321684157-AAU3920-Hardware-Description-02-PDF-En.Pdf

AAU3920
Hardware Description
Issue 02
Date 2015-07-30
HUAWEI TECHNOLOGIES CO., LTD.

Copyright © Huawei Technologies Co., Ltd. 2015. 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
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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
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The information in this document is subject to change without notice. Every effort has been made in the
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Huawei Technologies Co., Ltd.
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Email: support@huawei.com
Issue 02 (2015-07-30) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
i

About This Document
Overview
This document provides reference information for deploying AAU3920s (shortened to AAUs).
Such information includes the AAU exterior, ports and indicators on an AAU, logical structure,
engineering specifications, and cable types.
The exteriors of components or cables in this document are for reference only. The actual
exteriors may be different.
Product Version
The following table lists the product versions related to this document.
Product Name Solution Version Product Version
DBS3900 l SRAN9.0, SRAN10.1
and later
l GBSS16.0, GBSS17.1
and later
l RAN16.0, RAN17.1 and
later
l eRAN7.0, eRAN8.1 and
later
V100R009C00,
V100R010C10 and later
Intended Audience
l System personnel
l Installation engineers
l Maintenance engineers
Organization
1 Changes in AAU3920 Hardware Description
AAU3920
Hardware Description About This Document
ii

This chapter describes the changes in AAU3920 Hardware Description.
2 AAU Introduction
This chapter describes the exterior, functions, slot assignment, ports, indicators, remote electrical
tilt (RET) system, and engineering specifications of an AAU.
3 Optical Modules
An optical module transmits optical signals between an optical port and a fiber optic cable.
4 AAU Cables
This chapter describes AAU cables.
Conventions
Symbol Conventions
The symbols that may be found in this document are defined as follows.
Symbol Description
Indicates an imminently hazardous situation which, if not
avoided, will result in death or serious injury.
Indicates a potentially hazardous situation which, if not
avoided, could result in death or serious injury.
avoided, may result in minor or moderate injury.
avoided, could result in equipment damage, data loss,
performance deterioration, or unanticipated results.
NOTICE is used to address practices not related to personal
injury.
Calls attention to important information, best practices and
tips.
NOTE is used to address information not related to personal
injury, equipment damage, and environment deterioration.
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.
AAU3920
iii

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.
Boldface The keywords of a command line are in boldface.
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.
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.
AAU3920
iv

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.
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.
AAU3920
v

Contents
About This Document.....................................................................................................................ii
1 Changes in AAU3920 Hardware Description..........................................................................1
2 AAU Introduction..........................................................................................................................2
2.1 Exterior of an AAU........................................................................................................................................................3
2.2 Functions of an AAU......................................................................................................................................................5
2.3 Configurations of an AAU.............................................................................................................................................7
2.4 Ports and Indicators on an AAU.....................................................................................................................................9
2.5 RET System of an AAU...............................................................................................................................................14
2.6 Engineering Specifications of an AAU........................................................................................................................17
3 Optical Modules..........................................................................................................................18
4 AAU Cables..................................................................................................................................20
4.1 AAU Cable List............................................................................................................................................................21
4.2 AAU PGND Cable.......................................................................................................................................................22
4.3 AAU Power Cable........................................................................................................................................................23
4.4 CPRI Fiber Optic Cable................................................................................................................................................24
4.5 Feeder...........................................................................................................................................................................28
4.6 AISG Multi-Wire Cable...............................................................................................................................................29
4.7 AISG Extension Cable..................................................................................................................................................30
AAU3920
Hardware Description Contents
vi

1Changes in AAU3920 Hardware Description
This chapter describes the changes in AAU3920 Hardware Description.
02 (2015-07-30)
This is the second commercial release.
Compared with the issues 01 (2015-03-23), this issue does not include any new topics or exclude
any topics.
Compared with the issues 01 (2015-03-23), this issue includes the following changes.
Topic Change Description
The whole document Some figure updates caused by the structure
modification of the AAU.
01 (2015-03-23)
This is the first commercial release.
Compared with the issues Draft A (2015-01-15), this issue does not include any changes.
Draft A (2015-01-15)
This is a draft.
AAU3920
Hardware Description 1 Changes in AAU3920 Hardware Description
1

