OptiX RTN 950 Radio Transmission System V100R002

IDU Quick Installation Guide

OptiX RTN 950 V100R002

IDU

Issue: 04 Date:2010-04-20 04 2010-04-20

HUAWEI TECHNOLOGIES CO., LTD.

Huawei Technologies Co., Ltd. provides customers with comprehensive technical support and service. For any assistance, please contact our local office or company headquarters.

Huawei Technologies Co., Ltd.

Address: Huawei Industrial Base Bantian, Longgang Shenzhen 518129 People's Republic of China Website: Email: http://www.huawei.com support@huawei.com

Copyright Huawei Technologies Co., Ltd. 2010. All rights reserved.

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Notice
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 the warranty of any kind, express or implied.

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Contents
Precautions Tools for Installation Introduction to the IDU IDU 1 5 6 6 6 7 7 8 8 8 9 10 13 13 13 14 14 15 15

1 2 1 2 1 2 3 4 1 2 3

Introduction to Interfaces Introduction to Installation Holes on Both Sides of the Chassis

Flow
Installing Flow Commissioning Flow

Installing the IDU IDU

Installing the Chassis in the 19-Inch Cabinet 19 Installing the Chassis in the ETSI Cabinet ETSI Installing the Chassis on the Wall Installing the Chassis on the Desk

Optional: Installing the E1 Panel E1 Panel

Fixing the Floating Nuts Fixing the E1 Panel E1 panel Installing the PGND Cable on the E1 Panel E1 panel

Installing the Board Installing the IDU Cables IDU

Contents
1 Installing the PGND Cable 2 Installing the Power Cable 3 Installing the E1 Cable E1 4 Installing the Ethernet Service Network Cable 5 Installing the XPIC cable XPIC 6 Installing the IF Jumper Installing the Fiber Jumper 7 8 Installing the NM Cable 9 Installing the Orderwire Phone Line 10 Installing the External Clock Cable 11 Installing the Asynchronous and Synchronous Date Cable 12 Installing the External Alarm Cable

15 16 17 18 18 19 20 20 21 22 23 24 25 26 27 27 28 29 30

Powering On the Equipment Configuring the NE Data (by Using the U2000 LCT) (U2000 LCT) Aligning the Antennas

1 2

Aligning the Single-Polarized Antennas Aligning the Dual-Polarized Antennas

Checking the Status of a Radio Link Checking the Installation

Precautions

This document aims to provide simple and distinctive guidelines for hardware installation. This document does not describe operations for the pre-delivery installation. Instead, this document describers only the operations for on-site installation.

Electrostatic Discharge Before touching the device, or holding the boards and IC chips, wear the anti-static gloves or anti-static wrist strap to prevent the electrostatic discharge of the human body from damaging the sensitive components. Ensure that the other end of the anti-static wrist strap is well grounded. IC

Bundling Cables The distance between cable ties or fiber binding straps inside the cabinet should be within 250 mm. (For subscriber cable, the distance is 200 mm. ) /250mm 200mm The distance between cable ties for all cables and corrugated pipes outside the cabinet is determined according to the distance between two horizontal beams. For the cabling trough without beams, bundle the cables with the distance not exceeding 250 mm between cable ties. 250mm

Checking Before Installation Before starting installation, you should make the equipment room, power supply, ground wire, optical cables, and other facilities in the equipment ready. When these installation conditions are confirmed, the installation may begin according to the pre-designed layouts.For detailed requirements and related index, refer to Installation Reference.

Precautions for Handling the Toggle Lever Switch

Location and positions of the toggle lever switch

O : OFF

Before turning the toggle lever switch, you must pull it out slightly. I : ON

Turning on the switch

1 2 3

1 Pull the switch out slightly.

2 Turn the switch.

Release the switch.

Turning off the switch

1 2 3

1 Pull the switch out slightly.

2 Turn the switch.

Release the switch.

Precautions for Handling the IF Jumper

Before removing or inserting the IF jumper, you must power off the ODU. ODU

Do not remove or insert the IF jumper when the ODU is powered on. ODU

Power off the ODU. ODU

Connect or disconnect the IF jumper.

Precautions for Handling the IF Cable

Before removing or inserting the IF cable, you must power off the ODU. ODU

Do not remove or insert the IF cable when the ODU is powered on. ODU

Power off the ODU. ODU

Connect or disconnect the IF cable.

Precautions for Handling the IF Board

Before removing or inserting the IF board, you must power off the ODU. ODU

Remove the IF board.

