Carrier Access Access Navigator Send DS1 Line pattern Test, Example set ds1 9 line p2e15

CLI Language Reference

CLI Command List

Field

qrss

Description

Send QRSS pattern (a modified 220–1) with a maximum of 14 consecutive zeros and 20 consecutive ones. (Common stress test for T1 data applications.)

Example: set ds1 9 line p2e15

The CLI will provide a progress message indicating the progress of the command, as in the following example:

Message: Sending pattern. Use 'send ds1 <n> off' to stop.

Send DS1 Line <pattern> Test

NOTE: The DS1 must be set Out of Service, using the set ds1 <n> down command, before you can use loopbacks or test patterns.

NOTE: Sending an unframed pattern will cause a DS1 Loss of Frame (LOF).

NOTE: This command works with ESF and D4 (SF) framing.

NOTE: The p2e patterns are intended only for Access Navigator loop tests and for tests between two Access Navigators. Other test equipment will not recognize these patterns.

NOTE: Put the remote CSU or NIU in line loopback mode before using this command for BER testing. (See Send DS1 CSU Loopup, Send DS1 Network Loopup, and Send DS1 NIU Loopup.)

NOTE: The internal Bit Error Rate Testers (BERTs) are always monitoring the DS1 inputs. Anytime a BER test pattern is present, whether internally or externally generated, the BER for the last one-second interval can be displayed using the status ds1 command (see Status DS1 on page 18-159). Bit errors are also recorded in the BERT log (see Log BERT on page 18-40).

Purpose: Transmits an unframed test pattern and performs a Bit Error Rate Test (BERT) to verify the quality of the DS1 signal reaching far-end CSU equipment, such as the Access Bank II.

When the operator enters the test command, the Access Navigator generates and transmits the selected PRBS or QRSS test pattern while using its internal Bit Error Rate Tester to measure the bit error rate (see Figure 18-6). Sending an unframed pattern will cause a DS1 Loss of Frame (LOF) on both the Access Navigator and the remote CSU for the duration of the test.

After 10 seconds the pattern is turned off and the test results from the BERT are displayed in a CLI message. (The send ds1 <n> off command is not required to turn off the pattern.)

Access Navigator - Release 1.8 August 2003 18-67