2AAU Introduction
About This Chapter
This chapter describes the exterior, functions, slot assignment, ports, indicators, remote electrical
tilt (RET) system, and engineering specifications of an AAU.
2.1 Exterior of an AAU
This section describes the exterior, dimensions, and components of an AAU.
2.2 Functions of an AAU
The function of an AAU is performed by the functional modules (AU and RU).
2.3 Configurations of an AAU
This section describes the configuration of an AAU.
2.4 Ports and Indicators on an AAU
This section describes ports and indicators on an AAU.
2.5 RET System of an AAU
The remote electrical tilt (RET) system of an AAU consists of the remote control unit (RCU),
motor, gearing, and phase shifter. In the RET system, the RCU is used to remotely adjust the
downtilts of AU beams.
2.6 Engineering Specifications of an AAU
This section describes engineering specifications of an AAU, including input power and
equipment specifications.
AAU3920
Hardware Description 2 AAU Introduction
2

2.1 Exterior of an AAU
This section describes the exterior, dimensions, and components of an AAU.
Exterior
The following figure shows the exterior of an AAU.
Figure 2-1 Exterior of an AAU
Dimensions
The following figure shows the dimensions of an AAU.
AAU3920
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Figure 2-2 Dimensions of an AAU
Components
NOTE
l Active antenna-antenna unit (AAAU): the antenna unit on an active antenna (shortened to AU)
l Active antenna-radio unit (AARU): the radio unit on an active antenna (shortened to RU)
An AAU has one composition, that is, one RU is configured on an AU. The following figure
shows the composition.
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Figure 2-3 AAU composition
(1) AU (2) RU
2.2 Functions of an AAU
The function of an AAU is performed by the functional modules (AU and RU).
The following figure shows the logical structure of an AAU.
AAU3920
5

Figure 2-4 Logical structure of an AAU
The following table describes the functions of an AU and an RU.
Functional
Module
Description
AU An AU uses two groups of high-frequency antennas, which are shared by the
active and passive modules through a combiner. An AU performs the
following functions:
l Provides AU arrays, RF combination, feed power, phase shift network,
and drive system.
l Provides built-in remote control units (RCUs) that can control circuits.
l Provides the power supply channel and communication ports between an
AU and an RU.
l Provides ports for AAU mounting kits.
l Provides ports for connecting to passive RF modules operating in 2.6
GHz.
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Functional
Module
Description
RU An RU uses the wideband technology and supports ultra wideband of 1800
MHz and 2100 MHz. It can be configured with only the 1800 MHz frequency
band, only the 2100 MHz frequency band, or both the 1800 MHz and 2100
MHz frequency bands. An RU performs the following functions:
l Receives downlink baseband data from the BBU and sends uplink
baseband data to the BBU.
l On the RX channel, down-converts RF signals into IF signals, amplifies
them, and performs analog-to-digital conversion (ADC). On the TX
channel, filters out downlink signals, performs digital-to-analog
conversion (DAC), up-converts RF signals to the TX band, combines
wideband signals of the 1.8 GHz and 2.1 GHz frequency bands, and
performs dead peer detection (DPD).
l Multiplexes receive signals and transmits signals on the RF channel.
l Provides CPRI ports for CPRI convergence and distribution and a -48 V
DC port.
l Protects and filters out RF signals.
2.3 Configurations of an AAU
This section describes the configuration of an AAU.
The following figure shows the slot in an AAU.
AAU3920
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Figure 2-5 Slot in an AAU
Slot 1: RU
Configuration of Active Modules for an AAU
The following table lists the configuration of active modules for an AAU.
Table 2-1 Configuration of active modules for an AAU
Configured
Module
Model Maximum
Quantity
Optional/
Mandatory
Configuration
Description
RU RUa3920 1 Mandatory The RU can
work in GUL,
GL, UL, LTE
FDD, or UMTS
mode.
AAU3920
8

Configuration of Passive Modules for an AAU
Active and passive modules share the electrical tilt. When each active module is configured with
only one frequency band and each passive module is configured with two TX channels and two
or four RX channels, TX channels of active modules and passive modules need to be configured
on different antenna arrays.
The following figure shows the passive configurations of an AAU.
Figure 2-6 Configurations of passive modules for an AAU
l 1.8A+2.6P(2T2R/2T4R): TX/RX ports on an RFU or RRU are connected to the 2500-2690
(yL)(+) and 2500-2690(yL)(-) ports and RX ports on the RFU or RRU are connected to the
2500-2690(yyR)(+) and 2500-2690(yyR)(-) ports at the bottom of the AAU.
l 1.8A+2.6P(2T2R/2T4R): TX/RX ports on an RFU or RRU are connected to the 2500-2690
(yyR)(+) and 2500-2690(yyR)(-) ports and RX ports on the RFU or RRU are connected to
the 2500-2690(yL)(+) and 2500-2690(yL)(-) ports at the bottom of the AAU.
l 1.8A/2.1A/(1.8+2.1)A+2.6P(4T4R): Cables are connected according to principles in the
configuration of 4T4R.
2.4 Ports and Indicators on an AAU
This section describes ports and indicators on an AAU.
The following figure shows ports and indicators on an AAU.
AAU3920
9

