Huawei Technologies RRU3256-2500 Remote Radio Unit User Manual RRU3252 RRU3256 Hardware Description

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DBS3900
V100R005C00
RRU3252/RRU3256 Hardware
Description
Issue
Draft A
Date
2012-11-30
HUAWEI TECHNOLOGIES CO., LTD.
Copyright © Huawei Technologies Co., Ltd. 2012. All rights reserved.
No part of this document may be reproduced or transmitted in any form or by any means without prior written
consent of Huawei Technologies Co., Ltd.
Trademarks and Permissions
and other Huawei trademarks are trademarks of Huawei Technologies Co., Ltd.
All other trademarks and trade names mentioned in this document are the property of their respective holders.
Notice
The purchased products, services and features are stipulated by the contract made between Huawei and the
customer. All or part of the products, services and features described in this document may not be within the
purchase scope or the usage scope. Unless otherwise specified in the contract, all statements, information,
and recommendations in this document are provided "AS IS" without warranties, guarantees or representations
of any kind, either express or implied.
The information in this document is subject to change without notice. Every effort has been made in the
preparation of this document to ensure accuracy of the contents, but all statements, information, and
recommendations in this document do not constitute a warranty of any kind, express or implied.
Huawei Technologies Co., Ltd.
Address:
Huawei Industrial Base
Bantian, Longgang
Shenzhen 518129
People's Republic of China
Website:
http://www.huawei.com
Email:
support@huawei.com
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RRU3252/RRU3256 Hardware Description
About This Document
About This Document
Purpose
This document provides reference for planning and deploying an RRU3252/RRU3256 (referred
to as RRU in this document). It presents the exterior and describes the ports, functions, cable
types, connector specifications, and cable connections of the RRU.
Product Version
The following table lists the product version related to this document.
Product Name
Product Version
DBS3900 LTE TDD
V100R005C00 and later versions
Intended Audience
This document is intended for:
Base station installation engineers
System engineers
Site maintenance engineers
Organization
1 Change History
This chapter describes changes in the RRU3252/RRU3256 Hardware Description.
2 RRU Introduction
This chapter describes the RRU.
3 RRU Cables
This chapter describes RRU cables.
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About This Document
4 RRU Auxiliary Devices
This chapter describes remote radio unit (RRU) auxiliary devices.
Conventions
Symbol Conventions
The symbols that may be found in this document are defined as follows.
Symbol
Description
Indicates a hazard with a high level of risk, which if not
avoided, will result in death or serious injury.
Indicates a hazard with a medium or low level of risk, which
if not avoided, could result in minor or moderate injury.
Indicates a potentially hazardous situation, which if not
avoided, could result in equipment damage, data loss,
performance degradation, or unexpected results.
Indicates a tip that may help you solve a problem or save
time.
Provides additional information to emphasize or supplement
important points of the main text.
General Conventions
The general conventions that may be found in this document are defined as follows.
Convention
Description
Times New Roman
Normal paragraphs are in Times New Roman.
Boldface
Names of files, directories, folders, and users are in
boldface. For example, log in as user root.
Italic
Book titles are in italics.
Courier New
Examples of information displayed on the screen are in
Courier New.
Command Conventions
The command conventions that may be found in this document are defined as follows.
Convention
Description
Boldface
The keywords of a command line are in boldface.
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About This Document
Convention
Description
Italic
Command arguments are in italics.
[]
Items (keywords or arguments) in brackets [ ] are optional.
{ x | y | ... }
Optional items are grouped in braces and separated by
vertical bars. One item is selected.
[ x | y | ... ]
Optional items are grouped in brackets and separated by
vertical bars. One item is selected or no item is selected.
{ x | y | ... }*
Optional items are grouped in braces and separated by
vertical bars. A minimum of one item or a maximum of all
items can be selected.
[ x | y | ... ]*
Optional items are grouped in brackets and separated by
vertical bars. Several items or no item can be selected.
GUI Conventions
The GUI conventions that may be found in this document are defined as follows.
Convention
Description
Boldface
Buttons, menus, parameters, tabs, window, and dialog titles
are in boldface. For example, click OK.
Multi-level menus are in boldface and separated by the ">"
signs. For example, choose File > Create > Folder.
