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DH-PFM Wireless Equipment
User’s Manual
V1.0.0
ZHEJIANG DAHUA VISION TECHNOLOGY CO.,LTD.
Legal Statement
Copyrights
© 2017 ZHEJIANG DAHUA VISION TECHNOLOGY CO.,LTD.. All rights reserved.
Any or full contents of the user’s manual cannot be copied, transmitted, distributed or stored, partially or wholly, by any means, without the prior written approval of ZHEJIANG DAHUA
VISION TECHNOLOGY CO.,LTD. (hereinafter “Dahua”).
Dahua or a third party may reserve the right of the product described in this user’s manual.
Without the prior written approval of the corresponding party, any person cannot copy, distribute, amend, abstract, reverse compile, disassemble, decode, reverse engineering, rent, transfer or sub-license the software.
Trademark
, , and are trademarks or registered trademarks of the Dahua in various jurisdictions. Other trademarks and company names mentioned herein are the properties of their respective owners.
Update and Revision
In order to enhance the product safety and provide you with better user experience, Dahua may improve the product via software auto update, but Dahua doesn't need to inform in advance and isn't liable to any responsibility.
Dahua reserves the right to revise any information in this document at any time; the revised contents will be added into the new version without further notice. There may be minor differences in some product functions after it is updated.
I
Cybersecurity Statement and Recommendations
Cybersecurity Statement
You are responsible for the risks resulting from connecting your product to the internet, including but not limited to, cyber-attacks, hacking attacks, computer viruses and malware, etc. Please protect your data and personal information by taking necessary actions, such as changing the default password and using a strong combination, changing your password periodically, keeping your firmware up-to-date, etc. Dahua is not responsible for any dysfunction, information leakage or other problems caused by failure to take necessary precautions to secure your devices. We will provide product maintenance services.
To the extent not prohibited by applicable laws, Dahua and its employees, licensees, and affiliates are not liable for personal injury, or any incidental, special, indirect, or consequential damages whatsoever, including, without limitation, damages for loss of profits, corruption or loss of data, failure to transmit or receive any data, business interruption, or any other commercial damages or losses arising out of or related to the use or inability to use its products or services, however caused, regardless of the theory of liability (contract, tort or otherwise), even if it has been advised of the possibility of such damages. Some jurisdictions do not allow the exclusion or limitation of liability for personal injury, or of incidental or consequential damages, so this limitation may not apply to you.
In no event shall liability for all damages (other than as may be required by applicable laws in cases involving personal injury) exceed the amount paid for products or services.
Cybersecurity Recommendations
Mandatory actions to be taken towards cybersecurity
1. Change Passwords and Use Strong Passwords:
The number one reason systems get “hacked” is due to having weak or default passwords.
Dahua recommends changing default passwords immediately and choosing a strong password whenever possible. A strong password should be made up of at least 8 characters and a combination of special characters, numbers, and upper and lower case letters.
2. Update Firmware
As is standard procedure in the tech-industry, we recommend keeping NVR, DVR, and IP camera firmware up-to-date to ensure the system is current with the latest security patches and fixes.
Check the firmware release of your running devices. If the firmware release date is over 18 months old, please contact a Dahua authorized local distributor or Dahua technical support for available update releases.
II
“Nice to have” recommendations to improve your network security
1. Change Passwords Regularly
Regularly change the credentials to your devices to help ensure that only authorized users are able to access the system.
2. Change Default HTTP and TCP Ports:
● Change default HTTP and TCP ports for Dahua systems. These are the two ports used to communicate and to view video feeds remotely.
● These ports can be changed to any set of numbers between 1025-65535. Avoiding the default ports reduces the risk of outsiders being able to guess which ports you are using.
3. Enable HTTPS/SSL:
Set up an SSL Certificate to enable HTTPS. This will encrypt all communication between your devices and recorder.
4. Enable IP Filter:
Enabling your IP filter will prevent everyone, except those with specified IP addresses, from accessing the system.
5. Change ONVIF Password:
On older IP Camera firmware, the ONVIF password does not change when you change the system’s credentials. You will need to either update the camera’s firmware to the latest revision or manually change the ONVIF password.
6. Forward Only Ports You Need:
● Only forward the HTTP and TCP ports that you need to use. Do not forward a huge range of numbers to the device. Do not DMZ the device's IP address.
● You do not need to forward any ports for individual cameras if they are all connected to a recorder on site; just the NVR is needed.
7. Disable Auto-Login on SmartPSS:
Those using SmartPSS to view their system and on a computer that is used by multiple people should disable auto-login. This adds a layer of security to prevent users without the appropriate credentials from accessing the system.
8. Use a Different Username and Password for SmartPSS:
In the event that your social media, bank, email, etc. account is compromised, you would not want someone collecting those passwords and trying them out on your video surveillance system. Using a different username and password for your security system will make it more difficult for someone to guess their way into your system.
9. Limit Features of Guest Accounts:
III
If your system is set up for multiple users, ensure that each user only has rights to features and functions they need to use to perform their job.
10. UPnP:
● UPnP will automatically try to forward ports in your router or modem. Normally this would be a good thing. However, if your system automatically forwards the ports and you leave the credentials defaulted, you may end up with unwanted visitors.
● If you manually forwarded the HTTP and TCP ports in your router/modem, this feature should be turned off regardless. Disabling UPnP is recommended when the function is not used in real applications.
11. SNMP:
Disable SNMP if you are not using it. If you are using SNMP, you should do so only temporarily, for tracing and testing purposes only.
12. Multicast:
Multicast is used to share video streams between two recorders. Currently there are no known issues involving Multicast, but if you are not using this feature, deactivation can enhance your network security.
13. Check the Log:
If you suspect that someone has gained unauthorized access to your system, you can check the system log. The system log will show you which IP addresses were used to login to your system and what was accessed.
14. Physically Lock Down the Device:
Ideally, you want to prevent any unauthorized physical access to your system. The best way to achieve this is to install the recorder in a lockbox, locking server rack, or in a room that is behind a lock and key.
15. Connect IP Cameras to the PoE Ports on the Back of an NVR:
Cameras connected to the PoE ports on the back of an NVR are isolated from the outside world and cannot be accessed directly.
16. Isolate NVR and IP Camera Network
The network your NVR and IP camera resides on should not be the same network as your public computer network. This will prevent any visitors or unwanted guests from getting access to the same network the security system needs in order to function properly.
For latest information about Dahua cybersecurity statement and recommendations, please visit www.dahuasecurity.com.
IV
Preface
Overview
This document elaborates installation, configuration and use of DH-PFM wireless equipment.
Symbol Definition
The following symbols may appear in the document. Please refer to the table below for the respective definition.
Symbol Note
It means highly potential danger. It will cause severe injury or casualties if it fails to avoid.
It means moderate or low potential danger. It may cause slight or moderate injury if it fails to avoid.
It means potential risk. It may cause device damage, data loss, weaker performance or other unpredictable consequences if it fails to avoid.
It means that it can help you to solve a problem or save your time.
