Avaya CMC1 manual Install DS1/T1 CPE loopback jack

		Install DS1/T1 CPE loopback jack
2. Step through Table 62 to troubleshoot.
Table 62: DS1 Troubleshooting
	Condition	Solution
	The value of the	The loopback jack test is active.
	Test: cpe-loopback-jack field is
	Pattern 3-in-24

The value of the Synchronized field is N

The value of the Synchronized field remains N after 5 tries.

The value of the Bit-error count field is non-zero

The value of the Synchronized is Y

Retry the test 5 times.

Excessive bit errors are likely. Check for intermittent connections or broken wires in an SPE receive or transmit pair, and repair as necessary. Then repeat Step 1.

Repeat Step 1 several times.

The DS1 circuit pack has synchronized to the looped 3-in-24 pattern and is counting bit errors in the pattern.

The value of the Bit-error count field pegs at 75535 or increments by 100s or 1000s each time you repeat Step 1.

Suspect loose or corroded connections, severe crosstalk, or impedance imbalances between the two conductors of the receive or transmit pair. Wiring may need replacement.

The value of the Bit-error count field is 0

There are no obvious wiring problems. Verify this by repeating Step 1 at 1-minute to

10-minute intervals until you are certain.

If the test reports no errors for 1 minute, the error rate is less than 1 in 108. If the test reports no errors for 10 minutes, the error rate is less than 1 in 109.

3.Once you are fairly certain that the test is reporting no errors (after at least 1 error-free minute), confirm that the 3-in-24 pattern error detector is operating. Enter test ds1-loopUUCSS inject-single-bit-error,where UU is the cabinet number, C is the carrier letter, and SS is the slot number of the DS1 board.

Issue 10 June 2005 329