Keyboard Operations
The keyboard operations that may be found in this document are defined as follows.
Format
Description
Key
Press the key. For example, press Enter and press Tab.
Key 1+Key 2
Press the keys concurrently. For example, pressing Ctrl+Alt
+A means the three keys should be pressed concurrently.
Key 1, Key 2
Press the keys in turn. For example, pressing Alt, A means
the two keys should be pressed in turn.
Mouse Operations
The mouse operations that may be found in this document are defined as follows.
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Action
Description
Click
Select and release the primary mouse button without moving
the pointer.
Double-click
Press the primary mouse button twice continuously and
quickly without moving the pointer.
Drag
Press and hold the primary mouse button and move the
pointer to a certain position.
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Contents
Contents
About This Document.....................................................................................................................ii
1 Change History..............................................................................................................................1
2 RRU Introduction..........................................................................................................................2
2.1 RRU Exterior......................................................................................................................................................3
2.2 RRU Ports...........................................................................................................................................................4
2.3 RRU Indicators...................................................................................................................................................5
3 RRU Cables.....................................................................................................................................8
3.1 RRU Cable List................................................................................................................................................10
3.2 RRU PGND Cable............................................................................................................................................11
3.3 RRU Power Cable............................................................................................................................................12
3.4 RRU Alarm Cable............................................................................................................................................12
3.5 CPRI Fiber Optic Cable....................................................................................................................................14
3.6 RGPS Jumper...................................................................................................................................................17
3.7 SFP High-Speed Cable for Cascaded RRUs....................................................................................................18
3.8 RRU RF Jumper...............................................................................................................................................18
3.9 RRU AISG Multi-Wire Cable..........................................................................................................................19
3.10 RRU AISG Extension Cable..........................................................................................................................20
4 RRU Auxiliary Devices..............................................................................................................22
4.1 IFS06................................................................................................................................................................23
4.2 OCB..................................................................................................................................................................24
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1 Change History
Change History
This chapter describes changes in the RRU3252/RRU3256 Hardware Description.
Draft A (2012-11-30)
This is a draft.
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2 RRU Introduction
RRU Introduction
About This Chapter
This chapter describes the RRU.
The RRU performs the following functions:
Exchanges baseband data with a BBU.
Receives RF signals from the antenna system, converts the received signals into IF signals,
amplifies the IF signals, and performs analog-to-digital conversion. The TX channel filters
downlink signals, performs digital-to-analog conversion, and converts IF signals into
signals applicable to the TX band.
Multiplexes RX and TX signals on the RF channel, which enables these signals to share
the same antenna path. It also filters RX and TX signals.
2.1 RRU Exterior
This section describes the exterior and dimensions of an RRU.
2.2 RRU Ports
This section describes ports on the RRU panels. An RRU has a bottom panel, cabling cavity
panel, and indicator panel.
2.3 RRU Indicators
This section describes six indicators on an RRU. They indicate the running status.
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2.1 RRU Exterior
This section describes the exterior and dimensions of an RRU.
Figure 2-1 shows an RRU.
Figure 2-1 RRU exterior
Figure 2-2 shows RRU dimensions.
Figure 2-2 RRU dimensions
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2.2 RRU Ports
This section describes ports on the RRU panels. An RRU has a bottom panel, cabling cavity
panel, and indicator panel.
Figure 2-3 shows the ports on the RRU panels.
Figure 2-3 Ports on the RRU panels
Table 2-1 describes ports and indicators on the RRU panels.
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Table 2-1 Ports and indicators on the RRU panels
Item
Label
Description
(1) Ports at the bottom
ANT0-ANT3
TX/RX ports. ANT0 port supports RET signal
transmission.
RET/EXT_ALM
Communication port for the RET antenna or
port for alarm reporting, supporting RET
signal transmission
RGPS
RGPS port, which is optional.
CPRI0/IR0
Optical port
(2) Ports in the cabling
cavity
CPRI1/IR1
RTN(+)
Power supply socket
NEG(-)
(3) Indicators
RUN
For details, see 2.3 RRU Indicators.
ALM
ACT
VSWR
CPRI0/IR0
CPRI1/IR1
NOTE
If only two RF ports are required, ANT0 and ANT1 are used by default.
