OptiX RTN 600 Equipment Commissioning-20080801-A

7/28/2019 OptiX RTN 600 Equipment Commissioning-20080801-A

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Copyright 2006 Huawei Technologies Co., Ltd. All rights reserved.

OptiX RTN 600 Equipment

Commissioning


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Copyright 2006 Huawei Technologies Co., Ltd. All rights reserved. Page 1

Learning Guide

Before studying this course, you are supposed to complete the

study on

Basics of digital microwave communications or related

knowledge

OptiX RTN 600 Product Introduction

OptiX RTN 600 Networking and Protection Mechanism


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References

Digital Microwave Communications Basics

OptiX RTN 600 Radio Transmission System Configuration

Guide

OptiX RTN 600 Radio Transmission System Commissioning

Guide


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Objectives

Upon completion of this course, you will be able to:

Finish proper preparations before the commissioning

Performing NE commissioning of the OptiX RTN 600

Performing hop commissioning of the OptiX RTN 600

New introduce slide of V1R2 is remarked by

R2 New Slide

Adjust Slide


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Contents

1. Preparations for the OptiX RTN 600 Commissioning

2. NE Commissioning of the OptiX RTN 600

3. Hop Commissioning of the OptiX RTN 600


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Contents


1.1 Determining Commissioning Items

1.2 Preparing Related Documents

1.3 Preparing Related Tools

1.4 Checking Commissioning Conditions


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Determining Commissioning Items

1. NE Commissioning Items

Commissioning Item Optional/Require

d

Remarks

Powering on the

equipmentRequired

If the fan is available in the equipment,

check whether the fan is working or not

after power on.

Testing indicators RequiredCheck whether all indicators work

normally or not.

Connecting the Web

LCTRequired

-

Configuring the data Required -

Performing the service

loopback testOptional

If the instruments are available on site, it

is recommended that you test this item.


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Determining Commissioning Items (cont.)

1. NE Commissioning Items (cont.)

Commissioning Item Optional/Require

d

Remarks

Testing E1 cablesconnections

Optional It applies to the station where the E1service is accessed.

Checking the receive

and transmit power of

the optical interface

Optional

It applies to the station where the SDH

optical interface service is accessed.

Testing the RF transmitpower

Required Use the Web LCT to query the RFtransmit power.

Testing the

active/standby cross-

connect board switching

Optional

It only applies to the equipment

configured with the active and standby

cross-connect boards.


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Determining Commissioning Items (cont.)

Commissioning Item Optional/

Required

Remarks

Aligning the antenna Required -

Testing the ECC Required -

Testing the orderwire

phoneOptional

It is applicable when there is the order

wire phone available between stations.

Testing all services Required Test all service types turned up at thestation like the E1, STM-1, and WS.

Testing the clock

tracingRequire

Check and ensure that the clock source

can be traced normally.

2. Hop Commissioning Items


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New Add Commissioning Items NE Commissioning Items

R2 New Slide

Commissioning Item Optional/RequiredRemarks

Testing the XPIC Cable

connectionOptional

It is applicable when the IFX is

configured.

Commissioning ItemOptional/Requir

ed

Remarks

Testing the E3DS3services requiredIt is applicable when the E3 (DS3) service

is configured.

Testing XPIC function required It is applicable when the XPIC is configured.

Testing N+1 protection switching requiredIt is applicable when the N+1 protection is

configured.

Hop Commissioning Items


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Preparing Related Documents

The documents that are required include the engineering design

documents and commissioning guide documents.

Engineering design documents like

OptiX RTN 600 Radio Transmission System Network Planning Document

OptiX RTN 600 Radio Transmission System Engineering Design

Document

Commissioning guide documents like:

OptiX RTN 600 Radio Transmission System Commissioning Guide

OptiX RTN 600 Radio Transmission System Quick Installation and

Commissioning Guide


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Preparing Tools

The tools that are required include the common tools, special tools

and instruments. The recommended list is as follows:

Type Description

Common

tool

Adjustable wrench, percussion drill, sharp-nose pliers, and

electric knife

Special

tool

Anti-static glove, ESD-preventive wrist strap, telescope,

and intercom

InstrumentMulti-meter, BER tester, and laptop computer (installed

with the Web LCT), SDH Instrument

Adjust Slide


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Checking Commissioning Conditions

The NE commissioning conditions to be checked include the

status of the equipment as well as that of the laptop computer

used in the commissioning. The NE commissioning conditions are

listed as follows:

The hardware installation of the equipment must be complete, and it

should pass the installation check.