Insert the IF board.

Power off the ODU. ODU

Disconnect the IF Jumper.

Remove or insert the IF board.

Do not remove or insert the IF board when the ODU is powered on. ODU

Tools for installation

Tape Measure

Level Bar

Philips Screwdriver

Flathead Screwdriver

Adjustable Wrench

Socket Wrench

Torque Wrench

Allen Wrench

Ratchet Crimp Tool

Cable Cutter

Wire Stripper

Network Cable Crimping Pliers

Diagonal Pliers

Crimping Tool

Sharp-nose Pliers

Bayonet Wrench

Pliers

File

Multimeter

Heat Gun

Percussion Drill

Marker Pen

Paper Knife

Claw Hammer

Antistatic Gloves

Antistatic Gloves

Antistatic Wrist Strap

Ladder

Electric Iron

Punching Wire Pliers

Cleaner

Binding Strap

Insulation Tape

Introduction to the IDU IDU

Introduction to Interfaces

10
Input power interface

11
ODU power switch ODU Optical interface

12

External clock/time interface / Ethernet service interface IF interface

10
11
12

Orderwire phone interface External alarm interface E1 interface E1

NM/COM interface
/COM NE cascading interface

Synchronous/Asynchronous data interface /

According to different board configurations, the positions of the actual IDU interfaces may be different from the positions shown in the figures. IDU

Introduction to Installation Holes on Both Sides of the Chassis

Installation holes in the T63/T66/N66T cabinet T63/T66/N66T

Installation holes in the N63E/19-inch cabinet N63E/19 Before installing the chassis in the ETSI cabinet, adjust the installation holes of the mounting ears according to the type of the cabinet. ETSI

Flow
Installation Flow
Start

Page15 15

Installing the PGND Cable

Page 8 to 13 8-13

Installing the IDU IDU

Page 8 8

Installing the Chassis in the 19Inch Cabinet 19

Page 16 16

Installing the Power Cable Page 13 to 14 13-14 Optional: Installing the E1 Panel E1 Panel

Page 9 9

Installing the Chassis in the ETSI Cabinet ETSI

Page 17 17

Installing the E1 Cable E1

Page 10 10

Installing the Chassis on the Wall

Page 18 18

Installing the Ethernet Service Network Cable

Page 15 15

Installing the Board

Page 13 13

Installing the Chassis on the Desk

Page 18 18

Installing the XPIC Cable XPIC

Page 19 19

Installing the IF Jumper

Page 15 to 24 15-24

Installing the IDU Cables IDU

Page 20 20

Installing the Fiber Jumper

Page 20 20

Installing the NM Cable Page 30 30 Checking the Installation

Page 21 21

Installing the Orderwire Phone Line

Page 22 22

Installing the External Clock Cable

End

Page 23 23

Installing the Asynchronous and Synchronous Data Cable

Page 24 24

Installing the External Alarm Cable

Commissioning Flow
Start

Page 25 25

Powering On the Equipment

Page 26 26

Optional: Configuring the NE Data (by Using the Web LCT) (Web LCT) Aligning the Single-Polarized Antennas

Page 27 to 28 27-28

Page 27 27 Aligning the Antennas Page 28 28

Aligning the Dual-Polarized Antennas

Page 29 29

Checking the Status of a Radio Link

End

1
a

Installing IDU IDU

Installing the Chassis in the 19-Inch Cabinet 19
Fixing the floating nuts

Removing the screws

floating nut installation hole

When tightening the floating nuts, ensure that that a minimum of 25 mm space on the left and right sides of the IDU is reserved for ventilation. IDUIDU 25mm

Keep the removed screws properly for installing the PGND cable in future.

Installing the chassis in the cabinet

Installing the PGND cable

To the grounding point on the rack column of the cabinet or the indoor grounding bar.

M6

2.00.2 NM

M4

1.40.14 NM

Install the conducting wire support if provided.

Installing the PGND cable by using the removed screws

2
a

Installing the Chassis in the ETSI Cabinet ETSI

Fixing the floating nuts

Installing the mounting ears

Before installing the chassis in an ETSI cabinet, adjust the installation holes of the mounting ears according to the cabinet type. installation hole ETSI M6 screw assembly M6

floating nut When tightening the floating nuts, ensure that that a minimum of 25 mm space on the left and right sides of the IDU is reserved for ventilation. IDUIDU 25mm

M6

Mounting ears

3.00.3 NM

Installing the PGND cable

To the grounding point on the rack column of the cabinet or the indoor grounding bar.