It means the additional information, which is the emphasis and supplement of the main body.
V
Important Safeguards and Warnings
Before use, please read the following requirements carefully and conform to them strictly, in order to prevent danger and property loss.
Please transport, use and store this product under allowed temperature and humidity.
Please don’t expose the product to direct sunlight or close to a heating source.
Please don’t place the product at humid, dusty or fuliginous places.
Please install the product at well-ventilated places. Prohibit blocking its air vent.
Please install the product at flat and stable places.
Please don’t drip or splash liquids onto the product.
Please don’t put other things onto the product.
Please don’t dismantle the product arbitrarily.
Please use recommended power line within rated specifications.
Special Announcement
This manual is for reference only. Please refer to the actual product for more details.
This manual will be regularly updated according to product changes, and the updated contents will be added into the new version without prior announcement.
Please contact Customer Service Department of this company for the latest program and supplementary instructions.
The user shall undertake any losses resulting from violation of guidance in the manual.
Regarding possible doubts or disputes in the manual, final explanations of the company shall prevail.
VI
Table of Contents
VII
Description
Table 1 Release Note
Version Release Date
1.0 2014-05-12 Create
Revised Chapter cl
Author
Aim of Manual
This manual mainly enables users to get familiar with DH-PFM88X, helps users to use it and solve some common problems when necessary. This manual mainly involves
DH-PFM88X hardware information, WEB page parameters, configuration mode, networking mode and fault analysis, so as to effectively help users to know and use the equipment quickly, and shorten the time for users to know DH-PFM series products.
Table 2 Definition of Nouns and Description of Abbreviations
No.
1
2
3
4
Definition or
Abbreviation
DH-PFM880
DH-PFM881
DH-S4200-24T
DH-S4000-7X
Description
AP local side
CPE client
Indoor switch without fan
Outdoor quasi-industrial switch with wide temperature range
VIII
1
Product Overview
DH-PFM88X series equipment owns unique built-in TDMA wireless technology. This technology combines advanced core technologies in the industry, and boasts features such as long transmission distance, high throughput and strong anti-interference performance.
TDMA technology includes TDMA, flexible configuration of 5M/10M/20M/40MHz bandwidth, rate control and ACK overtime automatic adjustment technologies. TDMA effectively solves hidden node problem that perplexes large point-to-multipoint WLAN. Flexible configuration of 5M/10M/20M/40MHz bandwidth realizes balance between scarce wireless bandwidth resource and complicated working scenes. With advanced rate control algorithm, adapt to channel quality changes quickly while keeping stable rate as far as possible. ACK overtime automatic adjustment technology detects the distance between access point and client automatically, adjusts wireless parameters and optimizes the equipment performance.
DH-PFM881 maximum point-to-point transmission distance reaches 3km and maximum transmission rate reaches 300Mbps. With excellent remote transmission performance, its throughput rate reaches 40Mbps (open space) at 3km and multi-channel HD video can be transmitted. AP equipment supports point-to-point and point-to-multipoint remote access wireless mode; CPE supports point-to-point remote access mode.
1.1
Product Overview
With a small body, DH-PFM88X boasts the most advanced design technology in the industry, wireless transmission effect comparable to base station, and high cost performance advantage.
The equipment adopts unique TDMA wireless technology, integrates advanced TDMA, MIMO and
Multi-hop technologies, innovative compatibility and improved 802.11n protocol, and thus guarantees long distance, throughput rate and anti-interference performance of wireless transmission. Compared to products of other manufacturers, DH-PFM88X series wireless equipment owns the following advantages:
1. Integrate TDMA Technology
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DH-PFM88X owns TDMA operating system and integrates with TDMA technology, which effectively solves hidden node problem that perplexes large point-to-multipoint WLAN. With advanced rate control algorithm, adapt to channel quality changes quickly while keeping stable rate as far as possible, so it is very suitable for remote wireless transmission. By solving remote point-to-multipoint access issue, access quantity increases, rate allocation becomes more uniform, and it can be applied to operator and wireless surveillance fields.
As a wireless equipment operating system redeveloped on the basis of kernel, TDMA is more suitable for wireless video surveillance data transmission.
2. Integrate Watchdog
DH-PFM88X integrates hardware watchdog to monitor system operation all the time. In case of abnormal system operation, watchdog resets and reboots the system, so as to ensure its stability effectively and reduce manual operation.
3. Ping Watchdog Function Carries out Real-time Detection of Link
Ping Watchdog function detects whether the link fails or not, and reboots the equipment immediately when the link fails, so as to ensure link stability.
4. A Lot of Frequency is Provided to the User
At present, most wireless products work at standard 802.11 5.8G frequency, but standard 5.8G frequency band is relatively scarce. When 5.8G equipment is used a lot, it is easily interfered.
DH-PFM88X increases support for frequency near 5.8G and expands working frequency to
4920MHz-6100MHz within allowed range. Since some frequencies face less interference, clients and access points in these frequency bands work better than other frequency bands. DH-PFM88X supports for non-standard frequency band has reduced external interference to wireless product, enhanced its throughput rate effectively and satisfied users’ requirements for relatively high bandwidth.
Before using these non-standard frequency bands, please confirm whether they conform to local laws, regulations and radio management stipulations.
5. Adapt to Complicated and Changing Working Environment
2
DH-PFM88X is able to work in complicated and changing environment: working temperature ranges from -30 ℃ to 70 ℃ , while working humidity ranges from 5% to 95%. DH-PFM88X keeps relatively high throughput rate in all kinds of harsh environment for a long time, such as thunderstorm, high temperature and high humidity, low temperature and low humidity.
1.2
Overview of TDMA Technology
At present, most remote Wi-Fi network bridge products have developed from 802.11 WLAN technology. Built-in TDMA operating system integrates TDMA, flexible configuration of
5M/10M/20M/40MHz bandwidth, rate control and ACK overtime automatic adjustment technologies, and it is known as an ideal remote Wi-Fi access product. TDMA effectively solves hidden node problem that perplexes large point-to-multipoint WLAN. Flexible configuration of 5M/10M/20M/40MHz bandwidth realizes balance between scarce wireless bandwidth resource and complicated working scenes: narrow wireless bandwidth configuration is used when there are less idle wireless channels and single user doesn’t place a high requirement on wireless access rate; wide wireless bandwidth configuration is used when there are many idle wireless channels and single user places a high requirement on wireless access rate. Moreover, narrow wireless bandwidth configuration is more effective in sheltered environment. With advanced rate control algorithm, adapt to channel quality changes quickly while keeping stable rate as far as possible, so it is very suitable for remote wireless transmission. ACK overtime automatic adjustment technology detects the distance between access point and client automatically, adjusts wireless parameters and optimizes the equipment performance.
Before AP enables TDMA, client shall set a priority. When one AP connects multiple clients and different clients place different requirements on bandwidth, priority shall be set according to bandwidth requirements of client on present equipment. In case of high bandwidth requirements, it is suggested that the priority should be set to be high; on the contrary, the priority should be set to be low. Of course, if all clients place the same requirements on bandwidth, priority of all clients can be the same
TDMA function can be enabled by AP; client can set its own priority. Other manufacturers’ TDMA cannot intercommunicate with our TDMA.