The power supply of the equipment must be available.

The service signal cables connected to other equipment must be

routed well.

The laptop computer must be installed with the Web LCT, and

applications should work normally.


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Checking Commissioning Conditions (cont.)

The hop commissioning items to be checked include the NE

commissioning status as well as the weather conditions. The hop

commissioning conditions are listed as follows:

The NE commissioning of the radio equipment at both ends of the

same radio link must be complete.

The weather should be suitable, and there should no rain or fog

between stations.

The on-site conditions and the personnel in charge of antennacommissioning must meet the requirement on the operation at a high

altitude.


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Summary

This chapter describes the following contents:

NE commissioning items and hop commissioning items

Documents and tools prepared before the commissioning

Commissioning conditions


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Contents





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Contents


2.1 Powering On the Equipment

2.2 Testing Indicators

2.3 Accessing the Web LCT

2.4 Configuring the Data

2.5 Performing the Service Loopback test

2.6 Testing the Connections of the E1 Cables

2.7 Testing the Transmit and Receive Optical Power

2.8 Testing the RF Transmit Power

2.9 Testing the Active/Standby Cross-Connect Board Switching


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Powering On the Equipment

Prerequisites The hardware installation of the equipment must be complete, and it

should pass the installation check.

The input power must be available.

The power switch of the input power (such as the power box of the

cabinet) must be turned off.

Tools and Instruments

Multi-meter

Procedure

Set the SYS-PWR switch on the PXC board to O.

Set the ODU-PWR switch on the IF board to O.

Turn on the input power switch of the cabinet.


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Powering On the Equipment (cont.)

testing the voltage and polarization of the input power at the accesspoint (such as the output terminal of the power box on the cabinet) by

multi-meter. The voltage should range from -38.4 V to -72 V.

Set the SYS_PWR switch on the PXC board to I.

If the fan is available, first check it is working normally after power on.

Wait for about 20 seconds, and then observe indicators of each boardinstalled in the IDU.

The PROG indicator on the SCC board should be first on. After it

blinks and is lit green for some time, it should be off.

For details on the board indicators, refer to the OptiX RTN 600 Radio

Transmission System Product Description. Set the ODU-PWR switch on the IF board to I.

Note: The SYS-PWR and ODU-PWR switches on PXC and IF boards have

the locking device. They need to be slightly pull out before switch them.


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Testing Indicators

Prerequisites The equipment must be powered on for

more than five minutes.


None.

Procedure

Press the LAMP TEST button on the

SCC board, and indicators of all boards

should be on.

Release the LAMP TEST button, and

indicators of all boards should recover

to the status before the LAMP TEST

button is pressed.

LAMP

TEST

button


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Accessing the Web LCT

Prerequisites

The equipment must be powered on.


Laptop computer installed with the Web LCT

Network cable

Procedure

Start the laptop computer, and log in to the

operating system. Run the Web LCT program.

Connect the network port on the laptopcomputer to the ETH interface on the SCC

board through the network cable. The green

indicators of the ETH interface and network

port should be on.

NM interface


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Accessing the Web LCT (Cont.)

Set the IP address information of the computer, and log in to the NE.The IP address should comply with the following conditions:

IP address: The IP address should be in the 129.9.0.0 network section

and should be different from the default IP address of the NE

(129.9.191.240).

Subnet mask: 255.255.0.0. Default gateway: Null.

Double click the shortcut of Web LCT on the desktop. The login

interface of the Web LCT is displayed.

In the login interface of the Web LCT, enter the user name and

corresponding password. Click Login. The default user name is

admin, and the default password is T2000. If the user name and

password are correct, the NE List page is displayed in the IE.


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Configuring the Data

Prerequisites

The documents that are required by data configuration must be

available.


Web LCT

Procedure

Before configuring the NE data, create the NE, log in and modify the

ID settings of the NE according to the requirements in the Network

Planning Document. The OptiX RTN 600 can be configured in two modes, General Mode

and Wizard Mode. Users can choose the proper configuration mode

depending on the specific configuration scenarios. For details, refer to

the OptiX RTN 600 Radio Transmission System Configuration Guide.


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Testing Transmit and Receive Optical

Power

Prerequisites

The service data must be configured.

