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New Member

sh controllers E1 output


I need some help with understanding the following output, I have just had some issues with making receiving calls on our ISDN line. Could someone please advise on the output to help me understand, basically the Unavail secs, etc, path code violations what does this mean, is it the controller or ISDN line??

BRWR0001#sh controllers e1

E1 0/0/0 is up.

Applique type is Channelized E1 - balanced

No alarms detected.

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 (78 seconds elapsed):

0 Line Code Violations, 0 Path Code Violations

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

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

Total Data (last 24 hours)

26 Line Code Violations, 602 Path Code Violations,

2558 Slip Secs, 2 Fr Loss Secs, 6 Line Err Secs, 0 Degraded Mins,

2563 Errored Secs, 0 Bursty Err Secs, 3 Severely Err Secs, 157 Unavail Secs



Re: sh controllers E1 output

it seems you have clocking problems on the E1 controller.

1) try to syncronize your controller to external clock.

2) check your cable between the gateway and the pstn modem

3) check the connection between pstn modem and provider.

the following link may be usefull ..



New Member

Re: sh controllers E1 output

Thanks Mehmet

I am using a PVDM2-32 on a Cisco 2811 with 12.4(2), the link has been v helpful. Do the commands alter due to the above?


Re: sh controllers E1 output

ok, the link is for 26xx, 366x, and 37xx routers.

it is the same as 38xx or 28xx.



New Member

Re: sh controllers E1 output

Most likely it is the line. You need to place a call into you voice service provider (telco). You have a bad E1 line. All these erors reported by DSU/CSU errors. The pstn may blame your equipnment but be forcefull and ask for testing the line. If there is a discagreement you may have to put a loop on the line (physical loop is the least contention, for RJ-48 termination you can make your own, just cut off an end of a spare patch cable at least 5 inches from the connectior and strip the ends. You can now twist pin 1 to pin 4 and pin 2 to pin 5 on an RJ-48 plug.

PS. RJ-45 patch (ethernet works fine).

-- jerzy

New Member

Re: sh controllers E1 output

Previous post is correct. It is most likely clocking configuration. The slips are give away that I missed.

-- jerzy

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