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1.3
Technical Features
1) Integrate TDMA and effectively enhance “point-to-multipoint” overall performance.
2) Support client priority setting and better deploy every client in case of point-to-multipoint.
3) Support Ping Watchdog and real-time monitoring of wireless link; reboot the equipment automatically when wireless link disconnects, and thus ensure its stability.
4) Support outdoor high temperature and low temperature: -30-70°; quasi-industrial design, waterproof IP66 grade.
5) Recommended wireless coverage range is 3km.
6) Lightning protection of radio frequency port reaches 15KV ESD.
7) Support automatic distance measurement function; display straight-line distance between client and base station in a real-time way.
8) Support automatic rebooting and restoration function of the equipment.
9) Full-band support: frequency spreading supports 4920 ～ 6100Mhz.
10) Support flow control; control input/output flow of base station/client effectively.
11) Support VLAN division, realize VLAN function and control broadcast storm.
12) Support 802.1x authentication method, ensure client access control effectively and provide access security.
13) Support multi-channel selection (5M/10M/20M/40M); promote anti-interference and penetrating power effectively.
14) Support 4 working modes: AP, Station, AP-WDS and Station-WDS.
15) Unique design of antenna radio-frequency amplifier and low-noise receiver guarantees remote video, audio and data transmission.
16) Human-oriented working mode wizard configuration is convenient for those who are not wireless professionals.
17) POE power supply supports international 802.3af standard, and becomes more convenient and
4
reliable.
18) Support IP login, carry out remote control and management via webpage, and thus facilitate configuration.
19) Waterproof ultraviolet-proof shell ensures that the equipment works stably outdoors.
1.4
Equipment Kit
No.
1
2
3
4
5
6
DH-PFM880
Host*1
Antenna*1
Feeder*2
POE power supplier (24V/0.5A)*1
Instruction book
Other installation packages
Table 1-1 Packing List
DH-PFM881
Host*1
N/A
Cable tie *2
POE power supplier (24V/0.5A)*1
Instruction book
Other installation packages
1.5
Application Range
First-choice recommendation: safe town, safe construction site, safe scenic area, elevator IP HD wireless video surveillance.
Secondary recommendation: unblocked scenes such as playground, pasture and suburb crossroad.
5
1.6
Hardware Profile
Hardware Index
CPU/Baseband Radio
Memory
Physical Interface
LED Indicator Light
Power Supply
Atheros AR9344
64MB DRAM, 8MB Flash
2×10/100M Base-TX (Cat. 5/5E, RJ-45) network interface
Power, LAN, WLAN, 3×Link Quality
POE, Power Adapter 24V/0.5A
Table 1-2 Hardware Information
Description of LED Mechanism
DH-PFM88X adopts LED to display present working status and connecting quality, so users know its present working condition visually without logging onto the webpage. LED mainly consists of two parts, equipment status and connecting quality. The first LED in the left is power indicator light, the second one in the left is network indicator light and the third one is connection indicator light. The first one to the third one in the right is signal strength indicator light.
LED
LAN
POWER
WLAN
Signal Strength
Figure 1-1 LED Indicator Light on DH-PFM881 Shell
Color
Green
Green
Green
Red
Yellow
Green
Status
When this light turns on, it means that
DH-PFM88X is connected with power supply.
When this light turns on, it means that
DH-PFM88X LAN port is connected with external equipment.
When this light turns on, it means that
DH-PFM88X wireless is enabled.
When this light flickers, it means that equipment wireless is enabled, and data is wirelessly transmitted.
Indicator light shows signal strength.
Green light means high signal strength.
Yellow light means medium signal strength.
Red light means very weak signal or no signal.
Table 1-3 LED Information
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2.1
Equipment Installation
2
Product Installation
Figure 2-1 DH-PFM88X Overall Installation Diagram
DH-PFM88X line connection type differs under different network modes. Since its default setting is network bridge mode, this chapter mainly describes line connection type of network bridge mode. For connection type of route mode, please refer to Chapter 7 Route Mode of Network Setting.
7
Figure 2-2 DH-PFM880 Installation Diagram
Figure 2-3 DH-PFM881 Installation Diagram
8
2.2
Description of Equipment Line Connection
Figure 2-4 DH-PFM88X Interface Connection Diagram
Type
DH-PFM880
Interface
DH-PFM881 Two RJ45 interfaces
One RJ45 interface
Interface Name
POE
LAN2
None
Connection and Function
Connect “POE” on POE power supply with twisted pair cable; provide
DH-PFM881 equipment with 24V power supply and data transmission.
As “LAN” interface, it can connect IP
Camera. Any LAN port can be used for equipment debugging.
Connect “POE” interface on POE power supply with network cable; provide DH-PFM880 equipment with
24V power supply and data transmission. “LAN” interface on POE power supply connects a switch or other equipment, and serves as a debugging interface.
Table 2-1 Description of Port Connection
2.3
Restore Factory Defaults
If the user forgets DH-PFM88X IP, choose manual operation: press Reset key for 5-10s and release it after all LED turn on, when the equipment has restored factory defaults. Meanwhile, the network interface, which owns a direct connection with DH-PFM88X host, displays 2 continuous connections and disconnections.
9
Item
IP Address
User Name
Password
Wireless Mode
Encryption Type
Network Mode
Figure 2-5 Restore Factory Defaults
Factory Defaults
192.168.1.36 admin admin
Client
WPA->WPA2->CCMP->secret key: 1234567890abc
Network bridge mode
Table 2-2 Factory Defaults of Main Parameters
At network management page of the equipment (System Settings), click “Restore” and restore factory
defaults. Factory parameters are shown in Table 2-2 Factory Defaults of Main Parameters.
10
3
Common Networking
3.1
Wireless Point-to-point
During point-to-point communications, one DH-PFM881 is usually set to be an access point, while the other DH-PFM881 equipment is the client. Actual connection diagram is as follows.
Figure 3-1 Networking Diagram of Access Point and Client
1. At Network Settings Page->Network Mode, both DH-PFM88X equipment shall be set to network bridge mode; firewall is prohibited in both equipment; they have different LAN IP.
2. At Wireless Page, wireless mode shall be set to be access point and client respectively. AP and client have the same SSID, the same encryption way and password. For example,
WPA->WPA2->CCMP->1234567890. Output power is set to be 13dBm, AP frequency is 5.785GHz, whereas channel width of AP and client is 20MHZ.
3. Caution: directions of AP and client shall be opposite.
4. One computer pings the other computer. That is to say, input ping xxx.xxx.xxx.xxx (IP of the other computer) on one computer.
Expected result: after AP and client are connected, computers of AP and client can ping with each other.
Meanwhile, connection quantity is 1 on AP status display page.