The RET ports to be used are determined by the software configuration.
2.3 RRU Indicators
This section describes six indicators on an RRU. They indicate the running status.
For the specific positions of RRU indicators, see 2.2 RRU Ports.
Table 2-2 describes RRU indicators.
Table 2-2 Indicators on the RRU
Label
Color
Status
Description
RUN
Green
Steady on
There is power supply, but the module
is faulty.
Steady off
There is no power supply, or the
module is faulty.
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Label
ALM
ACT
VSWR
CPRI0/
IR0
CPRI1/
IR1
Issue Draft A (2012-11-30)
Color
Red
Green
Red
Red or
green
Red or
green
2 RRU Introduction
Status
Description
Blinking on for 1s and off
for 1s
The module is working properly.
Blinking on for 0.125s and
off for 0.125s
Software is being loaded to the
module, or the module is not started.
Steady on
Alarms are generated, and the module
must be replaced.
Steady off
No alarm is generated.
Blinking on for 1s and off
for 1s
Alarms are generated. The alarms
may be caused by the faults on the
related modules or ports. Therefore,
the necessity for module replacement
is uncertain.
Steady on
The module is working properly with
TX channels enabled or software is
being loaded without RRU running.
Blinking on for 1s and off
for 1s
The module is working properly with
TX channels disabled.
Steady off
No VSWR alarm is generated.
Steady on
A VSWR alarm is generated.
Steady green
The CPRI link is functioning
properly.
Steady red
An optical module fails to transmit or
receive signals possibly because the
optical module is faulty or the optical
fiber cable is broken.
Blinking red on for 1s and
off for 1s
The CPRI link is out of lock possibly
because of mutual lock of dual-mode
clock sources or mismatched data
rates over CPRI ports. (You are
advised to check the system
configuration to rectify the fault.)
Steady off
The SFP module is not properly
installed, or the optical module is
powered off.
Steady green
The CPRI link is functioning
properly.
Steady red
An optical module fails to transmit or
receive signals possibly because the
optical module is faulty or the optical
fiber cable is broken.
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Label
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Color
2 RRU Introduction
Status
Description
Blinking red on for 1s and
off for 1s
The CPRI link is out of lock possibly
because of mutual lock of dual-mode
clock sources or mismatched data
rates over CPRI ports. (You are
advised to check the system
configuration to rectify the fault.)
Steady off
The SFP module is not properly
installed, or the optical module is
powered off.
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3 RRU Cables
RRU Cables
About This Chapter
This chapter describes RRU cables.
3.1 RRU Cable List
This section describes RRU cable connections.
3.2 RRU PGND Cable
An RRU PGND cable connects an RRU and a ground bar, ensuring the proper grounding of the
RRU.
3.3 RRU Power Cable
An RRU power cable is a -48 V DC shielded cable. It feeds -48 V DC power into an RRU.
3.4 RRU Alarm Cable
An RRU alarm cable, a shielded straight-through cable, transmits alarm signals from an external
device to RRUs so that the base station can monitor the operating status of external devices.
3.5 CPRI Fiber Optic Cable
CPRI fiber optic cables are classified into multi-mode fiber optic cables and single-mode fiber
optic cables. They transmit CPRI signals.
3.6 RGPS Jumper
A PGPS jumper connects a RGPS antenna to an RRU.
3.7 SFP High-Speed Cable for Cascaded RRUs
This section describes the SFP high-speed cable for cascaded RRUs. An SFP high-speed cable
for cascaded RRUs connects common public radio interface (CPRI) ports between two RRUs
and transmits CPRI signals between RRUs. SFP is short for small form-factor pluggable while
RRU is short for remote radio unit.
3.8 RRU RF Jumper
A 1/2" RRU RF jumper transmits and receives RF signals.
3.9 RRU AISG Multi-Wire Cable
This section describes a remote radio unit (RRU) AISG multi-wire cable with the length of 5 m.
It connects an RRU and a remote control unit (RCU) to transmit control signals from an eNodeB
to the remote electrical tilt (RET) antenna. When the RRU is connected to the RET antenna, an
AISG multi-wire cable transmits RS485 signals.