The 15-minute performance monitoring of the NE must be started.

The fiber connections must be normal.

Tools and Instruments Web LCT

Fixed optical attenuator or variable optical attenuator


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Testing the Transmit and Receive Optical

Power (cont.)

Procedure Disable the automatic laser shutdown (ALS) function of the laser, and

ensure that transmission of the laser is enabled.

Query the 15-minute performance by using the Web LCT to obtain the

values of the transmit and receive optical power. Based on the queried values along with the specifications of optical modules,

judge whether they are within the normal value range.

If the values are beyond the normal range, adjust the optical power by

increasing or decreasing the number of attenuators to ensure that the receive

and transmit optical power is within the normal value range.

Perform the loopback test for the services upon the completion of the

optical power test. Ensure that no bit errors occur in five minutes.


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Performing the Service Loopback Test

Prerequisites

The Web LCT must be logged in to successfully and its connection to

the NE must be normal.

The board must work normally.


Web LCT

BER tester or SDH analyzer


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Performing the Service Loopback Test

(cont.)

Procedure

Connect the board to be tested to the test instrument.

Issue the loopback command and observe the instrument for five

minutes.

Repeat the above two steps to test each board. The service loopback for the IF board can only be implemented by

testing the services of other service boards.

Adopt different loopback mode depending on the actually used

instrument.

If the SDH analyzer is used to test the optical interface board, first usethe optical power meter to test the optical power before the test and

use the attenuator to ensure that the optical power is within the normal

range. This can protect the instrument and the board.


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Testing E1 Cable ConnectionsUsing a BER Tester

Prerequisites

The E1 port must be transferred through the DDF.



Web LCT

BER tester

Procedure

Connect the BER tester to the first E1 port of the OptiX RTN 600 at

the DDF.

Set the corresponding E1 port to outloop by using the Web LCT.

Observe the BER tester. The AIS alarm displayed on the BER tester

should be cleared.


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Testing E1 Cable ConnectionsUsing a BER Tester (cont.)

Release the outloop of the E1 port by using

the Web LCT.

Observe the BER tester. It should report the

AIS alarm.

Repeat the above five steps to test other E1ports.

Tip

Connect all E1 ports in a serial manner and set all

of them to outloop by using the Web LCT. In this

way, you can check whether all E1 ports arenormal at the same time. If any fault occurs, you

also need to locate it segmentally.


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Testing the Connections of E1 Cables Through PRBS

1. At the DDF, use an E1 cable to loop back the services over the first E1port towards the tributary board.

2. On the Web LCT, select the E1 interface board in the Object Tree.

3. In the function tree, choose Configuration > PRBS Test.

4. Select the first E1 port, and then set the PRBS-related parameters.

Direction: Tributary

Duration: 5

Measured in Time: s

5. Click Start to Test. The system displays a prompt dialog box.

6. Click OK.

R2 New Slide


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Testing the Connections of E1 Cables Through PRBS

7. When the Progress column is 100%, click Query to check the testresult. The Total PRBS column should be 0, and the curve diagram

should be green.

8. Release the loopback set in 1.

9. Repeat 2 through 7 and check the test result. The curve diagram should

be yellow.

10. Repeat 1 through 9 to test all other E1 ports.

R2 New Slide


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Testing XPIC Cable

Prerequisites

The NE is running normal.

The IFX board is working normal.

Procedure

The XPIC Enabled parameter must be set to Enabled (default value) for the

IFX boards. Using an XPIC cable to loop back the XPIC IN port and XPIC OUT port for the

IFX board. Then check the color of the XPIC indicator.When the XPIC indicator

show green, it means the XPIC cable is normal.

R2 New Slide


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Testing the RF Transmit Power

Prerequisites

The service data must be configured and the performance monitoring

of the NE must be started.

The ATPC function must be disabled.


Procedure

In the NE Explorer, select the ODU that requires querying the RF

transmit power and query RF Transmit Powerin the performance

events.

Browse the performance events in the window. The difference

between the queried value of the RF transmit power and the preset

value should be less than 0.1 dB.

If the tested value is abnormal, contact Huawei for solutions.


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Testing Active/Standby Cross-connect

Board Switching

Prerequisites


The 15-minute performance monitoring of the NE must be started.

The equipment must be configured with the active and standby cross-connect boards.