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3.2
Wireless Point-to-multipoint
During point-to-multipoint communications, DH-PFM880 is usually set to be an access point (single
AP covers 90 degrees and 4 AP cover 360 degrees), while other DH-PFM881 equipment shall be client.
Actual connection diagram is as follows.
Figure 3-2 Point-to-multipoint Networking Diagram
1. At Network Settings Page->Network Mode, all DH-PFM88X equipment shall be set to network bridge mode; firewall is prohibited (which is disenabled by default) in all equipment; they have different LAN IP.
2. At Wireless Page, wireless mode shall be set to be access point and client respectively. AP and client have the same SSID, the same encryption way and password. For example,
WPA->WPA2->CCMP->1234567890. It is suggested that configuration should be completed according to equipment wizard.
3. Caution: directions of AP and client shall be opposite.
4. One computer pings the other computer. That is to say, input ping xxx.xxx.xxx.xxx (IP of the other computer) on one computer.
Expected result: after AP and client are connected, computers of AP and client can ping with each other.
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Meanwhile, connection quantity is N (representing the quantity of connected clients) on AP status display page.
3.3
Adjustment of Wireless Coverage Dead Angle
When client adopts direct wireless communications with central AP (access point) because surveillance point is blocked seriously, two sets of CPE realize back-to-back connection and carry out angle adjustment. Actual connection diagram is as follows.
Figure 3-3 Networking Diagram of Coverage Dead Angle Adjustment
1. Two back-to-back equipment shall adopt wired connection.
2. Downlink client equipment is set to be access point; uplink central AP equipment is set to be client.
3. For specific configuration of single equipment, please refer to setting wizard configuration.
Network Bridge Equipment Mode
A&B Pairing
C&D Pairing
A
B
C
D
Client
AP
Client
AP
Frequency
(MHz)
Network
Name
Default Dahua1
5745MHz(149) Dahua1
Default Dahua2
5825MHz(165) Dahua2
Password
Dahautech1
Dahautech1
Dahautech2
Dahautech2
Corresponding Table of Pairing Across Network
By default, client doesn’t need to set equipment frequency, but differentiates by network name and password. High-end user can set client input frequency at wireless setting page.
13
4
Status Display
As the first page after the user logs on, status display page shows present configuration of the equipment and real-time monitoring of present working status. It is the 2 nd item of menu bar.
Figure 4-1 Status Display
Item
Name
Function
DH-PFM88X
Firmware
Version
WAN IP
Software version number
Network
Mode
Frequency/
Channel
IP address of WAN port in route mode
Operation mode, route mode or network bridge mode
Communications channel
Wireless
Mode
Client, AP, WDS client, WDS AP and WDS repeater
Distance Distance between interconnected client and AP
Signal As a parameter for client, WDS Link
Item
Kernel
Version
802.11
Mode
Function
V2.1.0.2681.9344
Conform to 802.11 protocol at present
WAN MAC MAC address of WAN port in route mode
Network
Name
Name of wireless network
Channel
Width
Noise
Floor
There are 4 types, including 5M, 10M,
20M and 20/40M AUTO.
Encryption Several encryption methods of wireless network
Interference environment from external
Link connection quality
14
Level client and WDS repeater, it shows overall signal level of client, as well as uplink and downlink signal level of client.
TX/RX Rate As a parameter for client, WDS client and WDS repeater, it shows momentary rate transmitting/receiving present equipment. data of of
Quality
Time It displays time. When NTP client function is enabled, NTP server is set correctly and the equipment is online, the time item will be automatically updated to calibration time on NTP server. If it cannot go online, it has a default value.
Table 4-1 Parameters on Status Display Page
Real-time Monitoring
Throughput rate: also known as throughput capacity, it refers to data size passing every section within unit time. Throughput rate on status display page refers to data size transmitted on the network within unit time. This is a main index to measure network performance. With this index, the user can monitor data transmission speed of the equipment.
Figure 4-2 Throughput Rate
Routes table: it stores the path pointing to network of DH-PFM88X equipment.
Figure 4-3 Routes Table
Bridge table: corresponding relation of MAC address and aging time of equipment whose communication has gone through DH-PFM88X in the past certain period, obtained by DH-PFM88X.
15
Figure 4-4 Bridge Table
ARP table: corresponding relation of IP address and MAC address used by LAN port, whose communication has gone through DH-PFM88X in the past certain period, obtained by the equipment.
Figure 4-5 ARP Table
AP/Client Information Table
When the equipment connects a client in AP mode, it shows client information.
Figure 4-6 Client Information
When the equipment connects an AP in client mode, it shows AP information.
Figure 4-7 AP Information
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5
Setting Wizard
Precondition
Connect the equipment with configuration host and turn on power by reference to Figure 2-4
DH-PFM88X Interface Connection Diagram.
Operating Steps
Step 1 Configure static IP address of “192.168.1.x” segment of host IP address (for example,
192.168.1.180).
Figure 5-1 Host IP
Step 2 In the browser, input default IP address of DH-PFM88X: 192.168.1.36
. The system shows login page.
17
Figure 5-2 Login Page
Step 3 Input username and password (whose default values are admin ), and click “Confirm”.
The system shows status display page, including basic information, such as working status, present settings and software version of DH-PFM88X equipment.
Figure 5-3 Status Display
Step 4 Click “Wizard” in the left, which helps the user to configure the equipment quickly, such as network configuration and wireless mode and so on.
You can click menu in the left of the page, to enter corresponding configuration page.
18
Figure 5-4 Wizard
Step 5 Click “Next” to show basic network parameters. Default configuration is “Network
Bridge Mode”; IP address of LAN port is “192.168.1.36”. It is suggested that the user should modify its IP address immediately after logging onto the equipment.
Equipment IP is unique in the same LAN. Pay attention to modify equipment IP according to design, and ensure that IP in the same LAN doesn’t conflict.
Figure 5-5 Network Setting
19
Step 6 Click “Next” to show basic wireless parameters and wireless encryption options.
The most common two wireless modes of DH-PFM88X equipment are “client” and
“access point”. In the same LAN, local end and client wireless equipment have the same needs for wireless encryption option, network name option and password option.
In “client” mode, equipment connecting video camera is usually set as client mode.
In “access point” mode, local DH-PFM88X equipment is usually set as access point mode, connecting surveillance room.
In case of multiple access points in the same region, pay attention to set different frequencies for different DH-PFM880 equipment; choose one from 8 defined frequencies.
Figure 5-6 Wireless Setting
Step 7 Click “Next” to show working scenario option.
This wizard provides custom scenarios for the user, as is shown in the following figure.
It is suggested that default settings should be used.
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Figure 5-7 Working Scenario
Step 8 Click “Next” to show custom scenarios.
When wireless mode is access point, the user only needs to change channel width to be 40+MHz or 40-MHz, set output power at 27dBm and tick “ACK-Timeout
Adjustment”. Other options remain unchanged.
When wireless mode is client, the user shall set channel at 20/40M, output power at 27dBm and tick “ACK-Timeout Adjustment”. Other options remain unchanged.