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3.10 RRU AISG Extension Cable
This section describes the remote radio unit (RRU) AISG extension cable. When the distance
between an RRU and a remote control unit (RCU) is longer than 5 m, an AISG multi-wire cable
is not long enough to connect the RRU and the RCU. In this case, an AISG extension cable is
used to extend the AISG multi-wire cable for transmitting RS485 signals.
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3.1 RRU Cable List
This section describes RRU cable connections.
Table 3-1 lists RRU cables.
Table 3-1 RRU cables
Cable
One End
The Other End
Connector
Connected
to...
Connector
Connected to...
3.2 RRU
PGND Cable
OT terminal
(M6)
Ground
terminal on the
RRU
OT terminal
(M8)
Ground terminal
on the ground bar
3.3 RRU Power
Cable
Tool-less
female
connector
(pressfit type)
NEG(-) and
RTN(+) ports
on the RRU
Tool-less female
connector
(pressfit type)
One of RRU0 to
RRU5 ports on
the EPS
OT terminal
(M4)
One of LOAD0
to LOAD5 ports
on the DCDU
One of LOAD4
to LOAD9 ports
on the PDU
3.5 CPRI Fiber
Optic Cable
DLC connector
CPRI0/IR0 port
on the RRU
DLC connector
CPRI1/IR1 port
on the RRU
CPRI port on the
LBBP in the
BBU
CPRI0/IR0 port
on the RRU
3.8 RRU RF
Jumper
Type N
connector
ANT0 to ANT3
ports on the
RRU
Type N
connector
Antenna system
3.6 RGPS
Jumper
(optional)
Waterproofed
DB15
connector
Remote Global
Positioning
System (RGPS)
port at the RRU
bottom
Round 12-pin
connector
RGPS antenna
3.7 SFP HighSpeed Cable
for Cascaded
RRUs
(optional)
SFP20 male
connector
CPRI1 port on
the RRU
SFP20 male
connector
CPRI0 port on
the RRU
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Cable
3 RRU Cables
One End
The Other End
Connector
Connected
to...
Connector
Connected to...
3.4 RRU
Alarm Cable
(optional)
Waterproofed
DB9 male
connector
RET/
EXT_ALM
port on the
RRU
Cord end
terminal
External alarm
device
3.9 RRU AISG
Multi-Wire
Cable
(optional)
Waterproofed
DB9 male
connector
RET/
EXT_ALM
port on the
RRU
Standard AISG
female connector
Standard AISG
male connector
on the remote
control unit
(RCU) or on the
AISG extension
cable
3.10 RRU
AISG
Extension
Cable
(optional)
Standard AISG
male connector
Standard AISG
female
connector on
the AISG multiwire cable
Standard AISG
female connector
Standard AISG
male connector
on the RCU
3.2 RRU PGND Cable
An RRU PGND cable connects an RRU and a ground bar, ensuring the proper grounding of the
RRU.
Exterior
An RRU PGND cable is green or green and yellow, both ends of the cable are OT terminals. If
the customer prepares the PGND cable, a copper-core cable with a minimum cross-sectional
area of 16 mm2 (0.025 in.2) is recommended. Figure 3-1 shows a PGND cable.
Figure 3-1 PGND cable
(1) OT terminal (M6)
(2) OT terminal (M8)
OT terminals must be added to both ends of a PGND cable onsite.
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3.3 RRU Power Cable
An RRU power cable is a -48 V DC shielded cable. It feeds -48 V DC power into an RRU.
Exterior
An RRU power cable has an easy power receptacle (pressfit type) connector at one end and bare
wires at the other end. Proper terminals are added to the bare wires based on the connector on
the external power device, as shown in Figure 3-2.
The cross-sectional area of an RRU power cable can be either 3.3 mm2 (0.005 in.2)/5.3 mm2
(0.008 in.2) or 4 mm2 (0.006 in.2)/6 mm2 (0.009 in.2). The former complies with North American
standards and the latter complies with European standards.
Figure 3-2 RRU power cable
Pin Assignment
The DC power input cable is a two-wire cable. Table 3-2 and Table 3-3 describe the pin
assignment for the wires of a DC power input cable.
