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Copyright 2006 Huawei Technologies Co., Ltd. All rights reserved.
OptiX RTN 600 Equipment
Commissioning
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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. Preparations for the OptiX RTN 600 Commissioning
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
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
2. NE Commissioning of the OptiX RTN 600
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.
Tools and Instruments
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.
Tools and Instruments
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.
Tools and Instruments
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.
Tools and Instruments
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.
The service data must be configured.
Tools and Instruments
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.
Tools and Instruments Web LCT
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 service data must be configured.
The 15-minute performance monitoring of the NE must be started.
The equipment must be configured with the active and standby cross-connect boards.
Tools and Instruments
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
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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Table of Contents
3. Hop Commissioning of the OptiX RTN 600
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.
Tools and Instruments
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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Aligning the Dual-Polarized Antennas (cont.)
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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Aligning the Dual-Polarized Antennas (cont.)
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.
Tools and Instruments 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.
Antenna alignment must be complete.
Tools and Instruments
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.
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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.
Antenna alignment must be complete.
Tools and Instruments
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.
Antenna alignment must be complete.
Tools and Instruments
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.
Tools and Instruments
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.
Antenna alignment must be complete.
Tools and Instruments
BER tester and Web LCT
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.
Antenna alignment must be complete.
Tools and Instruments
BER tester and Web LCT
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.
Tools and Instruments
BER tester and Web LCT
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.
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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.
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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.
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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
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