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2.Perform a bit error rate test (BERT) using the internal V.52 generator (as described in Section 5.3), or using a separate BER Tester. If the BER test indicates a fault, and the Local Line Loopback test was successful for both NetLink™s, you may have a problem with the twisted pair line connection.
5.2.3CSU Loop
The
When operating in ESF framing mode, loopback commands are issued via the Facility Data Link (FDL). The line loop message will cause a loop back before data enters the framer portion of the CSU. The payload loop message will cause the
The
5.3 BIT ERROR RATE (V.52) DIAGNOSTICS
The
When a 511, 2047, or QRSS test is invoked, the
511 | Initiates a |
| pattern generator and detector. |
2047 | Initiates a |
| pattern generator and detector. |
QRSS | Initiates a |
| pattern generator and detector. |
To perform a V.52 test, follow these steps:
1.Activate the local loopback or remote loopback diagnostic.
2.Activate the test pattern. This may be done in one of two ways:
a.Enter e Selected Pattern from the System Diagnostics/Statistics menu and toggle the <Spacebar> until the desired test pattern appears.
b. Enter c Test Pattern and toggle the [Spacebar] to send the selected pattern.
c.One of two result codes will appear to the right of the Test Pattern listing:
OK Indicates that the received test pattern is
BE Indicates that there are errors in the test pattern (to deliberately insert errors in the pattern, toggle
Error Insertion to ON).
39 | 40 |