Westell CSIDSP95255U7C Users Manual
CSI-DSP95-252-L7, CSI-DSP95-252-U7C,
CSI-DSP95I-252-L7, CSI-DSP95I-252-U7C,
CSI-DSP95-255-L7, CSI-DSP95-255-U7C,
CSI-DSP95I-255-L7, and CSI-DSP95I-255-U7C,
-2-
Table of Contents
Product Registration Information ................................................................................................................... 4
Document Purpose / Intended Users.............................................................................................................. 4
Application ........................................................................................................................................................ 4
Radio and Television Interference .................................................................................................................. 4
Safety Guidelines ............................................................................................................................................. 4
Important Safety Information .......................................................................................................................... 5
Terms used in this manual .............................................................................................................................. 5
Product Introduction ........................................................................................................................................ 5
Band Plan and Filter Naming Convention ...................................................................................................... 6
LTE Filter File Naming Convention ................................................................................................................. 6
Functional Overview ........................................................................................................................................ 7
LED Indicator .................................................................................................................................................... 7
Local Communication Interface Ports ............................................................................................................ 8
EIA232 Pin Specifi cations................................................................................................................................ 8
USB Interface .................................................................................................................................................... 8
Ethernet ............................................................................................................................................................. 8
Monitoring & Alarms ........................................................................................................................................ 9
System Set-Up Considerations ....................................................................................................................... 9
Selection of external attenuators to be used in line with the Antenna Port(s) ........................................... 9
1:1 Port Confi guration ..................................................................................................................................... 9
Donor Port ....................................................................................................................................................... 10
Server Port ...................................................................................................................................................... 10
Attenuator Selection Guidelines ................................................................................................................... 10
Mounting the Digital Repeater ........................................................................................................................11
Wall Mounting .................................................................................................................................................11
19” Relay Rack Mounting ..............................................................................................................................11
19” Four Post Rack Mounting .......................................................................................................................11
Important Installation Notes .......................................................................................................................... 12
Installation Tips .............................................................................................................................................. 12
Donor Antenna ................................................................................................................................................ 12
Indoor Antennas ............................................................................................................................................. 12
Optional Accessories ..................................................................................................................................... 12
Circuit Operational Description .................................................................................................................... 13
Functional Block Diagram ............................................................................................................................. 13
Mechanical Specifi cations ............................................................................................................................. 14
Environmental Requirements........................................................................................................................ 14
AC Power Specifi cations ............................................................................................................................... 14
Operating Power Parameters ........................................................................................................................ 15
Mechanical Drawing ....................................................................................................................................... 16
System Status ................................................................................................................................................. 17
Web based GUI Session ................................................................................................................................ 17
Local Network ................................................................................................................................................. 18
RF Confi guration ............................................................................................................................................ 19
Program a Filter .............................................................................................................................................. 19
Remote Network ............................................................................................................................................. 20
SNMP Confi guration ....................................................................................................................................... 20
System Health ................................................................................................................................................. 21
Install & Upload .............................................................................................................................................. 21
Reboot ............................................................................................................................................................. 22
E-mail Confi guration ...................................................................................................................................... 22
Alarm Confi guration ....................................................................................................................................... 22
Log Confi guration .......................................................................................................................................... 22
Change Password .......................................................................................................................................... 23
Text Menu Interface (Local Access) .............................................................................................................. 23
Terminal Emulation Program ......................................................................................................................... 24
Terminal Emulation Set-up ............................................................................................................................ 25
TMI Login ......................................................................................................................................................... 26
Telnet Session (Remote Access) .................................................................................................................. 28
Telnet Session Login ...................................................................................................................................... 29
Modem Interface (Remote Access with login) ............................................................................................. 30
Additional Tips ................................................................................................................................................ 31
Suggested spectrum analyzer setting .......................................................................................................... 33
RF Notes .......................................................................................................................................................... 33
Industry Certifi cations/Registration Numbers: ............................................................................................ 34
Index ................................................................................................................................................................ 35
-3-
-4-
Product Registration Information
DISCLAIMER: All information and statements contained herein are accurate to the best of the
knowledge of Cellular Specialties, Inc. (CSI), but Cellular Specialties makes no warranty with respect
thereto, including without limitation any results that may be obtained from the products described
herein or the infringement by such products of any proprietary rights of any persons. Use or application of such information or statements is at the users sole risk, without any liability on the part
of Cellular Specialties, Inc. Nothing herein shall be construed as licence or recommendation for
use, which infringes upon any proprietary rights of any person. Product material and specifi cations
are subject to change without notice. Cellular Specialties’ standard terms of sale and the specifi c
terms of any particular sale apply.
