[cisco-voip] T1 Clocking on 3825 with First Generation VWIC-2MFT

[Jason Aarons (US)]

You need a VWIC2-2MFT-T1 "Second Generation MFT" which has dual PLLs to clock data independently.  What does show diag say you have ?

________________________________

From: cisco-voip-bounces at puck.nether.net on behalf of Jeff Anderson
Sent: Wed 6/21/2006 11:52 AM
To: cisco-voip at puck.nether.net
Subject: [cisco-voip] T1 Clocking on 3825 with First Generation VWIC-2MFT


I have the following configuration on a router:
 
network-clock-participate wic 0
network-clock-participate wic 1
network-clock-select 1 T1 0/0/0
network-clock-select 2 T1 0/1/0
 
Controller T1 0/0/0 is configured for clock source line
Controller T1 0/0/1 in not in use
 
Controller T1 0/1/0 is configured for clock source line
Controller T1 0/1/1 is not in use
 
The T1 on controller 0/0/0 is not showing any slip errors. The controller on T1 0/1/0 is slipping badly, about 2400 slips seconds in a 24 hours period.
 
I need to get this router configured for 2 independent clock sources, both using line. Controller 0/0/0 is a tie line to a PBX. Controller 0/1/0 is a T1 CAS to the carrier.
 
I think all I need to do is:
 
no network-clock-participate wic 0
no network-clock-select 1 T1 0/0/0
 
Can someone please confirm that my changes will correct the problem or offer a solution that will? Will someone also explain what would happen to calls in progress while the clock changes are being made?
 
Thanks,
Jeff 


 



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