Figure 5-8 Custom Scenario
21
Parameter
Name
Parameter Description
Output Power
Channel Width
ACK-Timeout
Adjustment
Distance
The user configures output power of the equipment according to actual working conditions and local laws. The larger the output power is, the farther the wireless transmission distance will be (maximum output power available to the system is 27dBm).
Default value is 20MHz, so as to reach the optimal wireless transmission rate. It is suggested that channel width should be 40+MHz or 40-MHz, so as to enhance wireless transmission quality.
It is suggested that the user should enable “ACK-Timeout Adjustment”. This option tests the distance between two equipment automatically, sets parameters according to this distance and thus optimizes wireless connection quality.
If “ACK-Timeout Adjustment” is enabled, this distance setting becomes invalid; the system will test equipment distance automatically and optimize connection quality. “ACK-Timeout Adjustment” shall be disenabled, so that the distance set by the user takes effect.
Table 5-1 Parameter Description
Step 9 Click “Next” to show “Wizard-Finish” page.
Figure 5-9 Finish Page
Step 10 Click “Change” button to save all settings, and then click “Apply” button, so as to make them take effect.
You can click “Last” to change previous settings.
22
Page of wireless settings is shown as follows:
6
Wireless Settings
Figure 6-1 Wireless Settings
There are 5 wireless modes, including AP mode, CPE/client mode, WDS client mode, WDS AP mode and WDS repeater.
Access Point (AP) mode: a wireless access node can be connected with client equipment, such as computer, mobile phone and wireless bridge etc.. One AP is able to connect with multiple clients.
CPE/Client: it is used with AP. One client only connects with one AP.
WDS Client: equivalent to client, it only connects with WDS AP or WDS repeater. One WDS client only connects with one WDS AP or WDS repeater.
23
WDS AP: it can only be connected with WDS repeater or WDS client. One WDS AP can connect with multiple WDS clients or WDS repeaters.
SSID: this value is used to control access to wireless network. When other equipment connects with this equipment, only those with the same SSID can communicate with each other and build LAN. Click
“Select” key in the right of SSID, search nearby wireless network and connect corresponding wireless network according to your needs.
Frequency: it is center frequency of carrier wave; left and right offset of center frequency is bandwidth.
This parameter shall be set in AP mode, while several frequencies are available in client mode. If AP frequency is not the frequency selected by client, client cannot connect with AP. They can connect with each other only if AP frequency is one frequency selected by client.
Output Power: it refers to output power of wireless signal transmitted by the equipment, to be adjusted according to equipment distance. When output power is increased, the transmitted signal distance and signal strength will be enhanced.
Country Code: different countries or regions have different standard channels, which can be differentiated by country code.
Channel Width: it refers to maximum data transmission rate of channel.
Max. TX Rate: it refers to maximum transmitting and receiving rate of the equipment. By limiting maximum transmitting and receiving rate of the equipment, keep stability of equipment performance.
MAC Address of Root AP: by setting it, client, WDS repeater or WDS client limits the connecting object.
Wireless Encryption: encrypt the wireless connection. The user chooses corresponding encryption type according to safety requirement. Equipment to be associated shall have the same wireless encryption; otherwise, they cannot be associated.
WEP: wired equivalent privacy, a data encryption technique.
WPA: this standard specification strengthens interoperable safety, and enhances data protection and access control level greatly within existing and future WLAN. It operates on existing hardware in the form of software upgrading. Wi-Fi Protected Access originates from and is compatible with future IEEE
802.11i standard. After correct installation, WPA provides Wi-Fi users with high-level protection, always
24
keeps their data under protection and ensures that only authorized network users can visit the network.
WPA makes up all defects of wired equivalent privacy (WEP).
In client mode, DH-PFM88X searches for surrounding 5.8G wireless band, provides basis for setting, avoids interference source effectively and searches for those equipment with access port mode. One client only connects one access port.
Figure 6-2 Wireless 5.8G Band Searching Page of Client
Figure 6-3 Searching Result
25
7
Network Settings
Route mode
In route mode, DH-PFM88X with WAN port and LAN port is equivalent to a router. LAN2 port of
DH-PFM88X is equivalent to LAN port of router, whereas LAN port of POE power supplier is equivalent to WAN port of router. In route mode, connection diagram is shown as follows:
Figure 7-1 Connection Diagram of Route Mode
Figure 7-2 Route Mode
26
WAN Mode: WAN mode is to set WAN port to be static IP address and dynamic acquisition (DHCP).
When it is static IP, the user shall manually set IP and subnet mask; when it is DHCP, the equipment can acquire IP address from DHCP server automatically.
WAN IP: IP address of WAN port, which can be IP address of the same segment of network to be connected.
WAN Subnet Mask: subnet mask of WAN port, which can be IP address of the same segment of network to be connected.
Caution: IP address of WAN port cannot be the same as existing IP in the network, so as to prevent IP address conflict.
LAN IP: IP address of LAN port, to be set by the user according to needs. However, LAN IP shall not be the same as IP of other equipment in the same network, so as to prevent IP address conflict.
LAN Subnet Mask: subnet mask of LAN port, which is set by the user according to IP of LAN port.
Main DNS and Supplemental DNS: DNS server, which is set to be value of local DNS server.
Gateway: gateway address is usually set to be IP address of LAN port.
Firewall
Firewall is used to shield DH-PFM88X from some equipment, as is shown in the following figure.
There are 4 types of firewall filtering:
27
Figure 7-3 Firewall
Filter one equipment whose IP address is xxx.xxx.xxx.xxx
Firewall is enabled, IP filtering mode is set to be “Refuse”, and any one item in IP1 ～ IP10 is set to be IP that shall be filtered.
Filter one equipment
Firewall is enabled, MAC filtering mode is set to be “Refuse”, and any one item in Mac1 ～ Mac10 is set to be MAC address of the equipment to be filtered.
Except the equipment whose IP address is xxx.xxx.xxx.xxx, others are filtered.
Choose to “Accept” IP filtering. Any one item in IP1 ～ IP10 is set to be the IP that shall be accepted.
Accept only one equipment
Firewall is enabled, MAC filtering mode is set to be “Accept”, and any one item in Mac1 ～ Mac10 is set to be MAC address of the equipment to be accepted.
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Page of advanced settings:
8
Advanced Settings
Figure 8-1 Advanced Settings
Auto ACK-Timeout Adjustment: it is suggested that “Auto ACK-Timeout Adjustment” should be enabled. This option can test the distance between two devices automatically, and set parameters according to this distance, in order to optimize wireless connection quality.
Distance: if “Auto ACK-Timeout Adjustment” is enabled, this distance setting becomes invalid; the system will test device distance automatically and optimize connection quality. “Auto ACK-Timeout
Adjustment” shall be disenabled, so distance set by the user will take effect.
Aggregation: different frames are aggregated and sent out. This function enhances throughput rate and
29
it is enabled by default.
RTS Threshold: when packet length is over or equivalent to the set value, RTS/CTS mechanism will be started. To send data, the station will send a RTS to AP, and notify AP that it will send data. After receiving the request, AP notifies all other stations in its coverage through CTS, and requires them delaying sending. Meanwhile, AP notifies requesting station to send data.
