Chad Stachowicz Wed, 08/06/2008 - 21:12

no it is not, slips are from misconfigured clocking, and should be at 0.

can you explain your situation so we can help you clock it?



bschear Thu, 08/07/2008 - 05:23

They have a site to site data T1 and voice PRI coming into the router. Here is config info etc.

T1 0/1/0 is up.

Applique type is Channelized T1

Cablelength is long gain36 0db

Description: PRI Circuit

No alarms detected.

alarm-trigger is not set

Soaking time: 3, Clearance time: 10

AIS State:Clear LOS State:Clear LOF State:Clear

Version info Firmware: 20060623, FPGA: 20, spm_count = 0

Framing is ESF, Line Code is B8ZS, Clock Source is Line.

CRC Threshold is 320. Reported from firmware is 320.

Data in current interval (335 seconds elapsed):

0 Line Code Violations, 0 Path Code Violations

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

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

Total Data (last 37 15 minute intervals):

2 Line Code Violations, 2 Path Code Violations,

2435 Slip Secs, 0 Fr Loss Secs, 0 Line Err Secs, 0 Degraded Mins,

2435 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs, 12 Unavail Secs

controller T1 0/1/0

framing esf

linecode b8zs

pri-group timeslots 1-24

description PRI Circuit

interface Serial0/0/0

bandwidth 1544

ip address

encapsulation ppp

no ip mroute-cache

service-module t1 timeslots 1-24

service-policy output VOICE-POLICY


interface Serial0/1/0:23

no ip address

encapsulation hdlc

no logging event link-status

isdn switch-type primary-ni

isdn incoming-voice voice

isdn map address .* plan isdn type unknown

no cdp enable

Rajesh Revuru Thu, 08/07/2008 - 06:54


You have to check the network clocking. Do "show network"

Slip seconds are usually caused because of clocking b/n router and carrier. Slip secs will result in poor voice quality.

Ayodeji Okanlawon Thu, 08/07/2008 - 07:19

Usualy this is due to inproper clocking configuration..

You need to have these lines in your config.

network-clock-participate wic 0

network-clock-select 1 T1 0/0/0 ..

You should configure to suit your controller slot numbers...


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