Table 3-2 Pin assignment for the wires of a DC power input cable (North American standards)
Wire
Color
NEG(-)
Blue
RTN(+)
Black
Table 3-3 Pin assignment for the wires of a DC power input cable (European standards)
Wire
Color
NEG(-)
Blue
RTN(+)
Brown
3.4 RRU Alarm Cable
An RRU alarm cable, a shielded straight-through cable, transmits alarm signals from an external
device to RRUs so that the base station can monitor the operating status of external devices.
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Exterior
An alarm cable has a DB9 connector at one end and eight cord end terminals at the other end,
as shown in Figure 3-3.
Figure 3-3 RRU alarm cable
(1) DB9 waterproof connector
(2) Cord end terminal
Pin Assignment
Table 3-4 describes the pin assignment for the wires of an RRU alarm cable.
Table 3-4 Pin assignment for the wires of an RRU alarm cable
RRU
Alarm
Port
Pin of the
DB9
Connecto
Wire
Color
Wire
Type
Cord End
Terminal
Description
Dry
contact
X1.2
White or
blue
Twisted
pair cable
X2
Boolean signal input 0+
X1.4
Blue
X3
Boolean signal input 0(GND)
X1.7
White or
orange
X4
Boolean signal input 1+
X1.4
Orange
X5
Boolean signal input 1(GND)
X1.6
White or
green
X6
APM RX-
X1.8
Green
X7
APM RX+
X1.5
White or
brown
X8
APM TX-
X1.3
Brown
X9
APM TX+
RS485
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Twisted
pair cable
Twisted
pair cable
Twisted
pair cable
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3.5 CPRI Fiber Optic Cable
CPRI fiber optic cables are classified into multi-mode fiber optic cables and single-mode fiber
optic cables. They transmit CPRI signals.
NOTE
l An ODF can be used when the distance between a BBU and an RRU or the distance between
interconnected RRUs is longer than 100 m (328.08 ft).
l A single-mode fiber optic cable connects a BBU to an ODF or connects an ODF to an RRU.
The maximum length of a CPRI fiber optic cable is 150 m (492.12 ft) When the fiber optical
cable connects a BBU and an RRU. The length of a CPRI fiber optic cable is 10 m (32.81 ft)
when the fiber optical cable connects two RRUs.
Exterior
Figure 3-4 shows a fiber optic cable between a BBU and an RRU or between RRUs, with a
DLC connector at each end.
Figure 3-4 Fiber optical cable between a BBU and an RRU or between RRUs
(1) DLC connector
(2) Branch optical fiber
(3) Label on the branch optical fiber
When a fiber optical cable connects a BBU and an RRU, the optical fibers on the BBU side and
RRU side are 0.34 m (0.013 in.) and 0.03 m (0.0012 in.) long, respectively. When a fiber optical
cable connects two RRUs, the optical fibers on both RRU sides are 0.03 m (0.0012 in.) long.
Figure 3-5 shows the connections for a CPRI fiber optic cable between a BBU and an RRU.
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Figure 3-5 Connections for a CPRI fiber optic cable between a BBU and an RRU
(1) CPRI fiber optic cable between a BBU and an RRU
Figure 3-6 shows a single-mode fiber optic cable between a BBU and an ODF or between an
ODF and an RRU, with a DLC connector at one end and an FC connector at the other end.
Figure 3-6 Single-mode fiber optic cable between a BBU and an ODF or between an ODF and
an RRU
(1) DLC connector
(2) Branch optical fiber
(3) Label on the branch optical fiber
(4) FC connector
When a single-mode fiber optic cable connects a BBU and an ODF, the optical fibers on the
BBU side and ODF side are 0.34 m (0.013 in.) and 0.8 m (0.031 in.) long, respectively.
When a single-mode fiber optic cable connects an ODF and an RRU, the optical fibers on the
RRU side and ODF side are 0.03 m (0.013 in.) and 0.8 m (0.031 in.) long, respectively.
Figure 3-7 shows the connections for a single-mode CPRI fiber optic cable between a BBU and
an ODF or between an ODF and an RRU.