The general safety information in this guideline applies to both operating and service personnel.
Specifi c warnings and cautions will be found in other parts of this manual where they apply, but
may not appear in this summary. Failure to comply with these precautions or specifi c warnings
elsewhere in the manual violates safety standards of design, manufacture, and intended use of
equipment. Cellular Specialties, Inc. assumes no liability for the customer’s failure to comply with
these requirements:
Grounding
This Digital Repeater system is designed to operate from 100-240 VAC and should always
be operated with the ground wire properly connected. Do not remove or otherwise alter the
grounding lug on the power cord.
Explosive Atmospheres
To avoid explosion or fi re, do not operate this product in the presence of fl ammable
gases or fumes.
Lightning Danger
Do not install or make adjustments to this unit during an electrical storm. Use of a suitable
lightning arrester, such as CSI’s model number CSI-CAP, is very strongly recommended.
No User Serviceable Parts Inside
HAZARDOUS VOLTAGES ARE PRESENT WHEN THE COVER IS REMOVED. Opening the
chassis will void your warranty. If you suspect a malfunction with this product, call your dealer or
the Cellular Specialties Support Line at: (603) 626-6677, Toll Free (USA) 1-877-844-4274.
Safety Guidelines
This guide should be applied whenever a need exists to add Digital Repeater capability to an
existing system or when this capability is being included with a new installation.
Application
Document Purpose / Intended Users
The purpose of this document is to provide a step-by-step procedure to help the experienced
technician/engineer install and commission an in-building wireless enhancement repeater system
using CSI’s Digital Repeater. Following the procedures outlined will minimize risks associated with
modifying a live system and prevent service interruptions. This document assumes the technician/
engineer understands the basic principles and functionality involved with Repeater and in-building
systems. It is geared to the practical concerns of the installer.
The serial number may be found on the label on the bottom panel near the power
connectors. Note this number below. Retain this manual, along with proof of purchase, to serve as a permanent record of your purchase.
MODEL NUMBER SERIAL NUMBER PURCHASE DATE
POINT OF SALE COMPANY
Radio and Television Interference
NOTE: This equipment has been tested and found to comply with the limits for a Class A
digital device, pursuant to Part 15 of the FCC rules. These limits are designed to provide
reasonable protection against harmful interference when the equipment is operated in a
commercial environment. This equipment generates, uses and can radiate radio frequency
energy and, if not installed and used in accordance with the instruction manual, may cause
harmful interference to radio communications. Operation of this equipment in a residential
area is likely to cause harmful interference in which case the user will be required to correct
the interference at his own expense. In order to maintain compliance with FCC regulations
shielded cables must be used with this equipment. Operation with non-approved equipment or unshieled cabled is likely to result in interference to radio & television reception.
Changes and Modifi cations not expressly approved by Cellular Specialties can void your
authority to operate this equipment under Federal Communications Commissions rules.
-5-
AGC= Automatic Gain Control ERP= Effective Radiated Power
APC= Automatic Power Control FPGA= Field Programmable Gate Array
AUI= Attachment Unit Interface LED= Light Emitting Diode
CPU= Central Processing Unit OIP3= Third-Order Intercept Point
CSI= Cellular Specialties, Inc. RF= Radio Frequency
DAS= Distributed Antenna System SBC= Single board Computer
DHCP= Dynamic Host Confi guration SNMP= Simple Network Management Protocol
Protocol TMI= Text Menu Interface
DSP= Digital Signal Processing USB = Universal Serial Bus
EEPROM= Electrically Erasable UHCI = Universal Host Controller Interface
Programmable read only Memory
Antennas used for the purpose of radiating signals indoors are limited to a maximum gain of 3 dBi. The outdoor antenna used
for the purpose of communicating to the wireless infrastructure is limited to 14dBi gain, or any combination of gain and loss that
equates to 14dB at input. Each antenna must be positioned to observe minimum separation requirements from all users and
bystanders. The following guidelines should be used when considering separation distances.
INDOOR antennas must be placed such that, under normal conditions, personnel cannot come within 122 cm (~4.0 ft.)
from any inside antenna. Adhering to this minimum separation will ensure that the employee or bystander cannot exceed RF
exposures beyond the maximum permissible limit as defi ned by section 1.1310 i.e. limits for General Population/Uncontrolled
Exposure.
