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PSTN calls drop

metuzuner
Level 1
Level 1

CallManager 4.1(3)

Calls to/from PSTN are dropping intermittently. Internal calls for same cluster is fine.

No event viewer messages on the subscriber server.

Gateways are two Cisco 3745 with 2 PRIs on one and one on the other. Nothing in the GW logs.

Gateways were upgraded with c3745-adventerprisek9-mz.124-13e.bin 5 days ago. Issue has been reported this morning.

4 Replies 4

paolo bevilacqua
Hall of Fame
Hall of Fame

Hi, can you check "show controllers E1" or T1 if you have that for slips ? Chances are you need network-clock commands

"show controller t1" returns:

T1 1/0 is up.

Applique type is Channelized T1

Cablelength is short 133

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: 20060927, 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 (167 seconds elapsed):

0 Line Code Violations, 0 Path Code Violations

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

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

Total Data (last 24 hours)

2672 Line Code Violations, 3059 Path Code Violations,

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

0 Errored Secs, 0 Bursty Err Secs, 2 Severely Err Secs, 1917 Unavail Secs

Hi, no slips but many errors. Monitor the router and check if at the time the calls drops, the errors increase.

Turned out to be a DTCI equipment on the network side of pstn. Also, Cisco looked at the GW and couldn't find anything wrong.

Thank you.

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