Tools, Equipment and Materials
Step 11 Click Start to start activating the database
NOTE
Do not select Deliver to Board.
In NE View, Operation Status indicates the progress of activating the database. After the database is activated, Operation Status indicates that the operation is successful.
----End
8 Supporting Task
About This Chapter
This topic describes the common maintenance operations.
8.1 Hardware Loopback
Hardware loopback refers to the loopback operation performed by changing the physical connection.
8.2 Cleaning Fiber Connectors and Adapters
The optical connectors are easily contaminated in the maintenance process. The minute dust particles that can be seen only in the microscope can also affect the quality of optical signals. In this case, the system performance deteriorates. Hence, the fiber connectors or adapters that are terminated need to be cleaned in time.
8.3 Browsing Alarms, Abnormal Events, and Performance Events
The U2000 is used to browse alarms, abnormal events, and performance events at the network layer.
8.4 Querying a Report
You can obtain the version, manufacture, and microwave link information of all the boards by querying the corresponding report.
8.5 Software Loopback
Software loopback refers to the loopback operation that is implemented by using the NMS.
During software loopback, you need not visit the engineering site. Hence, software loopback is used more widely than hardware loopback.
8.6 Reset
Reset is an important method of troubleshooting software faults. Reset is classified into cold reset, warm reset.
8.7 PRBS Test
The pseudorandom binary sequence (PRBS) test is an important method of network maintenance and self-check.
8.8 Querying the License Capacity
You can check whether the loaded license file meets the requirements by querying the license capacity.
8.9 Setting the On/Off State of the Laser
When performing operations such as testing a fiber cut, you can set the on/off state of the laser rather than removing and re-inserting the optical fiber on site.
8.10 Setting the ALS Function
The SDH optical interface board supports the automatic laser shutdown (ALS) function. This function enables the board to turn off a laser when the board does not transmit services, the optical fiber is faulty, or the received optical signals are lost.
8.11 Setting the Automatic Release Function
To protect the communication between the NMS and NE against improper operations, an NE supports the automatic release of the ODU muting, software loopback, and other operations that require you to exercise caution. The automatic release time is five minutes by default. You can set whether to enable the automatic release function and the automatic release time through the NMS.
8.12 Configuring the Performance Monitoring Status of NEs
By default, the performance monitoring of NEs is enabled. You can disable or enable this function manually and set the period of the performance monitoring of NEs manually.
8.13 Querying the Impedance of an E1 Channel
The impedance of an E1 channel is 75 ohms or 120 ohms, which cannot be set through the NMS.
8.14 Monitoring Ethernet Packets Through Port Mirroring
To monitor and analyze the Ethernet packets at a port, you can enable the port mirroring function so that the received or transmitted packets on the port are duplicated to another Ethernet port to which the Ethernet tester is connected. Then, you can monitor and analyze the packets.
8.15 Querying the Attributes of an Ethernet Port
Through the operation, you can learn about the attributes of an Ethernet port, such as rate, MAC address, and actual working mode.
8.16 Switching the System Control Unit and the Cross-Connect Unit
When the OptiX RTN 950 is configured with two system control, cross-connect, and timing boards, you can manually switch the system control unit and the cross-connect unit as required.
8 Supporting Task
OptiX RTN 950 Maintenance Guide (U2000)
8-2 Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
Issue 05 (2010-07-30)
8.1 Hardware Loopback
Hardware loopback refers to the loopback operation performed by changing the physical connection.
Background Information
Hardware loopback is classified into optical cable loopback, PDH cable loopback, and Ethernet port loopback.
l Optical cable loopback indicates that the receive and transmit optical fibers are connected through a fiber jumper on the ODF. In certain occasions, an optical attenuator is added based on the actual situation, to prevent the optical board from being damaged by the excessive receive optical power.
l PDH cable loopback indicates that the receive and transmit PDH cables are connected through a short-circuiting cable or connector on the DDF.
l Ethernet port loopback indicates that the receive and transmit service signals on one Ethernet port are looped back through a special loopback Ethernet cable.
8.2 Cleaning Fiber Connectors and Adapters
The optical connectors are easily contaminated in the maintenance process. The minute dust particles that can be seen only in the microscope can also affect the quality of optical signals. In this case, the system performance deteriorates. Hence, the fiber connectors or adapters that are terminated need to be cleaned in time.
8.2.1 Cleaning Fiber Connectors by Using Cartridge Cleaners
When there are special cartridge cleaners (such as the CLETOP cassette cleaner), use them for cleaning the fiber connectors.
8.2.2 Cleaning Fiber Connectors by Using Lens Tissue
When there is no cartridge cleaners, use the lens tissue for cleaning fiber connectors.
8.2.3 Cleaning Fiber Adapters by Using Optical Cleaning Sticks
The fiber adapters need to be cleaned with optical cleaning sticks. This topic describes the method of cleaning fiber adapters on the optical interface board. The same method can be used to clean fiber adapters on the optical attenuators and flanges.
8.2.1 Cleaning Fiber Connectors by Using Cartridge Cleaners
When there are special cartridge cleaners (such as the CLETOP cassette cleaner), use them for cleaning the fiber connectors.
Prerequisite
l Disconnect both ends of the fiber. Ensure that there is no laser light on the fiber connectors.
l Inspect the fiber connector with a fiber microscope to ensure that the fiber connectors are contaminated.
Tools, Equipment, and Materials
Cartridge cleaner