OUTDOOR antenna must be positioned such that, under normal conditions, personnel cannot approach closer than 183 cm.
(~6 ft.). A directional antenna having a maximum gain of 14 dBi is used, precautions should be taken to prevent personnel from
routinely passing through the main radiation beam at a distance closer than specifi ed.
Product Introduction
Terms used in this manual
Important Safety Information
Cellular Specialties, Inc. (CSI) developed the DSP85-252, DSP85-255, DSP85I-252 and DSP85I-255 digital repeaters for use
within enclosed structures where suffi cient signal from local cell sites to operate cell phones is unavailable. Adequate signal
must be available outside the structure as a prerequisite to achieving in-building coverage. The Digital Repeater is connected to
an external antenna, usually on the roof, and to one or more internal antennas placed strategically throughout the area where
wireless service is desired.
The external antenna typically is directional, such as a “yagi”. Internal antennas are typically omnidirectional, although various
other types may be used depending on the coverage application. The CSI DSP Repeater amplifi es both the “uplink” (phone to
tower) & “downlink” (tower to phone) signals thus facilitating communications to and from the intended wireless infrastructure.
With a maximum total of +85dB nominal gain on both the up and down links, gain can be adjusted over a range from +53.5dB to
+85dB in 0.5dB steps. Control of the repeater is achieved utilizing a computer connected to com port 1 or 2 or via a Crossover
Ethernet cable connected to the Ethernet port.
A specifi c fi ltering process modifi es each amplifi cation chain. This process digitally converts the assigned spectrum and then applies digital signal processing (DSP) techniques. DSP is used to create passbands that selects the RF energy passing through
either the uplink or downlink paths. After the digital processing is complete, the information is converted back to an analog signal
that is applied to the remaining stages of amplifi cation. The resulting signals emitted by the repeater are specifi c to the network
service providers’ requirements. If these requirements change, only the DSP confi guration parameters need change in order to
adapt. Confi guration parameters are created at the factory and supplied as fi les that may be downloaded to the repeater. The
fi lter set confi gurations stored in memory determine the unit’s adaptability to various fi eld applications. The following pages describe the Cellular and PCS band plans as well as the convention CSI uses to identify and store the fi les that make up the fi lter
set. All CSI repeaters are shipped with an active fi lter set that is programmed according to the ordering parties’ specifi cations. In
most cases, the installer will not be required to program a fi lter.
LTE Filter File Naming Convention
-6-
LTE Lower A, B & C Band Plan
Up Link
(MHz
)
Down Link
(MHz)
728
698
A0
UL698-704
DL
728-734
B0
UL704-710
DL734-740
A1
UL698.5-703.5
DL728.5-733
.5
B1
UL704.5-709.5
DL
734.5-739.5
A
B
704
710
734
740
Up Link
(MHz)
Down Link
(MHz)
A2
A3
A4 A
5 A6
A7
UL698-699
DL728-729
UL699
-700
DL729-730
UL700-701
DL730-731
UL701-702
DL731-732
UL702-703
DL732
-733
UL703-704
DL733-734
B2
B3
B4 B5 B6
B7
UL704-705
DL734
-735
UL705-706
DL735-736
UL706-707
DL736-737
UL707-708
DL737-738
UL708
-709
DL738-739
UL709-710
DL739-740
746
716
C
C0
UL710-716
DL740-746
C1
UL710.5-715.5
DL740.5-
745.5
C7
C6
C5C4C3
C2
UL715-716
DL744-745
UL714-715
DL
744-745
UL713-714
DL743-744
UL712-713
DL742-743
UL711-712
DL741-742
UL710
-711
DL740-741
LTE Upper C Band Plan
Up Link
(MHz)
Down Link
(MHz)
746
776
C0
UL776-787
DL746-757
C1
UL776.5-786.5
DL746.5-
756.5
C
787
757
Up Link
(MHz)
Down Link
(MHz)
781.5
751.5
Note: All Variant/Guard Band designators other than 0 are user defi ned
custom fi lters.
Band Plan and Filter Naming Convention
-7-
The CSI-repeater incorporates the following features for convenient operation, access, protection, and control.
• Network Confi guration and Control using either a webpage style GUI through
any standard browser or a menu driven user interface using the serial port.
(Note: GUI does not require Internet access.)
