Cradlepoint A2415 Series Cellular Access Point Installation Guide

A2415 Series Cellular Access Point
Installation Guide
A2415 Series Cellular Access Point Installation Guide
Table of Contents
Product Overview ....................................................................................................................... 3
Introduction ........................................................................................................................ 3
Highlights ........................................................................................................................... 3
Appearance ........................................................................................................................ 3
Installation Preparation ............................................................................................................... 6
Support Materials ............................................................................................................... 6
Installation Tools ................................................................................................................. 7
Installation Environmental Requirements .............................................................................. 7
Lightning & Grounding Protection ........................................................................................ 7
Weatherproofing ................................................................................................................. 8
Installation .................................................................................................................................. 9
Unpacking .......................................................................................................................... 9
Installation Procedure Overview ........................................................................................... 9
Installing the GNSS Antenna ............................................................................................... 9
Install on Pole .................................................................................................................... 10
Install on Wall .................................................................................................................... 11
Connect Cable ................................................................................................................... 12
Cable Laying Requirements ....................................................................................... 12
Connecting the GNSS Antenna .................................................................................. 13
Connecting the RF Cable ........................................................................................... 13
Connecting the Optical Fiber ...................................................................................... 13
Connecting the Ethernet Cable ................................................................................... 14
Connecting the Power Connector ............................................................................... 14
Connecting the Ground Cable .................................................................................... 16
Waterproofing the Maintenance Chamber ............................................................................ 19
Powering on to Check LED Status ...................................................................................... 19
Troubleshooting ......................................................................................................................... 20
FAQ .................................................................................................................................. 20
Common Installation Errors ................................................................................................ 20
Terminology & Acronyms ............................................................................................................ 23
Regulatory Compliance .............................................................................................................. 24
FCC Compliance ............................................................................................................... 24
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A2415 Series Cellular Access Point Installation Guide
Product Overview
Introduction
The Cradlepoint A2415 is an advanced two-carrier outdoor Cellular Access Point (CAP) compliant with
3GPP LTE TDD technology. This 4x1W CAP operates in Carrier Aggregation (CA) mode or Dual Carrier
(DC) mode.
In CA mode, A2415 supports 2CC (2 component carriers) DL/UL CA. 2CC DL/UL CA doubles DL/UL
peak throughput comparing to that of a single carrier. By aggregating 2 separated spectrum resources
into a virtual contiguous spectrum resource. In DC mode, each carrier is treated as an independent cell,
supporting 128+128 users, with each cell supporting 5, 10, 15, or 20 MHz bandwidth. Using a A2415 in DC
mode simplifies and streamlines the deployment of split sectors.
Highlights
Following are some of the key A2415 highlights.
• GUI-based local and remote Web management
• Excellent Non-Line-of-Sight (NLOS) coverage
• Peak rate: Up to DL 290Mbps and UL 70Mbps with 2x20MHz bandwidth
• 2CC DL/UL CA improves the spectrum efficiency of fragmented spectrum resources.
• Suitable for private and public deployments; any IP based backhaul can be used, including public
transmission protected by Internet Protocol Security (IPsec)
• 128 RRC connected users per carrier, 128+128 in DC mode; upgradeable to higher capacity in future
releases
• Supports 4-port antenna or 2 antennas with 2 ports
• Integrated small cell form factor for quick and easy installation
• Supports Transparent Bridge Mode
• Supports Citizens Broadband Radio Service (CBRS) with proxy/direct Spectrum Access System (SAS)
• Supports Multi Operator Radio Access Network (MORAN)
• Support Inter Cell Interference Coordination (ICIC) with static
• Plug-and-play with Self-Organizing Network (SON) capabilities
• Inter operation with all standard LTE Evolved Packet Core network (EPC)
• Supports TR-069 network management interface
• Lower power consumption, which reduces OPEX, can be powered easily by Baicells compact outdoor
smart UPS
Appearance
The A2415 CAP appearance is shown below.
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A2415 Series Cellular Access Point Installation Guide
The A2415 ports and LEDsare shown below.
The A2415 ports are described below.