Web LCT

BER tester


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Testing Active/Standby Cross-connect

Board Switching (Cont.)

Procedure Confirm the current working status of active and standby PXC

boards and no abnormal alarms by using the Web LCT.

Perform active/standby PXC board switching by Web LCT.

Query the working status of the active and standby PXC boards to

check whether the switching is performed normally.

Query the current and history alarms to check whether any alarm is

generated during the switching process.

After the test, restore the PXC board in slot 1 to the active board.

Query the alarms and ensure that the cross-connect board works

normally.

If you use the BER tester to monitor the services, few bit errors may

occur during the switching process. The services, however, can

recover immediately after the switching is complete.


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Questions

What is the procedure to access Web LCT?

How should the E1 port be set and connected for testing the connections

of E1 cables? What method can we adopt for testing this item quickly?

Why the ATPC function is disabled when the RF transmit power is tested?

What are the two modes in data configuration? What are the differences

between them?


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Summary

This chapter describes the prerequisites, tools and instruments, and

procedure for the NE commissioning items:

Powering on the equipment

Testing indicators

Accessing the Web LCT

Configuring the data

Testing the transmit and receive optical power

Performing the service loopback test

Testing the connections of E1 cables Testing the XPIC Cables

Testing the RF transmit power

Testing the active/standby cross-connect board switching


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Contents





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Table of Contents


3.1 Aligning the Antenna

3.2 Testing the ECC

3.3 Testing the E1 Service

3.4 Testing the WS Service

3.5 Testing the order wire

3.6 Testing the Clock Tracing

3.7 Testing the IF 1+1 Switching

3.8 Testing the SNCP Switching

3.9 Testing the 24-Hour BER


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Aligning the Antenna

Prerequisites The NE commissioning of the radio equipment at both ends of the same radio

link must be complete.

During the commissioning, the weather should be suitable and there should be

no rain/fog between stations.

The on-site conditions and personnel in charge of the antenna commissioning

must meet the requirements of operation at a high altitude.

The ATPC function is disable.


Wrench, multi-meter and intercom.

Note: If there are two antennas at each site, it needs to align the mainantennas and diversity antennas at both ends respectively. First align the

main antennas and then the diversity antennas. Both antennas at local site

should be aligned with the main antenna at opposite end.

R2 New Slide


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Aligning the Antenna

Aligning the antennas is the most important activity in the HOP commissioning,and its result has a direct effect on the performance of the radio link. There are two

types of antenna Single-Polarized Antenna, dual-Polarized Antenna .

When you align the single-polarized antennas, you need to align the main lobe of

the antenna signals by adjusting the azimuth angle and elevation angle of the

antennas at both ends.

When you align the dual-polarized antennas, you need to align the main lobe of the

antenna signals by adjusting the azimuth angle and elevation angle of the

antennas at both ends. You also need to adjust the feed booms of the antennas

and ensure that the Cross-Polarization Discrimination (XPD) meets the specified

requirements.

R2 New Slide

Adjust Slide


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Aligning the Single-Polarized Antennas

Procedure

1. According to the designed received signal level (RSL) along with the

relationship curve between the VBNC and RSL described in the user

documents (shipped with the equipment) of the ODU reference

documents, read the designed value of the VBNC.

2. Align the antennas at both ends approximately by using the specific tool

(telescope) or instrument (COMPASS or GPS). If the antennas at bothends are not aligned approximately, the VBNC cannot be adjusted to the

designed value.

3. Fix the antenna at the opposite end, and adjust the azimuth (elevation) of

the antenna at the local end in a wide range. Use the multi-meter to

observe the VBNC value of the ODU at the local end. At least three peaksignals should be detected and the voltage of the peak signal in the

middle should be maximum. When the VBNC reaches the maximum value,

tighten the antenna. When the antenna is being tightened, keep that the

VBNC is always the maximum.

Adjust Slide


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Aligning the Single-Polarized Antennas (cont.)

4. As step 3, adjust the elevation (azimuth) of the antenna. And tighten it.

5. Tighten the antennas at the local end. Repeat steps 3 and 4 to adjust

the antennas at the opposite end and tighten them.

6. Repeat steps 3 to 5 for two to four times. When the RSL of the

antennas at the local end and the remote end reach the maximum

value, tighten the antennas at both ends.