• User Gain Control (affects all passbands)
• Automatic Gain Control
• Automatic Power Control
• Oscillation Protection
• Over Drive Protection (P.A. limiting)
• Under/Over Voltage Protection
• Fault Protection
• Alarm Notifi cation - Local/Remote
• Upgrade Support - Local/Remote
• External Interfaces - USB/Ethernet/Serial
• Re-loadable fi lters - Local/Remote
• Web-based monitoring and control - Local/Remote
• Persistent Status and Error information
Automatic safety precautions are built into the amplifi er system. In the case of a catastrophic system event, a shutdown circuit is incorporated that will disable all emissions should the uplink input or downlink input be overdriven or should an oscillation or output overpower
event occur. The amplifi er will periodically attempt to recover from the detected condition automatically. Warning light indicators are as
follows:
When a boot up is complete and no alarm conditions exist, the LED indicator will be illuminated green.
Should a fault condition develop the LED will illuminate red and the user may check the status page
of the GUI for the nature of the fault.
*
Functional Overview
LED Indicator
*Note: During Power up, the repeater will require a approximately three minutes for
the internal computer to boot up. During this time the LED on the front panel may light
and go out several times.
Do not unplug the unit while it is in the boot up process!
-8-
EIA232 Pin Specifi cations
The diagram above is for reference only, it’s intended to provide a quick source for pinout information in the event it should be necessary to adapt your serial cable because of an unusual connector
confi guration. In the vast majority of cases this information will not be needed.
To allow monitoring and control, the repeater is equipped with four ports that provide external communication access (1 Ethernet CAT5, 2 DB-9 serial, and 1 USB). The Ethernet, CAT-5 port is provided as a primary communications port to the PC. One serial interface
provides communications to local PC and the second to an external modem when provided. The USB interface provides a means to
download fi les from a memory device and may also be used by an external modem. The DB-9 pin assignments conform to the standard
Electronic Industries Association (EIA232) specifi cation. A diagram of the pin descriptions is provided on this page for reference.
Connecting a null modem cable to one of the COM ports and using a terminal emulation program with a PC will allow communication to
the control processor’s Text Menu Interface (TMI). See command line interface section for further detail.
The Universal Serial Bus (USB) interface conforms to Intel’s Universal Host Controller Interface (UHCI)
version 1.1 dated March 21, 1996. This interface will support data transfer rates up to 12 Mbps and can
be used for software updates and fi lter fi le uploads.
Local Communication Interface Ports
USB Interface
The Ethernet AUI conforms to IEEE 802.3 and is capable of supporting 10/100 Mbps communications
speeds. This port is used to provide access to the GUI.
Ethernet
-9-
All cables should be checked for shorts and opens. Also verify that there are no cables with loose or poor connections. RF leakage could
cause oscillation to occur under some conditions.
The rooftop antenna (Donor Antenna), if directional, should be checked for proper alignment along the calculated compass heading.
Typically, the directional antenna would be aimed at the same site that your handset uses, but it may not always be so. It is critical the
installer contact the service provider for information on, and approval of, the site he or she has selected before
the system is turned on.
If cables and alignment are acceptable and a problem persists, it may be necessary to use a spectrum analyzer to examine the signal
environment in which the unit is operating. The existence of strong adjacent channel signals within the frequency band(s) can cause the
AGC to reduce the amplifi er’s gain or cause alarms. In some cases additional fi ltering or attenuation might be required to reject these
unwanted signals. In some instances, the donor antenna can be reoriented horizontally, to place the interference source in an antenna
pattern “null”. There also may be some cases where the interference from outside signals is so great that they cannot be fi ltered or otherwise reduced or eliminated without expensive and possibly prohibitive measures. In these cases it may not be practical to use the CSI
repeater for providing coverage to these sites.
There are no physical connections provided to specifi cally communicate system or alarm status. This information is embedded in the
information accessible via the communication ports described earlier.
Monitoring & Alarms
System Set-Up Considerations
Selection of external attenuators to be used in line with the Antenna Port(s)
HIGHLOW/COM
ETHERNETUSB
STATUS 2STATUS 1
A
COM
HIGH LOW/COM
SERVER DONOR
Input: One dual band duplex port, from the dual band donor.
Output: One dual band duplex port, to the DAS.
