This topic describes how to configure the PRBS test in the line direction initiated by the line board on the Web LCT. NE 1 is considered as an example.
Context
The configuration process is as follows:
- Perform a corresponding loopback for the section to be tested. For the available loopbacks, see Figure 2.
- Start the PRBS test in the line direction for the line board.
- Determine the working status of the tested section according to the test result.
The following procedure describes how to configure the PRBS test by describing how to configure an outloop on the second VC-4 path on the line board of NE 2 that is interconnected with the N1SF64 board of NE 1.
Precautions
NOTICE: When you set a loopback, make sure that no active service is running on the optical port or path on which a loopback needs to be performed. Otherwise, the active service is interrupted.
Procedure
- Perform an outloop on the second VC-4 path on the line board of NE 2. For information on the procedure, refer to Step 2 in Configuring the PRBS Test in the Cross-Connect Direction Initiated by the Tributary Board.
- In the NE Explorer, click the
shortcut icon to switch to NE 1 and click OK. - Select the N1SF64 board from the Object Tree and choose from the Function Tree.
- Select the VC4:2 path of the SDH_1 port and set the following parameters in the Set Test Parameters area:
- Direction: Line
- Duration: 10
- Measured in Time: s
- In the case of the other parameters, use the default values.
- Click Start to Test. When the Operation Result dialog box is displayed, click Yes.
- When Progress field is displayed as 100%, check the value in Total PRBS field.
- If the value is 0, no bit errors are detected in the test and the tested loop is normal.
- If the value is not 0, the value indicates the number of bit errors detected in the test. In this case, you need to analyze the causes of the bit errors and perform troubleshooting.