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A2415 Series Cellular Access Point Installation Guide
Port Name
Description
DC48V
Power interface: -40VDC ~ -57 VDC, nominal -48VDC
OPT
Optical interface (SFP), connect to external transmission network, used for
data backhaul.
ETH
RJ-45 interface (GE), used for debug or data backhaul.
GPS
External GPS antenna, N-female connector.
ANT0
External antenna 0, N-female connector.
ANT1
External antenna 1, N-female connector.
ANT2
External antenna 2, N-female connector.
ANT3
External antenna 3, N-female connector.
A2415 LED Indicators:
LED
Color
PWR
Green
Status
Steady On
Description
Power On
OFF
No Power Supply
CELL 2 inactivated
CELL2
Green
Fast flash: 0.125s on,0.125s off
Slow flash: 1s on,1s off
CELL 2 activated
CELL1
Green
Fast flash: 0.125s on,0.125s off
CELL 1 inactivated
Slow flash: 1s on,1s off
CELL 1 activated
ALM
Red
Steady On
Hardware alarm, e.g., VSWR alarm
OFF
No alarm
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A2415 Series Cellular Access Point Installation Guide
Installation Preparation
Support Materials
In addition to industry standard tools, you will need the materials described in Table 2‑1 during the
installation. When selecting an RF antenna, be sure to match the frequency range of the antenna with
the CAP.
Table 2‑1 Support Materials
Item
Figure
Description
AC cord
The diameter of power cable must be AWG13 (2.5mm²) or
greater (such as AWG12) with three cores.
DC cord
It is suggested that AWG13 is used if the DC cord is less
than 10 meters and AWG12 is used if the DC cord is
between 30 meters to 60 meters and the adaptor output
is 500 watts. The cord is two cores cable, the diameter of
the cable is 9±1mm.
RF antenna
cable
50 ohm feeder, 1/2 jumper
Optical fiber
Optical fiber (armor)
It is suggested that the diameter of the cable is 7±1mm.
Ethernet
cable
Outdoor CAT6, shorter than 100 meters (~109 yards)
RF antenna
Omni or directional dual polarized antenna
Ground
cable
If the length of lead is more than 10 meters,
It is suggested that the diameter of the cable is 7±1mm.
10mm² diameter grounding cable should be used. If the
length of lead is less than 10 meters, 10mm² diameter
grounding cable should be used.
Pole
￠ 100mm≥pole≥￠ 40mm hot-galvanized steel pipe
Channel steel and equal angle steel installation are also
supported. The width of the channel steel is 50mm to
100mm; the length of side of the angle steel is 63mm to
80mm.
Distribution
box
AC Air switch, socket, power grounding point, broadband
access is all in the distribution box, which must be
waterproofed.
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A2415 Series Cellular Access Point Installation Guide
Installation Tools
The following tools are needed during the installation.
Level bar
Marker pen
Knife
Pliers
Adjustable wrench
Power drill and drill
bits
Hammer
Phillips screwdriver
Cable crimping tool
Tape measure
Allen wrench (5 mm)
Screwdriver (T7)
Ladder
Compass
Fixed pulley
Multimeter
Installation Environmental Requirements
In addition to network planning, when determining where to place the CAP you need to consider
factors such as climate, hydrology, geology, the possibility of earthquakes, reliable electric power, and
transportation access. Avoid locating the CAP in areas where there may be extreme temperatures,
harmful gases, unstable voltages, volatile vibrations, loud noises, flames, explosives, or electromagnetic
interference (e.g., large radar stations, transformer substations). Avoid areas prone to impounded water,
soaking, leakage, or condensation.
Table 2‑2 provides typical environmental specifications for this CAP.
Table 2‑2 Environmental Requirements
Item
Range
Typical value
Temperature
-40°C to 55°C
25°C
Relative humidity
0% to 100%
5% to 95%
42V to 58V
48V
(no condensation)
Safety voltage
Lightning & Grounding Protection
You must protect the CAP, antennas and GPS against lightning. Following are guidelines concerning
grounding.
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A2415 Series Cellular Access Point Installation Guide
• The yellow-green ground wire must be at least 10mm2 in diameter.
• Always place the grounding as near as possible to the equipment.
• Connect to a reliable outdoor grounding point (earth) using one ground screw.