1:1 Port Confi guration
-10-
If a CSI repeater is installed in an area with very strong desired and/or undesired signals, it is important to ensure that the overall signal
levels are optimized to be within the best operating range of the repeater. Additionally, de-sensing of a nearby base station site must be
avoided. These goals can be accomplished by properly attenuating the antenna port(s) in the path of the donor antenna(s). In effect,
one can imagine that the particular repeater deployment is electrically moved farther from the base station using attenuators that are
equivalent to increasing the path loss from the donor antenna to the base station. The following potential outcomes result from the use
of attenuators on the donor port(s) of the unit: Uplink output power, as reported by the repeater, is reduced by the value of the attenuation, protecting nearby base stations. Downlink signal to noise ratio is high at the point of the attenuator, resulting in slight but negligible
reduction in downlink performance. Other performance is essentially unchanged.
Donor Port
Server port attenuation may also be necessary, particularly where a powered DAS is present. The selection guidelines below apply to
both server and donor ports. In order to properly measure uplink signal strength, a signal generator should be used. If a signal generator
is not available, placing a test call while under the server antenna with the least path loss to the repeater should provide reasonable data.
The following potential outcomes result from the use of attenuators on the server port(s) of the CSI repeater: Downlink output power, as
reported by the unit, is reduced by the value of the attenuation. Uplink incoming power from the DAS is reduced, along with potentially
strong and/or harmful out-of-band signals (including noise) that are generated by the DAS.
Server Port
Attenuator Selection Guidelines
Accurate attenuator values need to be chosen to ensure that the maximum total power (higher of Composite or In-Band Input) applied to
the donor and server port(s) does not exceed the following thresholds:
Input Signal Max Gain Input Signal Max Gain
<-45 dBm 85 dB -32.2 dBm 69 dB
-44.3 dBm 84 dB -31.4 dBm 68 dB
-43.6 dBm 83 dB -30.6 dBm 67 dB
-42.9 dBm 82 dB -29.8 dBm 66 dB
-42.2 dBm 81 dB -29 dBm 65 dB
-41.5 dBm 80 dB -28.2 dBm 64 dB
-40.6 dBm 79 dB -27.4 dBm 63 dB
-39.7 dBm 78 dB -26.6 dBm 62 dB
-38.8 dBm 77 dB -25.8 dBm 61 dB
-37.9 dBm 76 dB -25 dBm 60 dB
-37 dBm 75 dB -24.4 dBm 59 dB*
-36.2 dBm 74 dB -23.8 dBm 58 dB*
-35.4 dBm 73 dB -23.2 dBm 57 dB*
-34.6 dBm 72 dB -22.6 dBm 56 dB*
-33.8 dBm 71 dB -22 dBm < 55 dB*
-33 dBm 70 dB
*We recommend padding this level due to potential for fl uctuating signal.
-25 dBm is the maximum input signal level that should be applied to the repeater, even if the gain is lower than 55 dB.
Input signals exceeding these thresholds will result in composite input attenuation, called “ADC Protect” (Analog to Digital Converter
Protection). Output power is reduced whenever the above thresholds are exceeded by reducing the gain by 1dB for each 1 dB that the
threshold is exceeded. ADC Protect should not be confused with AGC (Automatic Gain Control), which reduces gain to prevent In-Band
(measured) output power from exceeding the specifi ed maximum output level. To determine the total power applied to the donor and
server ports, please reference the “Composite Input” values as reported in the Web (“System Status”) or Menu (“Link Status”) interfaces
(depicted and explained later in this manual).
Large delta’s between in-band and composite input signals:
Care should be taken to isolate the best donor site to ensure the least possible delta between in-band and composite downlink signals. If
the (downlink) composite input exceeds the in-band input by more than 3 dB for the LTE band the maximum output power will be reduced.
-11-
Mounting the Digital Repeater
The following diagrams illustrate the methods for mounting the repeater in a typical wall or rack installation.
Brackets provided serve for both options.
Step 2: Mark the location of the wall anchoring
holes and drill. The wall anchoring
system you use for the repeater will
need to be able to support at least 46
lbs/ 21kg. Install wall anchors and
hang repeater as shown.
Step 1: Install the wall mount brackets
as shown in the drawing to the right.
Wall Mounting
19” Relay Rack Mounting
Mount the repeater as shown and secure
front panel with screws. Note: the CSI digital
repeaters must be supported in the 19” Relay
Rack system with a shelf.
Do not rely on the
front panel mount exclusively to support
all the weight of the unit.
Install slid brackets on repeater as shown in
the tapped holes provided. Slid repeater into
the receiving brackets and secure with screws.
The repeater must be supported in the rack
system with slide rail. Do not rely on the
front panel mount exclusively to support
all the weight of the unit.