Fragmentation Threshold: when packet length is over the set value, the packet will be divided into multiple data fragments, which shall be even number.
Multicast Data: if this function is enabled, DH-PFM88X allows multicast packets to pass DH-PFM88X.
Enable Autonegotiation: when enabled, according to connecting speed and duplex mode of device on the other end, LAN port automatically adjusts its speed to the highest public level, so both ends of the line own the highest speed and duplex mode. It is enabled by default, so the user doesn’t need to set.
Enable Full Duplex: it determines whether LAN port of DH-PFM88X allows the data to transmit in two directions simultaneously.
LAN Speed: LAN port of DH-PFM88X owns two speeds: 10Mbps and 100Mbps.
Signal LED Configure: LED1, LED2 and LED3 settings refer to signal strength value of the device to turn on 3 LED lights. LED3 signal strength value is the largest (LED3>LED2>LED1); default settings are
LED1:-86dB, LED2:-71dB and LED3:-56dB. LED1 turns on when signal strength is higher than LED1 and lower than LED2. LED1 and LED2 turn on when signal strength is higher than LED2 and lower than
LED3. LED1, LED2 and LED3 turn on when signal strength is higher than LED3.
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9
System Settings
System settings interface consists of configuration management, firmware configuration, device settings and account information.
Figure 9-1 System Settings
Figure 9-2 Accounts Information
Backup Configuration: click “Download” to backup present webpage configurations. Note that configuration file contents cannot be modified manually.
Upload Configuration: click “Browse” to select previously downloaded configuration file; click “Upload”.
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Device configuration will be restored to the device configuration when backup of configuration file is carried out.
Firmware Update: click “Browse” to select the version to be updated; click “Update” and the device starts to update.
Firmware Reboot: click “Reboot” and the device starts to reboot.
Restore Factory Settings: click “Reset” on the webpage. After a while, device configurations are restored to factory settings.
Device Name: the user can set the device name according to needs.
Login Timeout: when login timeout is set to a value and the webpage doesn’t respond after the time period, the system will skip to login interface.
Interface Language: the user chooses language of the webpage according to needs.
Account Information: when “Modify User Password” is enabled, the user can modify account information according to needs.
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10
Tool Application
Tool application page consists of testing tool and Telnet:
Figure 10-1 Tools ping IP: when the user sets IP address of a device in ping IP bar and clicks “Ping”, if this device is connected with DH-PFM88X, ping result will be “Alive”; otherwise, it will be “Not Alive”.
Ping Watchdog: it is used to monitor the operation of Wireless Bridge continuously. In particular, Ping tool is used when connecting remote host. Wireless Bridge is able to ping the target host for a long time.
If Wireless Bridge doesn’t receive certain defined quantity of replies, this tool will reboot Wireless Bridge.
Ping IP Address: IP address of target host.
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Ping Interval: time interval between two pings.
Ping Failure: when continuous Ping failure reaches the set value, the device will reboot WIFI.
Startup Delay: it will start to ping the target host, after Wireless Bridge system is started and delayed for the set time period.
Telnet: when Telnet is enabled, in command prompt window of Windows XP or Windows 7, Telnet xxx.xxx.xxx.xxx(DH-PFM88XIP) can be used to login DH-PFM88X. When Telnet is disenabled, it cannot be used to login the system.
Syslog: enable Syslog function, set PC IP of Syslog server and set server port to be 514. Then, relevant log information will be seen on Syslog server.
NTP Client: if DH-PFM88X can go online, NTP client function is enabled and URL of NTP server is set,
DH-PFM88X will calibrate device time according to NTP server, and display it on status display page.
SNMP Proxy: with SNMP proxy, network administrator can monitor network performance, search and solve network problems. For example, enable SNMP proxy, fill in a user name in SNMP community, such as creatcomm, fill in the mailbox such as [email protected] and write creatcomm in location information. Then, save and apply. Install mrtg on the host, and open mrtg webpage to observe traffic and other information about DH-PFM88X.
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Appendix 1 Industry Application
Appendix 1.1 Wireless Surveillance of Safe Site
System Diagram (Standard Proposal)
Appendix Figure 1-1
The recommended standard wireless surveillance proposal of construction site adopts point-to-point transmission. Receiving end adopts DH-PFM880 device, which provides necessary technical support for future expansion.
No.
2
Type
1 Wireless receiving end
Wireless client
3 Switch of machine room
(optional)
Model No.
Qty.
Description
DH-PFM88
0
DH-PFM88
1
DH-S4200-
24T
1
1
1
IP66, wide temperature: -30~70°, wireless bandwidth: 300M, coverage area: 3km, standard power supply, high-power antenna and dual feeder
Outdoor waterproof, wide temperature:
-30~70°, wireless bandwidth: 300M, coverage area: 3km, standard power supply
Gigabit management
24*10/100/1000Base-T, switch,
4*SFP
(Combo) light, natural heat dissipation without fan, dustproof design
Feature
It applies to outdoor high temperature and low temperature environment.
It applies to outdoor high temperature and low temperature environment.
It applies non-standard machine environment. to room
Appendix Table 1-1 Recommended Model Selection List of Standard Proposal
35
System Diagram (Economical Proposal)
Appendix Figure 1-2
With point-to-point transmission, receiving end adopts DH-PFM881 device.
1
2
3
No.
Type Model No.
Qua ntity
Description Feature
Wireless receiving end
Wireless client
DH-PFM881
DH-PFM881
1
1
Outdoor waterproof, wide temperature:
-30~70°, wireless bandwidth: 300M, coverage area: 3km, standard power supply
Outdoor waterproof, wide temperature:
-30~70°, wireless bandwidth: 300M, coverage area: 3km, standard power supply
It applies to outdoor high temperature and low temperature environment.
It applies to outdoor high temperature and low temperature environment.
Switch of machine room
(optional)
DH-S4200-24
T
1 Gigabit management fan, dustproof design switch,
24*10/100/1000Base-T, 4*SFP(Combo) light, natural heat dissipation without
It applies to non-standard machine room environment.
Appendix Table 1-2 Recommended Model Selection List of Economical Proposal
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System Diagram (Full Wireless Coverage Proposal)
Appendix Figure 1-3
This proposal is highly comprehensive. Generally speaking, required device quantity shall be confirmed according to actual needs.
No.
Type Model No.
Qty.
Description Feature
1
2
3
4
Wireless receiving end
Wireless client
DH-PFM880
DH-PFM881
X
X
IP66, wide temperature: -30~70°, wireless bandwidth: 300M, coverage area: 3km, standard power supply, high-power antenna and dual feeder
Outdoor waterproof, wide temperature: -30~70°, wireless bandwidth: 300M, coverage area:
3km, standard power supply
It applies to large construction site projects, to be adjusted according to actual needs.