• The connection of the grounding points and ground bar need to be tight and reliable. Rustproofing the
terminals, e.g., with anti-oxidant coating or grease, is required.
Weatherproofing
To protect the connection points from weather and climate, clean each connection point before installing
cold shrink tubes, per the following.
1.
Insert the cable into the cold shrink tube.
2.
Tighten the connector.
3.
Push the cold shrink tube to the top joint, and pull out the strip.
4.
Ensure the cold shrink tube is tightly fitted with the connection.
Weatherproofing
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A2415 Series Cellular Access Point Installation Guide
Installation
Unpacking
Before opening the box, make sure the package is in good condition, undamaged and not wet. During the
unpacking, avoid potential damaging impacts from hits or excessive force.
Once unpacked, check whether the quantity is consistent with the packing list.
Installation Procedure Overview
The A2415 CAP installation process is generally as follows:
Installing the GNSS Antenna
Read the following GNSS/GPS antenna installation requirements before installing it on the CAP.
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A2415 Series Cellular Access Point Installation Guide
• No major blocking from buildings in the vicinity. Keep the rooftop buildings a distance away from the
GPS. Make sure the space atop within 90 degrees (at least 45 degrees) is not blocked by any buildings.
• Avoid installing the GNSS in the vicinity of any other transmitting and receiving devices. Avoid
interference from other transmitting antennas to the GNSS antennas.
• The GNSS antenna should be installed within 45 degrees to the lightning rod.
• When two or more GNSS antennas are installed, it is recommended to keep the spacing of more than 2
meters and install multiple GNSS antennas in different locations to prevent simultaneous interference.
• Do not install the GNSS antenna near other transmitting and receiving equipment. Do not install it under
the microwave antenna or high voltage cable. Avoid the direction of radiation from other transmitting
antennas to the GNSS antenna.
• GNSS antenna feeders cannot be grounded together with ground conductors of interfering equipment
such as air conditioners, motors, and pump motors, etc. to prevent external interference from being
introduced into the antenna system.
The GNSS antenna system is assembled before packing. The only installation step is to affix the GPS
mounting bracket on the CAP with the M4*14 screws.
NOTE: Included GPS antenna may vary from the one shown, while the installation steps are the same.
Install on Pole
The CAP mounting bracket is assembled in manufacturing before packing. The only action required by the
installer is to fix the assembly on the pole.
Check to ensure the diameter of the pole is in the range of 1.6 inches to 2.8 inches (40mm to 70 mm). The
position of the gNB on the pole should be at least 47 inches (120 cm) in height.
Follow the steps below to install the CAP on a pole.
1.
Unscrew the 4 screws of the assembled bracket. Slide the two omega clamps to the left, and then turn
them up or down.
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A2415 Series Cellular Access Point Installation Guide
2.
Attach the bracket to the pole, considering the height requirements described above. Fit the threaded
rod of the bracket to the pole, and then turn the 2 clamps to the proper position. Fasten with the 4
screws.
3.
Align the pin on the CAP bracket to the pin holes on the pole bracket, lower the pin into the pin holes
vertically until the hook on the CAP gets stuck firmly with the slot on the pole bracket.
4.
Tighten the screw on the top of the bracket using a Phillips screwdriver to complete the installation.
5.
Proceed to “3.6 Connect Cable”.
Install on Wall
Ensure that the wall can bear at least 4 times the weight of the CAP. Follow the steps below to install the
A2415 CAP on the wall.
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A2415 Series Cellular Access Point Installation Guide
1.
Take apart the assembled installation bracket kit to get the installation bracket.
2.
Hold the installation bracket against the wall, with the arrow pointing up. Mark the drilling locations
using a pencil or marker.
3.
Drill two .4in/10mm diameter by 2.8in/70mm deep holes in the wall at the marked locations.
4.
Insert M8 * 80 expansion screws and fasten.
5.
Check the up/down direction of the installation bracket, and then fix it to the wall with M8 * 80
expansion screws.
6.
Refer to pole installation steps, fix the CAP on the wall bracket.
Connect Cable
Cable Laying Requirements
General requirements:
• Bending radius of feeder cable: 7/8” > 250mm, 4/5” > 380mm.