19” Four Post Rack Mounting
-12-
A complete line of accessories is available from Cellular Specialties, Inc. Check with your CSI distributor for any additional items
needed. Below are just a few examples suitable for most in-building needs.
•Directional Couplers
6dB - model number: CSI-DC6/700-2.7K/N
10dB - model number: CSI-DC10/700-2.7K/N
15dB - model number: CSI-DC15/700-2.7K/N
20dB - model number: CSI-DC20/700-2.7K/N
30dB - model number: CSI-DC30/700-2.7K/N
•Outside Donor Antenna
Panel - model number: CSI-AP/698/2.2K/7-10
•UPS
Battery backup, 2 hr Single band
1 hour dual band - model number: CS48-985-600
Battery backup, 4 hr Single band
2 hour dual band - model number: CS48-985-601
•Power Dividers
2:1 - model number: CSI-SPD2/700-2.7K/N
3:1 - model number: CSI-SPD3/700-2.7K/N
4:1 - model number: CSI-SPD4/700-2.7K/N
•Grounding Kit - model number: CSI-GKIT
•Lightning Arrestor - model number: CSI-CAP
•Inside Omnidirectional Antenna
Quad-band - model number: CSI-AO/700/2.7K/3
Optional Accessories
• Inadequate isolation between the outside and inside antennas may cause regenerative feedback in the system. This feedback can
cause the amplifi er to emit a continuous signal at maximum amplitude and, in some cases, interfere with normal operation of the donor
site. Careful consideration of the layout and placement of the system is imperative to minimize this possibility and to minimize the amount
of signal leaking from the building. See installation tips below for general guidelines.
• The installer should refer to the Safety Guidelines section on page 4 and the Important Safety Information section on page 5 for
proper antenna selection and installation. To avoid serious injury or death and damage to the repeater, do not install donor or server
antennas near overhead power lines or high power components. Allow enough distance so that if antennas should fall they will not come
in contact with those components.
• Close proximity to the donor or server antennas with the repeater in operation may expose the user or installer to RF fi elds that
exceed FCC limits for human exposure.
WARNING! AMPLIFIER OR HANDSET DAMAGE MAY OCCUR IF A HANDSET IS CONNECTED DIRECTLY TO THE REPEATER
OR THE COAX THAT LEADS TO THE REPEATER.
Important Installation Notes
Donor Antenna
1. Accurately determine the azimuth to the donor cell site . Obtain the donor site information and approval from the
service provider/carrier.
2. Ensure that the radiation path to the donor cell site is as unobstructed as possible.
3. Mount the donor antenna at or toward the edge of the roof, in the direction of the donor site. Try to avoid having the RF
signal from the donor pass above the location(s) of the service antennas. Normally the service antennas will be behind
and below the donor antenna if viewed from above. This approach will help avoid interference and feed back both, to and
from the service antennas.
4. Normally mounting the donor antenna higher will allow a less obstructed path to the donor site. However, in high traffi c
metro areas avoid mounting the donor antenna any higher than necessary as the quality of the donor signal may start to
become less stable and it is more likely to encounter adjacent channel interference.
5. When possible shield the donor antenna’s back side by locating it so that any HVAC units and/or penthouse structures are
behind the antenna relative to the donor cell site location.
Installation Tips
Indoor Antennas
1. Use omnidirectional antennas (see optional accessories) indoors, and locate them centrally with respect to the intended
coverage area to minimize signal leakage to the outside. Use directional antennas indoors only in special cases when higher
gain and directionality would be helpful and RF exposure limits will not be exceeded.
2. To avoid repeater uplink overload and gain limiting mount the indoor antennas away from areas where mobile subscribers
frequently use their phones such as desks or dispatch areas.
•Cross Band Couplers
Quad band Rack Mount: CSI-CM250-7/C/AW/P
(700 LTE, Cell, AWS and PCS)
Quad band Wall Mount: CSI-CBC/696-2170/N
(700 LTE, Cell, AWS and PCS)
Tri band Rack Mount: CSI-CM250-U7C/C/P
(700 Upper C LTE, Cell and PCS)
Tri band Wall Mount: CSI-CBC21/740-1990/N
(700 Upper C LTE, Cell and PCS)
Tri band Rack Mount: CSI-CM250-L7AB/C/P
(700 Lower A/B LTE, Cell and PCS)
Tri band Wall Mount: CSI-CBC21/696-1990/N
(700 Lower A/B LTE, Cell and PCS)
Loading...