7. Test VBNC of ODUs at both ends by multi-meter. Read the actual

receive power level (RSL) by referring to the relationship curve between

the VBNC and RSL for the ODUs at both ends. The difference between

actual RSL value and its designed value should be ranged from -3 dB

to +3 dB.

8. If the VBNC does not meet the above requirements, check whether the

antennas at both ends are approximately aligned by referring to the

step2. Also you can refer to the OptiX RTN 600 Radio Transmission

System Maintenance Guide for solutions.

9. After antennas aligning is complete, tighten all screws of the antennas.

R2 New Slide


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Aligning the Dual-Polarized Antennas

Step 1: Power off the vertically polarized ODUs at both ends of the radiolink, power on the horizontally polarized ODUs at both ends of the radio

link, and thus ensure that the antennas transmit horizontally polarized

signals.

Step 2: Adjust the azimuth angle and elevation angle of the antennas at

both ends by referring to Aligning the Single-Polarized Antennas, andensure that the main lobe of the horizontally polarized signals is aligned

with the antenna.

Step 3: Measure the RSL (P1) of the horizontally polarized signals at the

local end.

Use a multimeter to measure the signal level on the RSSI port of the

horizontally polarized ODU.

Calculate the RSL (P1) of the horizontally polarized received signals

by referring to the curve diagram in the ODU box.

R2 New Slide

R2 New Slide


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Aligning the Dual-Polarized Antennas (cont.)

Step 4: Adjust the feed boom at the local end, and ensure that the RSL ofthe vertically polarized signals reaches the lower threshold (P2).

Power on the vertically polarized ODU at the local end.

Use a multimeter to measure the signal level on the RSSI port of the vertically

polarized ODU.

Release the holder of the feed boom a little bit, and turn the feed boom slightly

until the signal level reaches the lower threshold.

Calculate the RSL (P2) of the vertically polarized signals by referring to the

curve diagram in the ODU box. The calculated XPD1 (XPD1 = P1 P2) should

not be less than 30 dB.

R2 New Slide

R2 New Slide


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Step 5: Record the angle (D1) of the current feed boom. Step 6: Power off the horizontally polarized ODUs at both ends of the

radio link, power on the vertically polarized ODUs at both ends of the

radio link, and thus ensure that the antennas transmit vertically polarized

signals.

Step 7: Measure the RSL (P3) of the vertically polarized signals at the

local end by referring to 3.

Step 8: Power on the horizontally polarized ODU at the local end, and

calculate the level (P4) of the horizontally polarized signals received at

the local end by referring to 4. The calculated XPD2 (XPD2 = P3 P4)

should not be less than 30 dB.

R2 New Slide

R2 New Slide


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Step 9: Record the angle (D2) of the current feed boom.

Step 10: Repeat 3 through 9 to adjust the feed boom slightly (ranging

from D1 to D2), and ensure that XPD1 and XPD2 are not less than 30 dB.

Step 11: Tighten all the screws of the antennas.

Note: In the actual situation, you can align the dual-polarized antennas by

measuring only the vertically polarized signals

R2 New Slide


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Testing the ECC

Prerequisites

Antenna alignment must be complete.

The NE must have access to the Web LCT.


Precautions

Test the ECC at one end of the radio link.

Procedure

In the NE List page, click Add NE.


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Testing the ECC (cont.)

In the Add NE page, set the following attributes of the opposite NE: ID: ID of the opposite NE

Name: name of the opposite NE

Extended ID: extended ID of the opposite NE

Gateway Type: IP gateway

Gateway IP Address: IP address of the local NE

User Name: root (default)

Password: password (default for the user root)

Click OK. In this case, a row of data for the newly added NE is added

in the NE List page.

Observe Login Status of the newly added NE. Login Status should

be displayed as Logged In.


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Testing the E1 Service

Prerequisites The E1 service must be available between stations and the service

configuration at each station must be correctly delivered.



BER tester and Web LCT

Procedure

At local site, connect the BER tester to the first E1 port.

At remote site, loopback the first E1 port by cable. If cable loopback is

unfeasible, set the software inloop for the first E1 port by Web LCT.

Test the BER for 5 to 10 minutes by BER tester. No bit error should

occur.

Release all loopbacks.

Repeat the above four steps to test other E1 ports one by one.

R2 New Slide


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Testing E3 (DS3) Services

Prerequisites

The E3 (DS3) service must be configured between stations.

Aligning the antennas must be complete.