Figure 2-7 Ports and indicators on an AAU
(1) Ports on an RU (2) Ports on an AU (3) Indicators on an RU
Ports
The following table describes the ports on an AAU.
Item Silkscreen Description
Ports on an RU PWR -48 V DC power supply port
RX TX CPRI0 Optical/electrical port 0
RX TX CPRI1 Optical/electrical port 1
Ports on an AU 2500-2690(yL)(-) RF ports connected to the
ANT ports on an external RF
module operating in 2.6 GHz
2500-2690(yL)(+)
2500-2690(yyR)(-)
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Item Silkscreen Description
2500-2690(yyR)(+)
AISG IN RET antenna port connected
to the RET port on an external
RF module
AISG OUT RET antenna cascading port
connected to the RET
antenna port on an external
RET antenna so that
downtilts of cascaded
antennas can be adjusted
Indicators
The following table describes the indicators on an AAU.
Item Indicator Color Status Description
Indicators on an
RU
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.
Blinking (on for
1s and off for 1s)
The module is
functioning
properly.
Blinking (on for
0.125s and off
for 0.125s)
Software is
being loaded to
the module, or
the module is
not started.
ALM Red Steady on Alarms are
generated, and
the module must
be replaced.
Steady off No alarm is
generated.
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11

Blinking (on for
1s and off for 1s)
An alarm is
generated, and
the alarm may
be caused by a
fault on an
associated
module or port.
Therefore, you
need to locate
the fault before
determining
whether to
replace the
module.
ACT Green Steady on The module is
functioning
properly with
TX channels
enabled.
Blinking (on for
1s and off for 1s)
The module is
functioning
properly with
TX channels
disabled.
CPRI0 Red or green Steady green The CPRI link is
functioning
properly.
Steady red An optical
module fails to
receive or
transmit signals
because the
optical module
is faulty or the
fiber optic cable
is broken.
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12

Blinking red (on
for 1s and off for
1s)
The CPRI link is
out of lock
because clocks
of two radio
systems are not
synchronized or
the data rate
negotiation over
CPRI ports fails.
You are advised
to check the
system
configuration to
locate the cause.
Steady off The small form-
factor pluggable
(SFP) module is
not properly
installed, or the
optical module
is powered off.
CPRI1 Red or green Steady green The CPRI link is
functioning
properly.
Steady red An optical
module fails to
receive or
transmit signals
because the
optical module
is faulty or the
fiber optic cable
is broken.
AAU3920
13

Blinking red (on
for 1s and off for
1s)
The CPRI link is
out of lock
because clocks
of two radio
systems are not
synchronized or
the data rate
negotiation over
CPRI ports fails.
You are advised
to check the
system
configuration to
locate the cause.
Steady off The SFP module
is not properly
installed, or the
optical module
is powered off.
2.5 RET System of an AAU
The remote electrical tilt (RET) system of an AAU consists of the remote control unit (RCU),
motor, gearing, and phase shifter. In the RET system, the RCU is used to remotely adjust the
downtilts of AU beams.
RET Function
The RCU in the RET system of an AAU receives control signals from the base station and drives
the gearing in the AU through the step motor to drive the phase shifter in the AU, thereby
adjusting the downtilt of the AU.
The following figure shows the working principle of the RET system of an AAU.
Figure 2-8 Working principle of the RET system of an AAU
AAU3920
14

