PM3 CT1 CRC Errors

Scott Lagos (slagos@net1plus.com)
Tue, 22 Jul 1997 22:54:45 -0400

I have a PM3 that seems to be taking a lot of CRC errors on Line0

Here is the line config:

---------------------- line0 - T1 Inband DS0 ---------------

Status: UP Framing: ESF Encoding: B8ZS PCM: u-law

Signaling: Trunk E&M wink start

Receive Level: +2dB to -7.5dB

Alarms Violations
----------------------------- -----------------------------
Blue 0 Bipolar 0
Yellow 0 CRC Errors 113050
Receive Carrier Loss 0 Multiframe Sync 0
Loss of Sync 0

The CRC seem to be going up by about 1000 every few minutes. The telco
says that the line test clean.

This is a CT1 line provisioned as indicated above. I am not sure if the the
PCM is correct...? This is a T1 off of a fiber fed T3 back to the CO.

Can anyone suggest what I might try to isolate/correct the errors.