Tools, Instruments, and Materials

SDH Analyser Web LCT

Procedure

Connect the SDH Analyser to the first E3 (DS3) port of the equipment on the local side.

On the equipment on the opposite side, use an E3 (DS3) cable to loop back the services

over the first E3 (DS3) port towards the tributary board, that is, hardware inloop over the

E3 (DS3) port. If the hardware inloop fails, perform software inloop over the E3 (DS3) port

by using the Web LCT.

Test the BER for 5 to 10 minutes by using the SDH Analyser . There should be no biterrors.

Release the loopback.

Repeat 1 through 4 to test other E3 (DS3) ports


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Testing the WS Service

Prerequisites

The WS service must be configured.



BER tester

Procedure

At local site, connect the BER tester to the WS port.

At remote site, perform the hardware inloop for the WS port.

Test the BER for 5 to 10 minutes by BER tester. No bit errors shouldoccur.

Release the loopback.


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Testing the order wire

Prerequisites The order wire phone must be correctly installed at the station.

The data of the order wire must be configured.



None.

Procedure

Check the status of the order wire at the local equipment side. The

status of the order wire should meet the following requirements:

The ringing switch must be set to ON.

The dialing mode switch must be set to T, that is, the dual-tone dialing

mode is selected.


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Testing the Order wire (cont.)

Dial the order wire of the opposite equipment as follows:

Pick up the order wire, and press the TALK key on the front panel of the

phone. The red indicator on the upper right side of the front panel is on,

accompanied by the dial tone.

Dial the order wire number of the opposite equipment. Normally, the voice

quality is good and the voice is clear.

Answer the order wire.

The maintenance personnel at the opposite equipment side dials the order

wire of the local equipment. Normally, the order wire rings and at the same

time the red indicator on the upper right side of the front panel is on. Pick up the phone, and press the TALK key to talk. The red indicator on

the upper right side of the phone is on. Normally, the voice quality is good

and the voice is clear.


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Testing the Clock Tracing

Prerequisites The clock tracing priority list must be configured.


Web LCT

Procedure Query the current clock priority table by using the Web LCT.

According to the clock priority table, query whether the current clock

tracing source is traced normally.

If the active and standby PXC boards are configured, perform the

active/standby switching. This operation can check whether the currentclock source can be traced normally after the switching. After the test

is complete, restore the PXC boards in slot1 as active board.


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Testing the IF 1+1 Switching

Prerequisites

The equipment must be configured with the IF 1+1 protection.




Note: The following procedure considers the E1 service between

stations as an example. If no E1 service is configured between

stations, perform the test through the configured WS service (only

applicable in the SDH radio).


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Testing the IF 1+1 Switching (cont.)

Procedure At local site, connect the BER tester to one E1 port.

At remote site, loopback an E1 port by cable. Or set the software inloop

on an E1 port by web LCT when cable loopback is unfeasible.

Test the BER by BER tester. Confirm E1 service is normal.

View the working status of the protection group by using the Web LCT.

The Active Board of Device and Active Board of Channel should be

the active IF board.

Set the transmission status of the main ODU to mute by using the Web

LCT or power off the main ODU. This can trigger the IF 1+1 switching.

View the working status of the protection group after the switching by

using the Web LCT. The Active Board of Device and Active Board

of Channel should be the standby IF board. The HSB_INDI or

HSM_INDI alarm should be reported.


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Testing the IF 1+1 Switching (cont.)

View the BER by Web LCT. In the 1+1 HSB protection or 1+1 SD protection, service should recover after a

transient interruption.

In the 1+1 FD protection, service just has some bit errors without interruption.

After switching is complete, test the BER for 5 to 10 minutes. No bit errors

should occur.

Set the transmission status of the main ODU tounmute by using the Web LCT

or powering on the main ODU.

If the protection mode is set to Revertive mode, test the BER again by using

the BER tester. When the restore time arrives, the result should indicate that

the service has recovered after a transient interruption. WTR Time is set to

600s by default. Test the BER according to the requirements of the actual

configuration.


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Testing the SNCP Switching

Prerequisites The equipment must be configured with the SNCP protection.




Procedure

At local site, connect the BER tester to one E1 port.

At remote site, loopback the corresponding E1 port by cable. Or set

inloop on the E1 port by web LCT when cable loopback is unfeasible.

Test the BER by BER tester. Confirm E1 service is normal.