It applies to large construction site projects, to be adjusted according
Outdoor switch
Switch of machine room
DH-S4000-7X X
DH-S4200-24
T
1
4* 10/100M,
2*1000MSFP
1*10/100/1000M, optical port, 1
Console port, support STP ring network protocol
Gigabit management switch,
24*10/100/1000Base-T,
4*SFP(Combo) light, natural heat to actual needs.
It applies to large construction site projects, to be adjusted according to actual needs.
It applies non-standard machine to room
(optional) dissipation without fan, dustproof design environment.
Appendix Table 1-3 Recommended Model Selection List of Full Wireless Coverage Proposal
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Appendix 1.2 Wireless Surveillance of Safe Town
System Diagram (Full Wireless Coverage Proposal)
Appendix Figure 1-4
Rural scene is relatively fixed, so it is easiest to design wireless proposals. The proposal for every village is almost the same: it centers on village committee, and video data is wirelessly converged and saved in NVR device in machine room. Through operator network, town and county surveillance center can carry out data debugging, backup and save crucial videos.
No.
Type
1 Wireless receiving end
2
3
Wireless client
Outdoor switch
Model No.
DH-PFM88
0
DH-PFM88
1
DH-S4000-
7X
Qty.
4
X
1
Description
IP66, wide temperature: -30~70°, wireless bandwidth: 300M, coverage area: 3km, standard power supply, high-power antenna and dual feeder
Outdoor waterproof, wide temperature: -30~70°, wireless bandwidth: 300M, coverage area:
3km, standard power supply
4* 10/100M, 1*10/100/1000M,
2*1000MSFP optical port, 1
Console port, support STP ring network protocol
Feature
Four APs combine to cover 360° for 3 km area
There are about 15 generally, to be adjusted according to actual needs.
It applies to outdoor high and low temperature environment, and converges with four
APs.
38
4 Switch of machine room
(optional)
DH-S4200-
24T
1 Gigabit management switch,
24*10/100/1000Base-T, 4*SFP
(Combo) light, natural heat dissipation without fan, dustproof design
It applies non-standard machine room.
Appendix Table 1-4 Recommended Model Selection List of Wireless Rural Surveillance to rural
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Appendix 2 Troubleshooting
1. The device fails to start normally:
(1) Network line from the device to POE module exceeds 40 meters.
(2) Network line has poor quality and materials.
(3) Crystal plug of network line isn’t connected firmly or line sequence is wrong (crystal plug shall be remade).
2. IP address is forgotten and factory settings cannot be restored.
Please manually press Reset key for 5-10 seconds. After all LED lights of the device turn on, input
IP:192.168.1.36 to log onto the device.
3. My computer cannot find wireless AP. Why?
Solution: wireless system will connect at the maximum working rate, and specific rate will depend on distance and environment. To obtain maximum possible connecting rate, the following links shall be tested:
(1) Position of wireless AP
Try to adjust the position and direction of wireless AP.
(2) Wireless channel
Use other communication channels. Interference may be obviously improved.
(3) Wireless interference
Other devices may cause interference too. Turn off other devices and check whether it is improved.
Interfering devices shall be shielded or relocated.
4. Too low signal strength is due to the following reasons:
(1) Client fails to be visible for AP, because of large obstacles.
(2) Surface plate of client doesn’t align with AP; angle of pitch of AP and client is inappropriate.
(3) Client is installed on a window, which easily leads to planar interference.
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(4) Distance between AP and client is too long.
5. Why is signal quality high while throughput capacity is low?
Analyze reasons:
(1) Too much interference or multipath interference.
(2) Ethernet port of the device breaks down.
6. Frequent packet loss. Serious packet loss occurs when many devices are installed in the same region. It will be improved if channels are changed.
Same frequency interference occurs in case that multiple DH-PFM88X devices are used in the same region, and channels of every two devices are not isolated. It is suggested that the user should isolate their frequency, and make sure that their channels don’t overlap. When channel width is 20M, frequency difference between two devices shall be over 20M.
7. Packet loss and large delay occur when the computer pings device address:
(1) APs connecting with the same POE switch shall carry out port isolation.
(2) Crystal plug of network line isn’t connected well (crystal plug shall be remade).
8. The user suffers from frequent lost connection and low speed:
(1) Too many users connect with AP.
(2) AP signal is weak.
(3) There are many serious interference signals in surrounding environment; client and AP aren’t bound.
(4) Check whether user quantity and upper network bandwidth are saturated or not.
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Appendix 3 Points for Attention
1. Horizontal Direction and Angle of Pitch of Antenna
Since base station and wireless bridge adopt directional antenna, AP antenna on the base station shall tilt down for certain angle. Meanwhile, AP shall align with client antenna.
2. Erecting Height of Antenna
Since the earth is spherical, wireless communication between two actual points places certain requirements on the distance between two points and erecting height of antenna. For details, refer to the following table.
3Km 5Km 10Km 15Km Transmission distance
5.8GHz 5m 7m
Appendix Table 3-1
11m 16m
3. Geographical Environment
The farthest communication distance is realized at sea level and clear open land; this is geographical condition used to evaluate communication distance of wireless communication equipment.
It is followed by semi-clear and semi-open environment, such as suburb countryside, hills and riverbeds.
The nearest communication distance is realized at urban buildings or mountains. In one word, closer obstacles exert greater effects on wireless communication distance; especially metal objects exert the greatest effects. Therefore, during actual construction, try to make sure that client and AP are visible to each other directly.
4. Electromagnetic Environment
DC motor, high-voltage grid, switching power supply, electric welding machine, high-frequency electronic equipment, computer and single-chip microcomputer exert effects on communication distance of wireless communication equipment to varying degrees.
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5. Climatic Condition
Communication distance is relatively far in case of dry air and relatively near in case of moist air
(especially rainy and snowy weather).
6. Transmitted Power
The larger the transmitted power is, the farther communication distance will be. During outdoor long-distance communication, output power is usually set at the maximum value.
7. Try to Avoid Same Frequency Interference and Adjacent Frequency Interference
When setting AP frequency, employ the client to search what frequencies are being used by other equipment nearby. AP frequency shall try to avoid these frequencies. To prevent adjacent frequency interference, AP frequency shall be away from those frequencies used nearby. For example, when channel width is 20M, it shall be at least 20M away from the frequency under use. Meanwhile, frequency between APs shall also be set in this way.
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Appendix 4 Test Report
Test Description
This test report mainly tests ultimate wireless transmission performance of DH-PFM88X product under the condition of no occlusion and slight occlusion, including transmission distance and wireless throughput rate with certain transmission distance.
Test (No Occlusion)
This test was carried out at East China Sea Dike in Pudong New District of Shanghai; the coastal dike has no occlusion, as shown in the map.
Appendix Figure 4-1
Actual environment and actual condition of this test is shown as follows:
1) The test was located at a coastal dike, about 5 ～ 10 meters higher than the sea in the left and
44
land in the right.
2) The whole dike was basically a straight line.
3) Test pole was about 8 meters higher than the dike. Point-to-point test was carried out between point A and point B.