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Figure 3-7 Connections for a single-mode fiber optic cable between a BBU and an ODF or
between an ODF and an RRU
(1) Single-mode CPRI fiber optic cable between a BBU (2) Single-mode CPRI fiber optic cable between an
and an ODF
ODF and an RRU
NOTE
A CPRI fiber optic cable must be connected to optical modules in the CPRI ports. A multi-mode fiber optic
cable and single-mode fiber optic cable are connected to multi-mode optical modules and single-mode optical
modules, respectively.
Pin Assignment
Table 3-5, Table 3-6, and Table 3-7 describe the labels on and recommended connections for
fiber optic cables of an optical assembly.
Table 3-5 Labels on and recommended connections for optical fibers of an optical assembly
between a BBU and an RRU
Label
Connected To
1A
CPRI RX port on the RRU
1B
CPRI TX port on the RRU
2A
TX port on the BBU
2B
RX port on the BBU
Table 3-6 Labels on and recommended connections for optical fibers of a fiber optic cable
between RRUs
Label
Connected To
1A
CPRI RX port on RRU 1
1B
CPRI TX port on RRU 1
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Label
Connected To
2A
CPRI TX port on RRU 0
2B
CPRI RX port on RRU 0
Table 3-7 Labels on and recommended connections for optical fibers of a single-mode optical
assembly between a BBU and an ODF or between an ODF and an RRU
Label
Connected To
1A
RX port on the BBU or CPRI RX port on the RRU
1B
TX port on the BBU or CPRI TX port on the RRU
2A
ODF
2B
ODF
3.6 RGPS Jumper
A PGPS jumper connects a RGPS antenna to an RRU.
Exterior
A RGPS jumper has a DB15 waterproof connector at one end and a round 12–pin connector at
the other end, as shown in Figure 3-8.
Figure 3-8 RGPS jumper
(1) DB15 waterproof connector
(2) Round 12-pin connector
Pin Assignment
Table 3-8 describes the pin assignment for the wires of the RGPS jumper.
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Table 3-8 Pin assignment for the wires of the RGPS jumper
X1 (Pin for the
DB15 Waterproof
Connector)
X2 (Pin for the
Round 12-pin
Connector)
Color
X1.1
X2.9
White and
blue
X1.6
X2.1
Blue
X1.14
X2.5
White and
orange
X1.13
X2.4
Orange
X1.12
X2.3
White and
green
X1.11
X2.2
Green
X1.2
X2.11
White and
brown
X1.7
X2.12
Brown
Type
Description
Twisted
pair
GND
Twisted
pair
Twisted
pair
+28 V
RXD_422+
RXD_422TXD_422+
TXD_422-
Twisted
pair
1PPS_422+
1PPS_422-
3.7 SFP High-Speed Cable for Cascaded RRUs
This section describes the SFP high-speed cable for cascaded RRUs. An SFP high-speed cable
for cascaded RRUs connects common public radio interface (CPRI) ports between two RRUs
and transmits CPRI signals between RRUs. SFP is short for small form-factor pluggable while
RRU is short for remote radio unit.
Exterior
Figure 3-9 shows an SFP high-speed cable for cascaded RRUs.
Figure 3-9 SFP high-speed cable for cascaded RRUs
3.8 RRU RF Jumper
A 1/2" RRU RF jumper transmits and receives RF signals.
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Exterior
An RF jumper has a Type N male connector at both ends, as shown in Figure 3-10.
Figure 3-10 RF jumper
(1) Type N male connector
3.9 RRU AISG Multi-Wire Cable
This section describes a remote radio unit (RRU) AISG multi-wire cable with the length of 5 m.
It connects an RRU and a remote control unit (RCU) to transmit control signals from an eNodeB
to the remote electrical tilt (RET) antenna. When the RRU is connected to the RET antenna, an
AISG multi-wire cable transmits RS485 signals.
NOTE
An RCU is a driving motor used for the phase shifter in the RET antenna. It receives control commands from
an eNodeB and runs the commands to drive the stepper motor. Using a gear, the stepper motor drives the
adjustable phase shifter in the antenna and changes the downtilt angle.
Exterior
An AISG multi-wire cable has a waterproofed DB9 male connector at one end and a standard
AISG female connector at the other end, as shown in Figure 3-11.