RET Configuration Principles
The RET configuration principles are as follows:
l The serial numbers of logical RCUs, which do not have links, can be scanned by any RET
ports.
l Links have no priority, and apply the first-come first-served principle. Only one AISG link
can be established for an RCU serial number. If a link needs to be switched, you must delete
the configuration on the link so that the link can be released.
l After the RCU link is established, the RCU serial number is not displayed in the scanning
result of other RET ports.
The following table lists the RET configurations of active modules for an AAU.
Table 2-2 RET configurations of active modules for an AAU
Scenario Frequency Band RCU L RCU R
2T4R/2T2R 1.8A 2T2R 2R
2.1A 2R 2T2R
2T2R/4R+2T2R/4R 1.8A 2T2R -
2.1A - 2T2R
The following table lists the RET configurations of passive modules for an AAU.
Table 2-3 RET configurations of passive modules for an AAU
Scenario Frequency Band RCU L RCU R
2T2R/2T4R/4T4R 1.8A 1.8A (2T2R) 2.6P (2T2R)
2T2R/2T4R/4T4R 2.1A 2.6P (2T2R) 2.1A (2T2R)
RCU Serial Numbers
An AAU has two RCU serial numbers, which are printed on the AU label and uniquely identify
the RCU.
An RCU serial number has 19 characters and its encoding scheme is as follows: Company code
(2 digits) + Device type (7 digits) + Reserved field (2 digits) + Year (1 digit) + Month (1 digit)
+ Sequence number (4 digits) + DIN position (1 digit) + array position (1 digit).
The following table describes the meaning of each field in an RCU serial number.
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15

Table 2-4 Meaning of each field in an RCU serial number
Digit Number (from Left
to Right)
Field Meaning Field Description
1 to 2 Company code Always set to HW
3 to 9 Device type Always set to AAU3920
10 to 11 Reserved field Generated randomly
12 Year in which the product is
produced
One character is used to
represent the last two digits
of a year.
l For example, characters 1
to 9 are used to represent
the last two digits of the
years 2001 to 2009,
respectively.
l The 26 letters from A to Z
are used to represent the
years starting from 2010.
The letter A represents
2010 and the subsequent
letters represent the years
following 2010.
13 Month in which the product
is produced
For example, characters 1 to
9 represent January to
September, respectively. A
represents October, B
represents November, and C
represents December.
14 to 17 Sequence number It is generated in the
production process.
18 DIN position It represents the position of
RF ports which are counted
from the bottom of an AU. 0
represents the bottom of the
AU. The digits 1 and 3 are
reserved.
19 Array position 0 represents the low-
frequency (790 MHz to 960
MHz) array and 1 represents
the high-frequency (1710
MHz to 2690 MHz) array.
AAU3920
16

2.6 Engineering Specifications of an AAU
This section describes engineering specifications of an AAU, including input power and
equipment specifications.
Input Power Specifications
The following table lists input power specifications of an AAU.
Table 2-5 Input power specifications of an AAU
Input Power Voltage Range
-48 V DC -36 V DC to -57 V DC
Equipment Specifications
The following table lists the equipment specifications of an AAU.
Table 2-6 Equipment specifications of an AAU
Item Specifications
Dimensions (H x
W x D)
AAU: 1450 mm x 320 mm x 188 mm (57.09 in. x 12.60 in. x 7.40 in.)
(excluding the attachment plate)
Weight l Main module: 35 kg (77.18 lb)
l Handles and decorating plates: 3 kg (6.62 lb)
l Mounting kits: 6.7 kg (14.77 lb)
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17

3Optical Modules
An optical module transmits optical signals between an optical port and a fiber optic cable.
NOTE
l The exteriors of an optical module and the label on an optical module in this section are for reference
only. The actual exteriors may be different.
l Boards or RF modules supporting only the 1.25 Gbit/s CPRI port rate, for example, the GTMU or
RRU3908 V1, cannot use optical modules supporting a 9.8 Gbit/s CPRI port rate.
Exterior
The following figure shows the exterior of an optical module.
Figure 3-1 Exterior of an optical module
Label on an Optical Module
There is a label on each optical module, which provides information such as the rate, wavelength,
and transmission mode, as shown in the following figure.
AAU3920
Hardware Description 3 Optical Modules
18

Figure 3-2 Label on an optical module
(1) Rate (2) Wavelength (3) Transmission mode
Optical Module Type
Optical modules can be divided into single- and multimode optical modules, which can be
distinguished as follows:
l The puller of a single-mode optical module is blue and the puller of a multimode optical
module is black or gray.
l The transmission mode is displayed as "SM" on the label of a single-mode optical module
and "MM" on the label of a multimode optical module.
AAU3920
Hardware Description 3 Optical Modules
19

