Carrier Access Access Navigator user manual Send DS1 Payload Pattern with BER Test

Diagnostics & Troubleshooting

Send DS1 Payload Pattern with BER Test

Send DS1 Payload Pattern with BER Test

This command transmits a framed test pattern and performs a Bit Error Rate Test (BERT) or pattern synchronization test to verify the quality of the DS1 signal reaching far-end CSU equipment, such as the Access Bank II. When the operator requests a p2e, qrss, or all-ones test pattern, the Access Navigator transmits the test pattern while using its internal Bit Error Rate Tester to measure the bit error rate. See Figure 15-26.For the all-zeros and 1-in-8 patterns, the Access Navigator tests for pattern synchronization.

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

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: Put the remote CSU in payload loopback mode before using this command for BER testing. (See DS1 CSU Loopup on page 15-31.)

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 15-13). Bit errors are also recorded in the BERT log (see “BERT Log” on page 7).

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.

	Access Navigator
Payload			Framed
		Code
Pattern
		Generator	Pattern
with BERT

Far End

Payload Loopup

Time Slot Interchange

Framer

Bit Error

Rate

Tester

Line

Interface

Unit

		IN	Access Bank II
DS1				CSU
	OUT				DS0s

Figure 15-26. Send DS1 Payload Pattern with BER Test

Access Navigator - Release 1.8 August 2003 15-49