T1 Slip sec occuring in Voice Gateway.

[bijoyjackjesse]

Hello All,

I have my VG 28xx to have Slips occur in the T1 circuit(only 1 T1 for the site).

Below is the controller t1 output.

T1 0/0/0 is up.

Applique type is Channelized T1

Cablelength is long 0db

Description: PRI for Voice

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: 20100222, 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 (620 seconds elapsed):

     0 Line Code Violations, 0 Path Code Violations

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

     103 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,

     14412 Slip Secs, 0 Fr Loss Secs, 0 Line Err Secs, 0 Degraded Mins,

     14412 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs, 0 Unavail Secs

Would using the cmd network-clock-select 1 T1 0/0/0 stop the Slip Secs and would configuring this bring a disruption of services.?

Thanks in advance for helping out.

Bijoy Jesse

[Aman Soi · Accepted solution]

Hi Bijoy,

Yes, u need to configure the above mentioned to stop slips.

before issuing this command , do "clear counters" and then, issue network-select command.

There would be definetely some disruption since the Circuit is being used for Voice .Above that, it would be better to do it and resolve the issue.

Refer this URL which explains clock mismatch leads to SLips.

http://www.cisco.com/en/US/products/hw/routers/ps259/products_tech_note09186a008031a072.shtml

https://supportforums.cisco.com/docs/DOC-3712;jsessionid=18015F10F9319ECDDE9BC8336A144994.node0

regds,

aman

[bijoyjackjesse]

Thank you Aman..!!!

Should the PRI needs to be reset after configuring the network-clock-select 1 T1 0/0/0.

Regards

Bijoy Jesse

[Aman Soi]

Hi Bijoy,

Not required.

regds,

aman