• Bending radius of jumper cable: 1/4” > 35mm, 1/2” (super soft) > 50mm, 1/2” (ordinary) > 127mm.
• Bending radius of power cable and grounding cable: > tripled of the diameter of the cable.
• The minimum bend radius of the optical fiber is the 20 times the diameter of the optical fiber.
• Bind the cables according the type of the cable, intertwining and crossing are forbidden.
• An identification label should be attached after the cable is laid.
Optical fiber laying requirements:
• Avoid circling and twisting during the laying.
• Avoid binding on a turn.
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A2415 Series Cellular Access Point Installation Guide
• Avoid pulling and weighing down the optical fiber.
• The redundant optical fiber must enwind the dedicated device.
Grounding laying requirements:
• The grounding cable must connect to the grounding point.
• The grounding cable must be separate with the signal cables, of enough distance to avoid signal
interference.
Connecting the GNSS Antenna
1.
Insert the GNSS jumper into a cold shrink tube.
2.
Connect one end of the GNSS jumper to the GNSS antenna.
3.
Push the cold shrink tube to the top joint, and pull out the strip.
4.
Take another cold shrink tube, and the GPS jumper through it.
5.
Connect the other end of the GNSS jumper to GPS interface on the CAP, which also needs
weatherproof protection.
The top of the GNSS antenna should avoid the frontal position of the directional antenna as far as possible.
In the case of obstruction, it is recommended to pull away and install the GNSS antenna, that is, the GNSS
antenna be installed in an open and lightning protected position.
Connecting the RF Cable
CAUTION
It is strictly prohibited to activate the cell and transmit RF if the antenna feed system is
not connected properly. The wireless signal transmission power of the outdoor CAPs is
powerful, and if the CAP transmits without the antenna feed system it can cause injury to
installation personnel and damage the RF power amplifier devices.
1.
Open the dust caps of the ANT0, ANT1, ANT2, and ANT3 interfaces.
2.
Insert RF cables into cold shrink tubes.
3.
Connect RF cables to the ANT0, ANT1, ANT2, and ANT3 interfaces on the CAP, and tighten them with
wrench to 12-15 in-lbs or 1.4-1.7 NM torque.
4.
Push the cold shrink tube to the top joint and pull out the strip.
5.
Pass the free end of the cable through a second cold shrink tube.
6.
Connect the other end of the RF cables to the external antenna.
7.
Push the cold shrink tube to the antenna connector, and pull out the strip.
Connecting the Optical Fiber
1.
Unscrew the 3 screws on the cover of the CAP’s wiring cavity using M4 cross screwdriver. Open the
wiring cavity.
2.
Connect the optical fiber to OPT interface in the wiring cavity.
3.
Lay the optical fiber along the wire groove, and stretch out the wiring cavity from OPT hole.
Coil up the leftover fiber neatly to avoid damaging the cable as installation proceeds.
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A2415 Series Cellular Access Point Installation Guide
Connecting the Ethernet Cable
1.
Connect the Ethernet cable to ETH interface in the wiring cavity.
2.
Lay the Ethernet cable along the wire groove, and straighten out the cable from the wiring cavity and
ETH port.
Connecting the Power Connector
Since the length of cable needed for power varies from site to site, the two ends of the power adapter are
bare terminal ends. You will need to make the power cable according to the actual measurements of the
installation site, and assemble the power plug and power terminal on the two ends of the power adapter, as
shown.
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A2415 Series Cellular Access Point Installation Guide
• AC power
• It is recommended to install an air switch in the distribution box for lightning protection and leakage
protection, or a socket or plug with a fuse.
• The power cord needs to be protected by a soft casing or wiring tube.
• The distribution box should be grounding and have leakage protection.
Strip .47in/12mm insulating layer with a wire stripper, reserved conductor is used for connection. The
power cord length should be kept below 330 ft/100m.
NOTE
If the adapter connects to a surge arrester, it must be grounded.
• DC power
• If the outlet is indoors, place the power adapter indoors.
• If the outlet is outdoors, place the power adapter in a waterproof box.
The AC power cord length from the adaptor should be kept below 98.4 ft/30m.