Installing the chassis in the cabinet

M6

2.00.2 NM

M4

1.40.14 NM

Installing the PGND cable by using the removed screws

Install the conducting wire support if provided.

3
a

Installing the Chassis on the Wall

Removing the mounting ears

Positioning and drilling the holes (1) 1

Position the mounting ear on the wall, drill the holes, and install the bolts. After the installation, ensure that a minimum of 50 mm space on the upper and lower sides of the IDU is reserved for ventilation. IDUIDU50mm
300mm

10

Installing the mounting ears

Installing the conducting wire support (optional)

Rotate the mounting ears to 90 degrees. Install the mounting ears in the direction as shown in the figure. 900

If the conducting wire frame is provided, install it according to the illustration in the figure. Otherwise, go to Step g. g

Installing the conducting wire support (optional)

Expected Installation Effect

11

Positioning and drilling the holes (2) 2

Mount the equipment onto the bolts installed on the wall. Then, use the marker pen to mark the positions of the mounting ears. Remove the equipment and drill the holes at the marked positions. 8 holes with a depth of 52 mm to 60 mm 8 52mm 60mm

Marking the hole locations

When installing the chassis on the wall, place the fan assembly in the lower part of the chassis for heat dissipation.

Installing the chassis on the wall

Installing the PGND cable

Big flat washer

M4

Nut

Small flat washer

Fan assembly

M6x60 expansion bolt

1.40.14 NM

M660

PGND cable

12

4
a

Installing the Chassis on the Desk

Installing the plastic foot

Installing the PGND cable

Removing the mounting ears and Installing the plastic foot

Installing the PGND cable by using the removed screws PGND cable

M4

1.40.14 NM

Plastic foot

Do not place any object near the ventilation holes on the two sides of the cabinet. Otherwise, heat dissipation is affected.

Optional: Installing the E1 Panel E1 Panel

Fixing the Floating Nuts

Floating nut Installation hole

13

Fixing the E1 Panel E1 panel

Installing the PGND Cable on the E1 Panel E1 panel

To the grounding point on the rack column of the cabinet or the indoor grounding bar.

14

Installing the Board

1
2 3 4

Guide rail Loosen the screws on the filler panel and remove the filler panel. Hold the ejector levers on the panel with hands and push them outwards so that the angle between the ejector lever and the panel is approximately 45 degrees. Push the board gently along the guide rail until the board cannot slide further. 45 Apply proper force to clip the two ejector levers of the board. Tighten the screws on the panel. When installing, inserting, or removing the board, wear an antistatic wrist strap or antistatic gloves. Before you insert a board, ensure that the slot is correct. If it is difficult to insert the board, stop the operation.

Installing the IDU Cables

IDU
Installing the PGND Cable

If the PGND cable is installed in the ETSI cabinet, connect the PGND cable to the grounding point that is on the left side of the chassis. ETSI

If the PGND cable is installed in the 19-inch cabinet, connect the PGND cable to the grounding point of the left mounting ear of the chassis.

19

15

Installing the Power Cable

BGND power cable BGND

M2 48 V power cable 48V

0.5-0.6 NM

1 Make a proper terminal for the power cable end according to power cable processing specifications. Then, insert the power cable into the DC connector according to the wiring sequence.

2 Loosen the screws on the DC connector, insert the conductive part of the bare crimp terminal of the power cable into the DC connector, and then tighten the screws.

When making the terminal, press the connector firmly and equip it with a heat shrinkable tube to prevent the bare core and the handle of the connector from being exposed.

Check the fuse current of the external power supply Recommended current value of the external fuse
20 A

Check the voltage and polarity of the external power supply. Standard voltage of the input power 48 V 60 V Allowable voltage range 38.4 V to 57.6 V 48 V to 72 V

RTN(+)

NEG(-)

3 2 OUTPUT

A
RTN1(+) RTN2(+) NEG1(-) NEG2(-)

B
ON OFF
32A

3 2 OUTPUT

ON OFF
32A 32A 20A 20A

INPUT

32A

20A

20A

16

Ensure that the air switch of the PDU is set to the OFF state. Insert the DC connector into the power interface of the chassis. Ensure that the two groups of power cables are connected to different wiring terminals, and then tighten the screws of the power connector and the chassis. PDUOFF

