Hello all,
Wondering if anyone has come across this problem before or has any ideas?
We have about 10 sites around the country all showing these symptoms which when occur we lose voice either intermittantly or permanently. We need to get the SP to reset the line, or reboot the router to resolve.
The setup is:
2801 router with the following
c2801-ipvoice-mz.123-11.7.T
relevant config:
network-clock-participate wic 1
network-clock-select 1 E1 0/1/0
isdn switch-type primary-net5
!
voice-card 0
no local-bypass
!
!
!
voice service pots
fax rate disable
!
voice service voip
allow-connections h323 to h323
supplementary-service h450.12
fax protocol pass-through g711alaw
modem passthrough nse codec g711alaw
interface Serial0/1/0:15
no ip address
isdn switch-type primary-net5
isdn incoming-voice voice
no cdp enable
What we are seeing is that intermittantly, we are getting E1 controller outputs such as this:
E1 0/1/0 is up.
Applique type is Channelized E1 - balanced
No alarms detected.
alarm-trigger is not set
Version info Firmware: 20040713, FPGA: 15, spm_count = 0
Framing is CRC4, Line Code is HDB3, Clock Source is Line.
CRC Threshold is 320. Reported from firmware is 320.
Data in current interval (698 seconds elapsed):
3250 Line Code Violations, 3310 Path Code Violations
0 Slip Secs, 0 Fr Loss Secs, 682 Line Err Secs, 11 Degraded Mins
674 Errored Secs, 643 Bursty Err Secs, 10 Severely Err Secs, 0 Unavail Secs
Total Data (last 24 hours)
286159 Line Code Violations, 297530 Path Code Violations,
0 Slip Secs, 0 Fr Loss Secs, 52504 Line Err Secs, 868 Degraded Mins,
51673 Errored Secs, 49893 Bursty Err Secs, 883 Severely Err Secs, 0 Unavail
and on the router we are seeing:
Dec 9 14:25:28.076: %MARS_NETCLK-3-CLK_TRANS: Network clock source transitioned from priority 1 to priority 11
Dec 9 14:25:30.072: %LINK-3-UPDOWN: Interface Serial0/1/0:15, changed state to down
The SP has checked (and double checked)the line and cant see any errors at all on the line, but obviously from the output there are problems.
One possibility maybe that the clocking is drifting beyond the limits set by the SP and as such the E1 drops??
Maybe the SP termination equipment??
We have checked cabling, replaced the hardware and in doing this all may be well for a few weeks and then the clock slips return. Obviously when the E1 drops we lose voice.
We have many sites that work with no problems at all which make it all the more strange.
If anyone has any ideas or suggestions, they would be gratefully received.
Cheers,
Andy