4AAU Cables
About This Chapter
This chapter describes AAU cables.
4.1 AAU Cable List
This section describes the connector types and installation positions of AAU cables, providing
reference for cable installation and replacement.
4.2 AAU PGND Cable
An AAU PGND cable connects an AAU and an external ground bar for proper grounding of the
AAU. The maximum length of an AAU PGND cable is 8 m (26.25 ft).
4.3 AAU Power Cable
An AAU power cable feeds external -48 V DC power into an AAU. The maximum length of an
AAU power cable between the AAU and its power supply is 100 m (328.08 ft).
4.4 CPRI Fiber Optic Cable
CPRI fiber optic cables are classified into multimode fiber optic cables and single-mode fiber
optic cables. They transmit CPRI signals.
4.5 Feeder
A feeder connects an RRU and an AAU and transmits signals between the base station and the
antenna system.
4.6 AISG Multi-Wire Cable
An AISG multi-wire cable connects an RRU and an AAU to transmit control signals from a base
station to an RET antenna. When the RRU is connected to the RET antenna, an AISG multi-
wire cable transmits RS485 signals. The length of an AISG multi-wire cable is 5 m (16.40 ft).
4.7 AISG Extension Cable
When the distance between an RRU and an AAU is longer than 5 m (16.4 ft), an AISG multi-
wire cable is not long enough to connect the RRU and the AAU. In this case, an AISG extension
cable is used to extend the AISG multi-wire cable. An AISG extension cable is 15 m (49.21 ft).
AAU3920
Hardware Description 4 AAU Cables
20

4.1 AAU Cable List
This section describes the connector types and installation positions of AAU cables, providing
reference for cable installation and replacement.
The following table lists AAU cables.
Table 4-1 AAU cables list
Cable One End The Other End
Connector Installation
Position
Position
AAU PGND
Cable
OT terminal
(M6, 16 mm2 or
0.025 in.2)
Primary ground
terminal on the
AAU
OT terminal
(M8, 16 mm2 or
0.025 in.2)
External ground
bar
AAU Power
Cable
EPC5
connector
INPUT port on
the AAU
Depending on
the power
equipment
External power
equipment
CPRI Fiber
Optic Cable
DLC connector l CPRI0 port
on the AAU
l CPRI1 port
on the AAU
DLC connector l CPRI port on
the BBU
l CPRI0 port
on the
cascaded
AAU
RF Jumper DIN male
connector
2500-2690(yL)
(+) or
2500-2690(yL)
(-) port on the
AAU;
2500-2690
(yyR)(+) or
2500-2690
(yyR)(-) on the
AAU
DIN male
connector
RF port on the
RRU or RFU
AISG Multi-
Wire Cable
DB9
waterproof
male connector
RET port on the
RRU
Standard AISG
female
connector
AISG IN port on
the AAU or
standard AISG
male connector
on the AISG
extension cable
AAU3920
21

Cable One End The Other End
Position
Position
AISG Extension
Cable
Standard AISG
male connector
Standard AISG
female
connector on
the AISG multi-
wire cable
Standard AISG
female
connector
AISG IN port on
the AAU
4.2 AAU PGND Cable
An AAU PGND cable connects an AAU and an external ground bar for proper grounding of the
AAU. The maximum length of an AAU PGND cable is 8 m (26.25 ft).
A PGND cable is a green or green and yellow cable. An OT terminal is installed at each end of
the cable. The following figure shows the exterior of a PGND cable.
Figure 4-1 Exterior of a PGND cable
(1) OT terminal (M6, 16 mm2 or 0.025 in.2) (2) OT terminal (M8, 16 mm2 or 0.025 in.2)
NOTE
l If the customer prepares the PGND cable, a copper-core cable with a cross-sectional area of 16 mm2
(0.025 in.2) or greater is recommended.
l One OT terminal must be added to each end of the PGND cable onsite.
l You can determine the color of the cable and whether to use corresponding two-hole OT terminals
based on local regulations.
The following figure shows a two-hole OT terminal.
Figure 4-2 Two-hole OT terminal
AAU3920
22