The connection steps for the power cable are as follows.
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A2415 Series Cellular Access Point Installation Guide
1.
Assemble the power plug.
The power plug should be self-prepared according to local standards by the customer.
The power plug will be installed on the end of the input direction. Refer to the labels on the power plug
for connecting the live wire, neutral wire, and ground wire to the corresponding terminals separately,
and tighten the screws.
2.
Assemble the power terminal.
The power terminal will be installed on the end of the output direction. Refer to the image to see the
live wire and neutral wire connections.
3.
Connect the power cable to the PWR interface in the wiring cavity.
4.
The power cable lays along the lint slot, from the wiring cavity and the PWR hole.
5.
The input of the power adapter connects to the outlet.
6.
After the cable connection is complete in the wiring cavity, tighten the screws on the cover to close the
wiring cavity using M4 phillips screwdriver.
Connecting the Ground Cable
Pole Grounding
The purpose of the pole grounding is to protect the equipment in the station from the damage of lightning
overvoltage as far as possible. However, the interfaces between the CAP and the outside world mainly
include power system, grounding system, antenna feeder and lightning receiving device, and signal
line. Therefore, the damage caused by lightning mainly comes from the voltage difference between the
equipment in the CAP and one or more of the four interfaces.
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A2415 Series Cellular Access Point Installation Guide
Pole Grounding Requirements
1.
The installation position of the grounding bar shall meet the design requirements. The holding pole and
tower body must be connected to the lightning protection network or grounded with a separate lead.
2.
The diameter of the grounding wire meets the design requirements. The copper nose must be used for
grounding, and the grounding resistance is required to be less than 10 ohms. If the resistance of the
public network communication equipment placed in other systems is less than 10 ohms, the grounding
network of the system should be overlapped.
3.
The grounding wire must be the whole wire material. When laying, it should be bound separately with
other cables. All grounding wires should be fixed with wire code or binding tape with a fixed spacing of
0.3m. The appearance should be straight and beautiful.
4.
The copper bar must be used for the grounding bar, and the specification of the grounding bar shall
meet the design requirements. If there are no specific requirements in the design, 300 × 40 × 4mm and
fixed with expansion bolts.
5.
The grounding wire must be made of the whole cable material, the intermediate joint is strictly
prohibited, and the excess length should be cut. The skin shall be complete, and the insulation
resistance of the core wire to the ground (or metal isolation layer) shall meet the technical
requirements of the cable.
6.
The grounding wire shall be connected to the integrated grounding bar of the building. If it is impossible
to connect to the integrated grounding bar of the building, the appropriate grounding point can be
selected according to the integrated grounding situation of the indoor building. The selection of
grounding point must be higher than the grounding grid, and the feeder grounding shall be towards
the downward direction of the feeder, never upward.
7.
The grounding electrode of the self-built grounding grid for the outdoor antenna of the tunnel must
meet the design requirements. The buried depth of the grounding electrode and the welding quality
of the flat iron meet the specification requirements. In principle, the buried depth of the grounding
electrode shall not be less than 0.7m. The non-self-built grounding network shall be connected to the
grounding network of the owner.
8.
The CAP grounding, power adapter grounding, distribution box grounding and feeder grounding must
be connected to the grounding bar independently, and the grounding bar must have a path from the
lead to the earth.
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A2415 Series Cellular Access Point Installation Guide
CAP Grounding
Prepare the grounding cable according to the actual measurements and requirements of the specific
installation site. The CAP has two grounding screws located on the bottom of the unit. Follow the steps
below the figure to connect the ground cable.
1.
Unscrew one grounding screw, connect one end of the ground cable to the grounding screw, and
fasten it again.
2.
Once the CAP is installed at the outdoor location, the other end of the ground cable needs to connect
to a good grounding point.
GPS Antenna Grounding
If the length of GPS antenna is more than 5 meters, it is recommended to extend the installation distance.
It is suggested to carry out lightning protection of GPS antenna, add lightning protector, and connect the
lightning protector to the grounding bar.
Power Adapter Grounding
The adapter ground terminal is connected to the ground bar conforming to the local standard through the
ground wire, as shown.
