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New Member

ISDN E1 issue


I would appreciate some thoughts on a ISDN E1 issue. BT (the Service Provider) have advised there are no faults on the line, I disagree with this and have an alarm indication on their NTE. From a sh controllers command I receive the below -BRWR0001#sh controller e1

E1 0/0/0 is up.

Applique type is Channelized E1 - balanced

Receiver has remote alarm.

alarm-trigger is not set

Version info Firmware: 20041023, FPGA: 16, spm_count = 0

Framing is CRC4, Line Code is HDB3, Clock Source is Line.

CRC Threshold is 320. Reported from firmware is 320.

Data in current interval (850 seconds elapsed):

640 Line Code Violations, 4205 Path Code Violations

2 Slip Secs, 3 Fr Loss Secs, 2 Line Err Secs, 0 Degraded Mins

0 Errored Secs, 0 Bursty Err Secs, 3 Severely Err Secs, 67 Unavail Secs

Total Data (last 3 15 minute intervals):

10330 Line Code Violations, 2573 Path Code Violations,

2 Slip Secs, 2 Fr Loss Secs, 4 Line Err Secs, 0 Degraded Mins,

3 Errored Secs, 0 Bursty Err Secs, 2 Severely Err Secs, 160 Unavail Secs

To my understanding line and path code violations relate to the physical ISDN line, can anyone shed more light?

Super Bronze

Re: ISDN E1 issue

Do you have your clock synchronization configured correctly?

You need more than just 'clock source line' nowadays...

See this URL, particularly the network-clock-participate and network-clock-seleect commands:



Please rate helpful posts...

Aaron Please remember to rate helpful posts to identify useful responses, and mark 'Answered' if appropriate!
New Member

Re: ISDN E1 issue


I already had this set, BT finally reset "all they could" and amazingly it came back up.

Thanks for the comment though, its appreciated.

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