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Testing the SNCP Switching (cont.)

Check SNCP status of E1 service by Web LCT. And status should benormal.

Trigger the SNCP switching by disconnecting the fiber connectors or

powering off the ODU in the working channel of the E1 SNCP service.

View the abnormal events of the NE by Web LCT. The abnormalevents of SDH SNCP Switching are displayed in Abnormal Event List.

View the BER test result. The result should indicate that the service

has recovered after a transient interruption.

Reconnect the fiber connector or power on the ODU.

In the Revertive mode, when the restore time arrives, the BER tester

result should indicate that the service has restored back. WTR Time is

set to 600s by default.

Test the BER depending on the requirements of the actual

configuration.


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Testing the 24-Hour BER

Prerequisites Antenna alignment must be complete.



Precautions If the 24-hour BER cannot be tested for each hop on the link because

of the restrictions of the actual situation, choose the E1 service of the

first node and terminal node of each link to perform this test. This

operation ensures that the test path covers all the radio links.

The following test procedure considers the E1 service betweenstations as an example. If no E1 service is configured between

stations, perform the test through the configured WS service (only

applicable in the SDH radio).


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Testing the 24-Hour BER (cont.)

Procedure At local site, extract several typical

E1 services, and perform the

hardware inloop for the E1 ports. If

the hardware inloop is unfeasible,

perform the software inloop for theE1 ports by using the Web LCT.

At remote site, connect the E1

services in a serial manner at the

DDF, and access them to the BER

tester. Test the 24-hour BER by using the

BER tester.

Record the test result. The result

should indicate that no bit errors

occur.


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Testing the 24-Hour BER (cont.)

Postrequisites

If bit errors occur in the first 24-hour BER test, remove the fault.

Perform another 24-hour BER test until the test is passed.

If bit errors occur in the test for a serial connection, locate the fault by

using the dichotomizing search or other methods until each channel

passes the 24-hour BER test independently.

R2 New Slide


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Testing N+1 Protection Switching

Prerequisites The equipment must be configured with N+1 protection.

Aligning the antenna must be complete.

Tools, Instruments, and Materials

BER tester

Web LCT

Precautions

The following test procedure takes the E1 services between stations

as an example. If the E1 service is not configured between stations,perform the test through other configured services such as WS

services.

R2 New Slide


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Testing N+1 Protection Switching (cont.)

Procedure

Connect the BER tester to an E1 port of the equipment on the local side.

On the equipment on the opposite side, perform hardware inloop over the E1

port. If the hardware inloop fails, perform software inloop over the E1 port by

using the Web LCT.

Test the BER by using the BER tester. There should be no bit errors. Check the working status of the board by using the Web LCT.

Select an NE from the Object Tree in the NE Explorer. Choose

Configuration > Link Configuration from the Function Tree.

Select the N+1 Protection tab page, and click Query. The Switching

Status of the working unit and the protection unit should be Normal.

Power off the ODU through the power switch on the active IF board that

transmits E1 services data.

R2 New Slide


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Testing N+1 Protection Switching (cont.)

Check the BER test result. The service should recover immediately after a

transient interruption.

After the switching is complete, perform BER test for 5 to 10 minutes. There

should be no bit errors.

Power on the ODU through the switch on the active IF board.

Test the BER again by using the BER tester. When the WTR time expires, theservice should recover immediately after a transient interruption. WTR Time is

set to 600s by default. Test the BER depending on the actual configuration.

Release the loopback set in 2.

Refer to 1 through 10 to test the N+1 protection switching of the equipment on

the opposite side.


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Questions

Can you describe the procedure for aligning the antenna?

How long does it take to test the E1 / WS / E3/ DS3 service respectively by using the

BER tester?

What alarms occur after the IF 1+1 switching is complete?

What alarms occur after the N+1 protection switching is complete?

How can we ensure that the switching is performed after the SNCP switching is

complete?

How should we handle bit errors occurring in the 24-hour BER test?


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Summary

The commissioning items in hop commissioning:

Aligning the antenna

Testing the ECC

Testing the E1 service

Testing the WS service

Testing the E3 service

Testing the order wire

Testing the clock tracing

Testing the IF 1+1 switching

Testing the SNCP switching Testing the 24-hour BER

Testing the N+1 protection switching


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Thank You

www.huawei.com

Date post:	03-Apr-2018
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