Appendix Figure 4-2
Test Tool
1) Test tool: Chariot (professional network speed test software)
2) Test equipment: DH-PFM880 <->DH-PFM881; one DH-PFM880 and one DH-PFM881 were placed at both points respectively.
Test Result
1KM Test Result
Equipment (AP/STA) RSS (dBm) Throughput (Mbps)
55/56 -51/-53
Channel Bandwidth
31.2/31.1 (uplink and downlink) 5785 MHz 20MHz
55/56
55/56
-50/-49
-55/-57
37/36.8(uplink and downlink) 5500 MHz 20MHz
36.2/36(uplink and downlink) 5785 MHz 40MHz
55/56 -54/-54 40.7/42.7(uplink and downlink) 5500 MHz 40MHz
2KM Test Result
Equipment (AP/STA) RSS (dBm) Throughput (Mbps) Channel Bandwidth
45
55/56
55/56
-62/-63
-60/-60
27.1/26.4 (uplink and downlink) 5785 MHz 20MHz
32.9/33.1 (uplink and downlink) 5500 MHz 20MHz
55/56 -66/-64 31.2/31.3 (uplink and downlink) 5785 MHz 40MHz
38.7/38.3 (uplink and downlink) 5500 MHz 40MHz 55/56 -63/-64
5KM Test Result
Equipment (AP/STA) RSS (dBm) Throughput (Mbps)
55/56 -72/-73
Channel Bandwidth
17.8/18.1 (uplink and downlink) 5785 MHz 20MHz
55/56
55/56
-72/-69
-77/-77
28/28.1 (uplink and downlink) 5500 MHz 20MHz
26.2/25.9 (uplink and downlink) 5785 MHz 40MHz
55/56
55/56
-74/-74
-75/-72
34.4/34.7 (uplink and downlink) 5500 MHz 40MHz
10KM Test Result
Equipment (AP/STA) RSS (dBm) Throughput (Mbps)
55/56 -77/-79
Channel Bandwidth
11.8/11.7 (uplink and downlink) 5785 MHz 20MHz
16/15.9 (uplink and downlink) 5500 MHz 20MHz
55/56 -80/-81
55/56 -78/-74
Throughput and Distance Curve
14.8/13.6 (uplink and downlink) 5785 MHz 40MHz
19.3/21 (uplink and downlink) 5500 MHz 40MHz
73.8
62.3
66
53.5
56.1
35.9
31.9
23.5
1 2 5 10
5500MHz 5785MHz
Appendix Figure 4-3 Throughput and Distance Curve at Suburb and 20M bandwidth
46
83.4
72.2
77
62.5
68.7
51.7
40.3
28.4
1 2 5 10
5500MHz 5785MHz
Appendix Figure 4-4 Throughput and Distance Curve at Suburb and 40M bandwidth
Test (Slight Occlusion)
This test was carried out at Shenjiang Road in Pudong New District of Shanghai (as shown in the following figure). Crucial features of this test are as follows:
1) Shenjiang Road is relatively straight, but with ups and downs (including bridges etc.), so it is slightly occluded environment.
2) There are buildings, many companies and hotels at both sides of Shenjiang Road. There is WIFI signal in many buildings, so wireless environment is relatively harsh.
3) Numerous trucks and cars on Shenjiang Road exert great effects on wireless signal.
47
Appendix Figure 4-5
Test Tool
1) Test tool: Chariot (professional network speed test software)
2) Test equipment: DH-PFM880 <->DH-PFM881; one DH-PFM880 and one DH-PFM881 were placed at both points respectively.
Test Result
2KM Test Result
Equipment (AP/STA) RSS (dBm) Throughput (Mbps)
55/56 -73/-75
Channel Bandwidth
33.5/8.9(uplink and downlink) 5785 MHz 20MHz
55/56
55/56
-71/-73
-74/-73
23.6/16.4(uplink and downlink) 5500 MHz 20MHz
3.5KM Test Result
Equipment (AP/STA) RSS (dBm) Throughput (Mbps)
55/56 -77/-77
Channel Bandwidth
14.6/13.5(uplink and downlink) 5785 MHz 20MHz
17.7/19.8(uplink and downlink) 5500 MHz 20MHz
Throughput and Distance Curve
48
42.4
40
37.5
28.1
2 3.5
5500MHz 5785MHz
Appendix Figure 4-6 Throughput and Distance Curve at Downtown Area and 20M bandwidth
49
Appendix 5 Technical Specification
Type Item
Standard
Modulation
Antenna
Equivalent output power
Wirele ss techn ology
Receiving sensitivity
Optimal transmission distance
Working frequency
Wireless authentication
Wireless direction angle
DH-PFM880
IEEE802.11a/n (2T2R 300Mbps)
802.11 a/n:OFDM
External antenna: gain 16dbi
DH-PFM881
+27dBm(@MCS0,11n)
Internal antenna: gain 15dbi
＋ 23dBm(@MCS0,11n)
＋ 15dBm(@300Mbps,11n)
-74dBm @ 65Mbps, -96dBm@1Mpbs
0-3km
5745-5825 MHz (support frequency extension, extension
Horizontal 90°, angle of elevation
12°
Horizontal 40° angle of elevation 15°
11n:13.5/15/27/30/40.5/45/54/60/81/90/108/120/121.5/135/150/162/180/21
Transmission rate
Hard ware
Softw are
Working voltage
Power consumption
Interface
Indicator light
Working temperature
Storage temperature
Working humidity
Host machine dimension (mm)
Antenna dimension (mm)
Host machine weight
Antenna weight
Protection level
Way of encryption
Network mode
Working mode
Security mechanism
Network protocol
TDMA enhancement
Auto ACK timing adjustment
12~24V POE
MAX 10W
POE
MAX 8W
Wi-Fi status indicator light /LAN interface indicator light /power indicator light /signal strength indicator light
-30 ℃～ +70 ℃
-30 ～ +80 ℃
5% ～ 95%RH non-condensing
233×233×45
450×140×35
2.4Kg
1.26Kg
IP66
270×50×80
N/A
0.45Kg
N/A
N/A
WEP/WPA-PSK/WPA2/CCMP(AES)/TKIP
Route/ network bridge
AP/client /WDS AP/WDS client
IP/MAC address filtering, hide network name and so on
TCP/UDP/ARP/ICMP/DHCP/HTTP/NTP
Support (TDMA removes effects of hidden nodes and promotes one-to-many performance substantially)
Support (optimize parameters automatically during long-distance communication, and optimize performance )
Management and log NTP, SNMP, Syslog, Telnet
Webpage configuration management Support webpage configuration
Firmware update Support webpage update of firmware
Flexible configuration of bandwidth 5M/10M/20M/40MHz
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ZHEJIANG DAHUA VISION TECHNOLOGY CO.,LTD.
Address ： No.1199, Bin'an Road, Binjiang District, Hangzhou, P.R. China
Postcode: 310053
Tel: +86-571-87688883
Fax: +86-571-87688815
Email:[email protected]
Website: www.dahuasecurity.com
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