The PIU boards are of 1+1 hot backup. PIU1+1

3
a

Installing the E1 Cable E1

Optional:Connecting the E1 cable to the external equipment

Optional: Connecting the E1 cable to the E1 panel E1 panel

The SP3D and SP3S boards provide the E1 interface. SP3DSP3SE1

M2.5

SP3D

0.40.03 NM

For information about the wiring sequence of the E1 cables, see the wiring table attached with the E1 cables or the cable part in the Hardware Description. E1 If the diameter of an E1 cable is 1.6 mm, you need to use a type 75-1-1 connector and a 2.5 mm or 1.7 mm cable crimping tool when making the DDF-side connector of the E1 cable. E11.6mmDDF 75-1-12.5mm1.7mm

SP3D

17

Installing the Ethernet Service Network Cable

The EM6T and EM6F boards provide the FE interface. EM6TEM6FFE

EM6T The Ethernet electrical interface supports the MDI/MDI-X adaptive function. Hence, you can make either a crossover cable or a straight-through cable. It is recommended that you make a straight-through cable. MDI/MDI-X

Installing the XPIC Cable XPIC

X-OUT X-IN

X-OUT X-IN

IFX2

The IN port of one XPIC IF board must be connected to the OUT port of the other XPIC IF board. XPICINXPICOUT If the XPIC function is disabled, use a shorter XPIC cable to connect the IN port to the OUT port of the same XPIC IF board. Otherwise, the signals in the XPIC IF board degrade. XPICXPICXPICINOUT XPIC

18

6
a

Installing the IF Jumper

Installing the IF jumper
The IF1, IFU2 and IFX2 boards provide the IF interface. IF1IFU2IFX2

ODU switch ODU

The ODU switch on the IF board must be turned off when you are Installing the IF jumper. ODU If the RG-8U IF cable is used, an IF jumper is required to connect the IF cable and IDU. If the 5D IF cable is used, the 5D IF cable is connected directly to the IDU. RG-8U1/2IDU5D IDU

Connecting the IF jumper to the IF cable

IF jumper

IF cable

When connecting an IF jumper to an IF cable, you must test the connectivity of the IF cable. On the equipment configured with IF 1+1 protection, the IF cable of the main ODU must be connected to the IF jumper of the main IF board, and the IF cable of the standby ODU must be connected to the IF jumper of the standby IF board. 1+1ODUODU If the IF boards that provide the XPIC function are used, the IF cable of the ODU that operates the vertical polarization must be connected to the IF jumper of the IF board that processes vertically polarized waves, and the IF cable of the ODU that operates the horizontal polarization must be connected to the IF jumper of the IF board that processes horizontally polarized waves. XPICODU ODUXPIC

19

Installing the Fiber Jumper

The SL1D and EM6F boards provide the optical interface. SL1DEM6F

Laser
When handling optical fibers, do not stand close to or look into the optical fiber outlet without eye protection.

SL1D When routed outside a cabinet, the fiber jumpers must be placed in a corrugated pipe or a winding pipe. The corrugated pipe should be led into the cabinet by about 10 cm inside and bound tightly. 10cm Before using a pipe, cut it to an appropriate length depending on the routing distance between the IDU and the ODF. IDUODF After leading the fiber jumpers through the corrugated pipe, wrap adhesive tapes around the cuts of the corrugated pipe. The bend radius of the fiber jumper must be greater than its minimum curvature radius. Specifically, the minimum curvature radius for the 2 mm fiber jumper is 40 mm, and that for the 3 mm fiber jumper is 60 mm. 2mm40mm3mm 60mm

8
a

Installing the NM cable

Installing the NM cable (when the NE functions as gateway NE) ()
The CSH and CST boards provide the NMS/COM interface. CSHCSTNMS/COM

NM NMS/COM

20

Installing the NM cable (when more than one NE is installed at a site) ()

NE

NMS/COM

You need make the network cable on site. Either the crossover cable or the straight-through cable can be used. Ensure that the interconnected network cables do not form a loop and the standby CSH/CSTA board is not connected to the NMS interface and the NE cascading interface.

