[cisco-voip] Slip Errors on our Routers

[Jeff Ruttman]

Greetings, 

 

We're getting some QoS complaints and lots of trouble faxing via an ATA.

 

I'm definitely not a router guy, but I'm trying to do some research.
It's my understanding that too many slip errors cause static and
choppiness.  And maybe even echo?

 

I don't know how many slip errors are "too many," but I'm thinking we've
surpassed that threshold.

 

We have this kind of line in our config:  network-clock-participate slot
x (pointing to the vwic).

 

I'm reading that we might need this set as well:  network-clock-select x
E1 x/x/x.  I haven't been able to see a line like that in our config.

 

Any comments?

 

The PRI at one of our sites is on this router interface: 

 

T1 0/3/1 is up. 

  Applique type is Channelized T1 

  Cablelength is long gain36 0db 

  Description: PRI xxxxxxx 

  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: 20060707, FPGA: 13, 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 (554 seconds elapsed): 

     0 Line Code Violations, 0 Path Code Violations 

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

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

  Total Data (last 24 hours) 

     0 Line Code Violations, 0 Path Code Violations, 

     8325 Slip Secs, 0 Fr Loss Secs, 0 Line Err Secs, 0 Degraded Mins, 

     8325 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs, 0
Unavail Secs 

 

 

Thanks

jeff 

 

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