4.3 AAU Power Cable
An AAU power cable feeds external -48 V DC power into an AAU. The maximum length of an
AAU power cable between the AAU and its power supply is 100 m (328.08 ft).
NOTE
If the power equipment is provided by customers, the 20 A circuit breakers are recommended.
Exterior
The following figure shows the exterior of an AAU power cable. The connector at one end of
an AAU power cable is an EPC5 connector and the connector at the other end depends on the
power equipment.
Figure 4-3 AAU power cable
(1) EPC5 connector
Description
The following table describes an AAU power cable.
Table 4-2 Specifications of an AAU power cable
Cable Wire Color of the
Wire (North
American
Standard)
Color of the
Wire
(European
Standard)
Cross-
Sectional
Area of the
Wire
AAU power
cable
RTN(+) Black Brown l European
standard: 6
mm2 (0.009
in.2), and 8
mm2 (0.012
in.2)
l North
American
standard: 5.3
mm2 (0.008
in.2) (10
AAU3920
23

Cable Wire Color of the
Wire (North
American
Standard)
Color of the
Wire
(European
Standard)
Cross-
Sectional
Area of the
Wire
NEG(-) Blue Blue AWG) and
8.2 mm2
(0.013 in.2)
(8 AWG)
4.4 CPRI Fiber Optic Cable
CPRI fiber optic cables are classified into multimode fiber optic cables and single-mode fiber
optic cables. They transmit CPRI signals.
A multimode fiber optic cable connecting a BBU and an AAU is 150 m (492.13 ft) long at most.
A multimode fiber optic cable connecting two AAUs is 100 m (328.08 ft) long at most.
A single-mode fiber optic cable consists of a single-mode pigtail and a trunk single-mode fiber
optic cable, which are connected through an optical distribution frame (ODF). A single-mode
pigtail is 20 m (65.62 ft) and 70 m (229.66 ft) long at most on the BBU and AAU sides,
respectively.
When the distance between two AAUs is longer than or equal to 100 m (328. 08 ft), a single-
mode fiber optic cable is used.
NOTE
l The ODF and trunk single-mode fiber optic cable are provided by the customer and must comply with
the ITU-T G.652 standard.
l The ODF is an outdoor transfer box for fiber optic cables, which interconnects the single-mode pigtail
and trunk single-mode fiber optic cable.
l A multimode fiber optic cable and a single-mode fiber optic cable are connected to a multimode optical
module and a single-mode optical module, respectively.
Exterior
Multimode fiber optic cable: The multimode fiber optic cable has a DLC connector at each
end, as shown in the following figure.
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Figure 4-4 Multimode fiber optic cable
(1) DLC connector (2) Breakout cable (3) Label on the breakout cable
NOTE
l When a multimode fiber optic cable connects a BBU and an AAU, the breakout cable on the BBU side
is 0.34 m (13.39 in.) and the breakout cable on the AAU side is 0.03 m (1.18 in.).
l When a multimode fiber optic cable connects two AAUs, the breakout cable on both sides is 0.03 m
(1.18 in.).
The following figure shows the connection of a multimode fiber optic cable between a BBU and
an AAU.
Figure 4-5 Connection of a multimode fiber optic cable between a BBU and an AAU
(1) Multimode fiber optic cable between a BBU and an AAU
Single-mode pigtail: The single-mode pigtail has a DLC connector at one end and an FC, LC,
or SC connector at the other end, as shown in the following figure.
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Figure 4-6 Single-mode pigtail
(1) DLC connector (2) Breakout
cable
(3) Label on the
breakout cable
(4) FC connector (5) LC connector (6) SC connector
NOTE
l When a single-mode pigtail connects a BBU and an ODM, the breakout cables on the BBU and ODM
sides are 0.34 m (13.39 in.) and 0.8 m (31.50 in.), respectively.
l When a single-mode pigtail connects an ODM and an AAU, the breakout cables on the AAU and ODM
sides are 0.03 m (1.18 in.) and 0.8 m (31.50 in.), respectively.
The following figure shows the connection of a single-mode pigtail.
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Figure 4-7 Connection of a single-mode pigtail
(1) Single-mode pigtail between a BBU and an ODF (2) Single-mode pigtail between an ODF and an AAU
(3) Single-mode pigtail between an ODM and an AAU -
Selection Principle
The following table describes the principles for selecting CPRI fiber optic cables.
Table 4-3 Principles for selecting CPRI fiber optic cables
Remote
Distance
Selection Principle Remarks
