MCS15
-87 dBm @
MCS8
-85 dBm @
MCS9
-83 dBm @
MCS10
-80 dBm @
MCS11
-77 dBm @
MCS12
-73 dBm @
MCS13
-71 dBm @
MCS14
-70 dBm @
MCS15
5 GHz
802.11n (HT40)
-89 dBm @
MCS0
-87 dBm @
MCS1
-85 dBm @
MCS2
-82 dBm @
MCS3
-79 dBm @
MCS4
-75 dBm @
MCS5
-73 dBm @
MCS6
-72 dBm @
MCS7
5 GHz
802.11ac
(VHT80)
-86 dBm @
MCS0NSS1
-83 dBm @
MCS1NSS1
-81 dBm @
MCS2NSS1
-71 dBm @
MCS15
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4 Technical Specifications
Description
-84 dBm @
MCS3NSS1
-81 dBm @
MCS4NSS1
-77 dBm @
MCS5NSS1
-75 dBm @
MCS6NSS1
-73 dBm @
MCS7NSS1
-69 dBm @
MCS8NSS1
-90 dBm @
MCS0NSS2
-90 dBm @
MCS1NSS2
-88 dBm @
MCS2NSS2
-85 dBm @
MCS3NSS2
-82 dBm @
MCS4NSS2
-79 dBm @
MCS5NSS2
-75 dBm @
MCS6NSS2
-73 dBm @
MCS7NSS2
-71 dBm @
MCS8NSS2
-81 dBm @
MCS3NSS1
-78 dBm @
MCS4NSS1
-74 dBm @
MCS5NSS1
-73 dBm @
MCS6NSS1
-71 dBm @
MCS7NSS1
-67 dBm @
MCS8NSS1
-65 dBm @
MCS9NSS1
-88 dBm @
MCS0NSS2
-85 dBm @
MCS1NSS2
-83 dBm @
MCS2NSS2
-79 dBm @
MCS3NSS2
-76 dBm @
MCS4NSS2
-72 dBm @
MCS5NSS2
-71 dBm @
MCS6NSS2
-69 dBm @
MCS7NSS2
-65 dBm @
MCS8NSS2
-63 dBm @
MCS9NSS2
-79 dBm @
MCS3NSS1
-76 dBm @
MCS4NSS1
-71 dBm @
MCS5NSS1
-70 dBm @
MCS6NSS1
-68 dBm @
MCS7NSS1
-65 dBm @
MCS8NSS1
-62 dBm @
MCS9NSS1
-84 dBm @
MCS0NSS2
-81 dBm @
MCS1NSS2
-79 dBm @
MCS2NSS2
-77 dBm @
MCS3NSS2
-74 dBm @
MCS4NSS2
-69 dBm @
MCS5NSS2
-68 dBm @
MCS6NSS2
-66 dBm @
MCS7NSS2
-63 dBm @
MCS8NSS2
-60 dBm @
MCS9NSS2
4.4 Standards Compliance
Safety standards
UL 60950–1
IEC 60950–1
EN 60950–1
GB 4943
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R250D&R250D-E
Product Description
Radio standards
ETSI EN 300 328
ETSI EN 301 893
FCC Part 15C: 15.247
FCC Part 15C: 15.407
RSS-210
AS/NZS 4268
EMC standards
EN 301 489–1
EN 301 489–17
ETSI EN 60601-1-2
FCC Part 15
ICES-003
YD/T 1312.2-2004
ITU k.21
GB 9254
GB 17625.1
EN 55022
EN 55024
CISPR 22
CISPR 24
IEC61000-4-6
IEC61000-4-2
IEEE standards
IEEE 802.11a/b/g
IEEE 802.11n
IEEE 802.11ac
IEEE 802.11h
IEEE 802.11d
IEEE 802.11e
4 Technical Specifications
Security Standards
802.11i, Wi-Fi Protected Access 2 (WPA2), and WPA
802.1X
Advanced Encryption Standards (AES) and Temporal Key Integrity Protocol (TKIP)
EAP Type (s)
Environment Standards
ETSI 300 019-2-1
ETSI 300 019-2-2
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R250D&R250D-E
Product Description
ETSI 300 019-2-3
ETSI 300 019-1-1
ETSI 300 019-1-2
ETSI 300 019-1-3
EMF
CENELEC EN 62311
CENELEC EN 50385
RSS-102
FCC Part1&2
FCC KDB
RoHS
Directive 2002/95/EC & 2011/65/EU
4 Technical Specifications
Reach
Regulation 1907/2006/EC
WEEE
Directive 2002/96/EC & 2012/19/EU
FCC Statement
This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:
—Reorient or relocate the receiving antenna.
—Increase the separation between the equipment and receiver.
—Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
—Consult the dealer or an experienced radio/TV technician for help.
FCC Radiation Exposure Statement
This device complies with FCC radiation exposure limits set forth for an uncontrolled environment and it also complies with Part 15 of the FCC RF Rules. This equipment must be installed and operated in accordance with provided instructions and the antenna(s) used for this transmitter must be installed to provide a separation distance of at least 20 cm from all persons and must not be co-located or operating in conjunction with any other antenna or transmitter. End-users and installers must be provide with antenna installation instructions and consider removing the no-collocation statement.
This device complies with Part 15 of the FCC Rules. Operation is subject to the
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R250D&R250D-E
Product Description 4 Technical Specifications following two conditions: (1) this device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation.
Caution!
Any changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment.
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28
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