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A2415 Series Cellular Access Point Installation Guide
Waterproofing the Maintenance Chamber
When all the installation has been completed, close the maintenance chamber and waterproof the
connections at the same time.
1.
Clamp the power cord to the wire position and seal the wire diameter 9 ± 1mm.
2.
Put the pigtail / network cable on the wire, and seal the wire diameter 7 ± 1mm.
Powering on to Check LED Status
Power on the CAP, and wait a few minutes while the CAP boots up. Verify that the LED indicators light up
as expected.
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A2415 Series Cellular Access Point Installation Guide
Troubleshooting
FAQ
1.
2.
After the device is connected with the power line, the PWR of the device will not be displayed when it is
powered on.
a.
Maybe the power line is not connected well, and the contact is poor.
b.
There is no power in the circuit.
c.
Reverse connection of DC wire.
d.
The adapter does not work.
e.
Poor contact of equipment power interface.
How do you connect the antenna feeder?
a.
3.
4.
5.
ANT0 is the main channel and ANT1 is the secondary channel.
Why is the GNSS out of sync?
a.
The antenna is not installed in an open place.
b.
The antenna is blocked, which affects the search.
c.
There are strong interference sources around the installation location, such as large transformer
station and high-power motor fan.
d.
Installed under the front cover of wireless antenna, strong signal interference and so on.
e.
GPS satellite search is slow and takes a long time. The number of satellites and signal strength
can be observed in the maintenance page.
What is the best practice for roof pole installation?
a.
Not near the edge.
b.
The position of non-bearing beam cannot be selected.
c.
Do not choose the side close to the barrier, you need to choose the most open position.
Why is the coverage of CAP signal not ideal after installation and powering up?
a.
Check if the power is full in the base station configuration.
b.
Check whether the equipment has standing wave alarm. If there is any alarm, please handle it in
time.
c.
Check whether the RF frequency band of the equipment is consistent with that of the antenna.
d.
Check whether the dip angle planning of the base station is reasonable.
e.
Whether there is blocking in antenna coverage direct vision.
Common Installation Errors
Avoid these common installation errors:
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A2415 Series Cellular Access Point Installation Guide
GPS antenna blocked
Disordered wiring
The holding pole lightning rod is not led to the
ground bar
The GPS antenna is mounted on the front of
the RF antenna
No lightning rod installed
Disordered wiring of distribution box
Power line and signal cable are crossed
Multiple grounding wires connected to a single
point
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A2415 Series Cellular Access Point Installation Guide
The RF feed system does not connect, the cell
is activated and RF transmits signal
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A2415 Series Cellular Access Point Installation Guide
Terminology & Acronyms
Acronym
ANR
Full Name
Automatic Neighbor Relations
ARQ
Automatic Repeat Request
CA
Carrier Aggregation
CC
Component Carriers
CSFB
Circuit Switched Fallback
DC
Dual Carrier
EPC
Evolved Packet Core network
GPS
Global Positioning System
HARQ
Hybrid Automatic Repeat Request
IPsec
Internet Protocol Security
MIMO
Multi Input Multi Output
MME
Mobility Management Entity
MOCN
Multi-Operator Core Network
NLOS
Non-Line-of-Sight
OPEX
Operating Expense
PAP
Password Authentication Protocol
PCI
Physical Cell Identifier
PLMN
Public Land Mobile Network
QAM
Quadrature Amplitude Modulation
QCI
QoS Class Identifiers
QoS
Quality of Service
QPSK
Quadrature Phase Shift Keying
RSRP
Reference Signal Receiving Power
SSH
Secure Shell
SON
Self-Organized Network
TAC
Tracking Area Code
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A2415 Series Cellular Access Point Installation Guide
Regulatory Compliance
FCC Compliance
For Cradlepoint A2415, Model S1A415A, FCC ID: UXX-S1A415A
This device complies with part 15 of the FCC Rules. Operation is subject to the 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.
Any Changes or modifications not expressly approved by the party responsible for compliance could void
the user's authority to operate the equipment.
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.
Warning:
This equipment complies with FCC radiation exposure limits set forth for an uncontrolled environment. This
equipment should be installed and operated with minimum distance 70cm between the radiator & your
body.
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