Shorter than or
equal to 100 m
(328. 08 ft)
Multimode fiber optic cable Connects a BBU and an AAU
When it connects two AAUs, the distance
between the two AAUs must be shorter than
or equal to 100 m (328. 08 ft).
Longer than
100 m (328.08
ft) and shorter
than or equal
to 150 m
(492.12 ft)
Multimode fiber optic cable Connects a BBU and an AAU
Recommended: single-mode
fiber optic cable (single-mode
pigtail and trunk single-mode
fiber optic cable)
The single-mode pigtail on the BBU or
AAU side is connected to the trunk single-
mode fiber optic cable using an ODM.
Longer than
150 m (492.12
ft)
Single-mode fiber optic cable
(single-mode pigtail and trunk
single-mode fiber optic cable)
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Pin Assignment
The following table describes the labels on and recommended connections for the breakout
cables of a CPRI fiber optic cable.
Table 4-4 Labels on and recommended connections for the breakout cables of a CPRI fiber optic
cable
Label Installation Position
Multimode Fiber
Optic Cable
Between a BBU or
an ODF and an
AAU
Multimode Fiber
Optic Cable
Between Two
AAUs
Single-Mode Pigtail
(Interconnected by
an ODM)
1A CPRI RX port on the
AAU
CPRI RX port on
AAU 1
RX port on the BBU or
CPRI RX port on the
AAU
1B CPRI TX port on the
AAU
CPRI TX port on
AAU 1
TX port on the BBU or
CPRI TX port on the
AAU
2A ODM or TX port on
the BBU
CPRI TX port on
AAU 0
ODM
2B ODM or RX port on
the BBU
CPRI RX port on
AAU 0
ODM
4.5 Feeder
A feeder connects an RRU and an AAU and transmits signals between the base station and the
antenna system.
Exterior
Figure 4-8 shows a feeder with a DIN male connector at each end.
Figure 4-8 Exterior of a feeder
(1) DIN male connector
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4.6 AISG Multi-Wire Cable
An AISG multi-wire cable connects an RRU and an AAU to transmit control signals from a base
station to an RET antenna. When the RRU is connected to the RET antenna, an AISG multi-
wire cable transmits RS485 signals. The length of an AISG multi-wire cable is 5 m (16.40 ft).
NOTE
l An AAU contains built-in remote control units (RCUs).
l An RCU is a driving motor used for the phase shifter in the RET antenna. It receives control commands
from a base station and runs commands to drive the stepper motor. Using a gear, the stepper motor
drives the adjustable phase shifter in the antenna to change the downtilt of the antenna.
Exterior
The following figure shows the exterior of an AISG multi-wire cable.
Figure 4-9 Exterior of an AISG Multi-wire cable
(1) Waterproof DB9 male connector (2) Standard AISG female connector
Description
The following table describes an AISG multi-wire cable.
Table 4-5 Description of an AISG multi-wire cable
X1 End (Pin of the
Waterproof DB9
Male Connector)
X2 End (Pin of the
Standard AISG
Female Connector)
Color Wire Description
X1.1 X2.1
White and
blue Twisted
pair
+12 V
Blue
X1.3 X2.3 White and
orange Twisted
pair
RS485 B
X1.5 X2.5 Orange RS485 A
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X1 End (Pin of the
Waterproof DB9
Male Connector)
X2 End (Pin of the
Standard AISG
Female Connector)
X1.4 X2.4 White and
green
- GND
X1.9 and X1.4 are
interconnected.
- - - GND
- X2.1 and X2.6 are
interconnected.
- - +12 V
- X2.4 and X2.7 are
interconnected.
- - GND
4.7 AISG Extension Cable
When the distance between an RRU and an AAU is longer than 5 m (16.4 ft), an AISG multi-
wire cable is not long enough to connect the RRU and the AAU. In this case, an AISG extension
cable is used to extend the AISG multi-wire cable. An AISG extension cable is 15 m (49.21 ft).
Exterior
The following figure shows the exterior of an AISG extension cable.
Figure 4-10 Exterior of AISG extension cable
(1) Standard AISG male connector (2) Standard AISG female connector
Description
The following table describes an AISG extension cable.
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Table 4-6 Description of an AISG Extension cable
X1 End (Pin
of the
Standard
AISG Male
Connector)
X2 End (Pin
of the
Standard
AISG
Female
Connector)
X1.1 X2.1 White and blue Twisted pair +12 V
Blue
X1.7 X2.7 White and orange Twisted pair DC Return A
Orange
X1.3 X2.3 White and green Twisted pair RS485 B
X1.5 X2.5 Green RS485 A
X1.6 X2.6 White and brown Twisted pair +24 V
Brown
AAU3920
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