Figure 3-11 AISG multi-wire cable
1. DB9 waterproof male connector
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2. Standard AISG female connector
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Pin Assignment
Table 3-9 describes the pin assignment for the core wires of an AISG multi-wire cable.
Table 3-9 Pin assignment for the core wires of an AISG multi-wire cable
X1 End (Pin of the
Waterproofed
DB9 Male
Connector)
X1.1
X2 End (Pin of the
Standard AISG
Female Connector)
Color of
the Core
Wire
X2.1
White and
blue
Blue
Type of
the Core
Wire
Twisted
pair
Description
+12 V
X1.3
X2.3
White and
orange
X1.5
X2.5
Orange
X1.4
X2.4
White and
green
GND
X1.9 is connected to
X1.4.
GND
X2.1 is connected to
X2.6.
+12 V
X2.4 is connected to
X2.7.
GND
Twisted
pair
RS485 B
RS485 A
3.10 RRU AISG Extension Cable
This section describes the remote radio unit (RRU) AISG extension cable. When the distance
between an RRU and a remote control unit (RCU) is longer than 5 m, an AISG multi-wire cable
is not long enough to connect the RRU and the RCU. In this case, an AISG extension cable is
used to extend the AISG multi-wire cable for transmitting RS485 signals.
Exterior
An AISG extension cable has a standard AISG male connector at one end and a standard AISG
female connector at the other end, as shown in Figure 3-12.
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Figure 3-12 AISG extension cable
1. Standard AISG male connector
2. Standard AISG female connector
Pin Assignment
Table 3-10 describes the pin assignment for the core wires of an AISG extension cable.
Table 3-10 Pin assignment for the core wires of an AISG extension cable
X1 End (Pin
of the
Standard
AISG Male
Connector)
X2 End (Pin
of the
Standard
AISG
Female
Connector)
Color of the
Core Wire
Type of the
Core Wire
Description
X1.1
X2.1
White and blue
Twisted pair
+12 V
Twisted pair
DC Return A
Twisted pair
RS485 B
Blue
X1.7
X2.7
White and orange
Orange
X1.3
X2.3
White and green
X1.5
X2.5
Green
X1.6
X2.6
White and brown
RS485 A
Twisted pair
+24 V
Brown
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RRU Auxiliary Devices
About This Chapter
This chapter describes remote radio unit (RRU) auxiliary devices.
4.1 IFS06
An Indoor Floor installation Support (IFS06) is used for installing indoor RRUs.
4.2 OCB
An Outdoor Cable Conversion Box (OCB) interconnects cables of different core diameters.
Power cables shipped with RRUs cannot support long-distance power supply. Therefore, when
power supply is far from the equipment, cables with large core diameters are used, and an OCB
connects these cables and RRU power cables.
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4.1 IFS06
An Indoor Floor installation Support (IFS06) is used for installing indoor RRUs.
Exterior
Figure 4-1 shows an IFS06.
Figure 4-1 IFS06
Function
It can be installed on the ground.
The upper and lower adjustable beams on an IFS06 can be moved up and down to fit for
heights of RRUs.
Structure
The IFS06 consists of the main frame, cable tray, upper and lower adjustable beams, and front
and rear feet, as shown in Figure 4-2.
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Figure 4-2 IFS06 structure
(1) Upper adjustable beam
(2) Main frame
(3) Lower adjustable beam
(4) Front foot
(5) Rear foot
(6) Cable tray
Specifications
Table 4-1 describes IFS06 specifications.
Table 4-1 IFS06 specifications
Item
Specification
Dimensions
1730 mm (79 in.) x 600 mm (23.62 in.) x 600 mm (23.62 in.)
(H x W x D)
Weight
45 kg (99.23 lb)
4.2 OCB
An Outdoor Cable Conversion Box (OCB) interconnects cables of different core diameters.
Power cables shipped with RRUs cannot support long-distance power supply. Therefore, when
power supply is far from the equipment, cables with large core diameters are used, and an OCB
connects these cables and RRU power cables.
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Application Scenario of an OCB
Figure 4-3 shows the application scenario of an OCB.
Figure 4-3 Application scenario of an OCB
For details about the structure, functions, installation, and maintenance of an OCB, see the OCB
User Guide.
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