Installing the Orderwire Phone Line

PHONE

21

10

Installing the External Clock Cable

Making the external clock/time cable according to the pin assignment /

Pin 1 2 3 6 4 5 7 8

Color White/Orange / Orange White/Green / Green Blue White/Blue / White/Brown / Brown

Relationship Twisted pair

CLK/TOD1 Negative receive end of the external clock Positive receive end of the external clock External time 1_N 1_N External time 1_P 1_P Negative transmit end of the external clock Positive transmit end of the external clock External time 2_N 2_N External time 2_P 2_P

Twisted pair

Twisted pair

Twisted pair

Installing the external clock/time cable of the IDU IDU/

TOD2

CLK/TOD1

22

11
a

Installing the Asynchronous and Synchronous Data Cable

Making the synchronous and asynchronous data cable according to the pin assignment

Signal receiving RING RING Pin 1 2 3 6 4 5 7 8 Color White/Orange / Orange White/Green / Green Blue White/Blue / White/Brown / Brown Relationship Twisted pair Function Transmits asynchronous data signals. Grounding Receives asynchronous data signals. Grounding Transmits synchronous data signals (TIP). TIP Transmits synchronous data signals (RING). RING Receives synchronous data signals (TIP). TIP Receives synchronous data signals (RING). RING

Twisted pair

Twisted pair

Twisted pair

Installing the synchronous and asynchronous data cable of the IDU IDU

F1/S1

23

12
a
Pin 1 2 3 6 4 5 7 8

Installing the External Alarm Cable

Making the external alarm cable according to the pin assignment

Color White/Orange / Orange White/Green / Green Blue White/Blue / White/Brown / Brown

Relationship Twisted pair

ALMI

ALMO

Inputs the external alarm signal of channel 1 Positive output alarm signal of channel 1 1 1 Grounding Negative output alarm signal of channel 1 1

Twisted pair

Inputs the external alarm signal of channel 2 Positive output alarm signal of channel 2 2 2 Grounding Negative output alarm signal of channel 2 2

Twisted pair

Inputs the external alarm signal of channel 3 Positive output alarm signal of channel 1 3 1 Grounding Negative output alarm signal of channel 1 1

Twisted pair

Inputs the external alarm signal of channel 4 Positive output alarm signal of channel 2 4 2 Grounding Negative output alarm signal of channel 2 2

Installing the external alarm cable of the IDU IDU

ALMO ALMI

24

Powering On the Equipment

Before powering on the equipment, ensure that the installation of the ODU is completed and the ODU switch on the IF board is set to the off state. ODUODU

Green indicator: The fan runs normally.

Red indicator: The fan is faulty.

Status Description of the Indicator Indicator

PWR

Status
Normally on in green color Off

Description
The power supply is normal. The power supply is faulty. The fan runs normally. The fan is faulty. The fan is powered off.

FAN

Normally on in green color Normally on in red color Off

Check and ensure that the STAT and SYNC indicators on the system control switch & clock board are on in green color, and the PROG indicator is off. STATSYNC PROG

25

Configuring the NE Data (by Using the Web LCT) (Web LCT)

NMS/COM

The basic data configured for the NE through the Web LCT includes basic data of the NE, IF/ODU information of the radio link, parameters for the IF interfaces, and parameters for the ODU interfaces. Web LCTIF/ODUODU

26

Aligning the Antennas

Aligning the Single-Polarized Antennas
Determine the azimuth of the antenna according to the installation position and height of the antenna. Then, adjust the elevation of the antenna to the horizontal position. Connect a multimeter to the RSSI port on the ODU at the local end and test the voltage value VBNC. ODURSSIReceived Signal Strength Indicator VBNC

The red line of the multimeter is connected to the pin, and the black line of the multimeter is connected to the inner wall (grounding pin).

Elevation adjustment screw Level adjustment screw

a b c

Maintain the remote antenna fixed. Adjust the level adjustment screw. At the local end, rotate the antenna widely in the horizontal direction. If three signal peaks are tracked, adjust the azimuth of the antenna so that the received signal level (RSL) reaches the peak value at position 2. 2 If two signal peaks are tracked, adjust the azimuth of the antenna to the middle of positions 4 and 5. Then, adjust the elevation of the antenna so that the three signal peaks such as the signals on the line AA' can appear. Adjust the antenna so that the RSL reaches the peak value at position 2. 45 AA2 If one signal peak is tracked, adjust the azimuth of the antenna to the middle of positions 6 and 7. Then, adjust the elevation of the antenna so that the three signal peaks such as the signals on the line AA' can appear. Adjust the antenna so that the RSL reaches the peak value at position 2. 67 AA2

27

Front view of the lines tracked at different elevations of the antenna

RSL value of each line

6 7 C 4 B 2 1 A 3 A' 5 B' C'

C B A 4 1

6 2

7 5 3

C' B' A'

Adjust the elevation adjustment screw. At the local end, slightly adjust the elevation and azimuth until the RSL reaches the peak within the tracked range. Repeat Steps 3 to 4 to ensure that three signal peaks are tracked in both horizontal and vertical directions. When the local RSL reaches the maximum peak value, tighten the local antenna. 3 Adjust the remote antenna to ensure that the RSL at the local end and the RSL at the remote end reach the peak value. Check the status of the ODU indicator on the IF board. The ODU indicator on the IF board should be off. If the ODU indicator on the IF board blinks yellow every 300 ms, you need to align the antenna. ODU ODU300ms Tighten all the screws of the antennas.

Aligning the Dual-Polarized Antennas

Power off the vertically polarized ODUs at both ends of the radio link, power on the horizontally polarized ODUs at both ends of the radio link, and thus ensure that the antennas transmit horizontally polarized signals. VODUHODU H Adjust the azimuth and elevation of the antennas at both ends by referring to the description in Aligning the Single-Polarized Antennas, and ensure that the main lobes of the horizontally polarized signals are aligned with the antennas. H

28

Use a multimeter to measure the RSL (P1) on the RSSI port of the horizontally polarized ODU at the local end. HODURSSIP1 Power on the vertically polarized ODU at the local end. Use a multimeter to measure the RSL on the RSSI port of the vertically polarized ODU. Release the holder of the feed boom slightly, and turn the feed boom gently until the RSL reaches the minimum value (P2). The calculated XPD1 (XPD1 = P1 - P2) should be not less than 30 dB. Record the angle (D1) of the current feed boom. VODUVODURSSI VP2HV XPD1XPD1=P1-P230dBD1 Power off the horizontally polarized ODUs at both ends of the radio link, and power on the vertically polarized ODUs at both ends of the radio link. Adjust the azimuth and elevation of the antennas at both ends by referring to the description in Aligning the Single-Polarized Antennas, and ensure that the main lobes of the horizontally polarized signals are aligned with the antennas. HODUVODU V Refer to Steps 3 and 4 to ensure that the calculated XPD2 (XPD2 = P3 - P4) should be not less than 30 dB. Record the angle (D2) of the current feed boom. VHXPD2XPD2=P3-P430dB, D2 Repeat Steps 1 to 6 to adjust the feed boom slightly (ranging from D1 to D2), and ensure that XPD1 and XPD2 are not less than 30 dB. D1D2 XPD1XPD230dB Tighten all the screws of the antennas.

Checking the Status of a Radio Link

LINK indicator LINK

a b

Check the status of the LINK indicator on the IF board. LINK If the LINK indicator is on and green, it indicates that the status of a radio link is normal. LINK If the LINK indicator is on and red, check whether the configuration data is correct and whether the antennas are aligned properly. If the configuration data is incorrect or if the antennas are not aligned properly, configure the correct data or align the antennas. LINK

29

Checking the Installation

No. 1 2 3 4 5 Item
The chassis should be installed firmly in the position specified in the engineering design document. Each chassis component does not have any paint drop, damage, or stain. Otherwise, re-paint or clean the component. When a board is inserted into the chassis, the screws on the front panel of the board should be tightened. Empty slots in the chassis should be covered with filler panels. The routing of the cables should conform to the engineering design document and should facilitate maintenance and expansion in the future.

6 7 8

The cables should not be damaged, broken, or jointed in between. Each core of the cables should be tested for connectivity. The cables should be bundled closely with proper force. The spacing between the cable ties should be even. After the cable ties are fixed, the remaining part should be trimmed with no burrs.

9 10

The signal cables should be routed correctly in the cabinet. The cables outside the cabinet should be routed as follows: The cables should be placed tidily and should not be cross-connected. If a cabling ladder is used, the cables should be bound onto the ladder beam tidily. If the cabling frame is 0.8 m or more higher than the cabinet top, a cabling ladder should be available on the cabinet top to support the cables and to ease stress. 0.8m The cable turns should be smooth and have a big bending radius.

11 12

The cable labels should be filled in correctly and stuck firmly. They should be aligned and face to the same direction. The labels need to be stuck two centimeters away from the connectors. 2cm The power cable and grounding cable should be routed separately from the signal cables. The unused cable connectors should be protected. For example, the connectors should be installed with protective caps.

13 14 15 16

The protective tube for the fiber jumpers should be led into the cabinet for 10 cm and bound tightly. 10cm The cuts of the protective tube for the fiber jumpers should be smooth. Otherwise, they should be wrapped by an insulating tape.

17 18

The fiber jumpers should not be bound over-tightly, and can be moved freely in the cable tie. The connecting points of the fiber jumpers should be clean. The unused fiber connectors and optical interfaces should be protected by protective caps (plugs).

30

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