Dear Bevilacqua,

Thanks for your prompt response, We have the following devices and software servers functioning on our IP telephony network.

1. Voice Gateways 2800 running IOS Ver.C2800NM-Advanced IP Services K9-MZ.124-50.T1.bin

2. Fax Gateway VG224 running IOS VG224-I6K9S-MZ.124-9.T.bin

3. Call Manager Ver.4.1(3)

Do you have PRI ? If yes send "show controllers E1".

Hi,

Please find below output of "show controllers E1" taken from two voice gateways.

VoiceGateway - 1:

SH CONTRolLers E1

E1 0/0/0 is up.

Applique type is Channelized E1 - unbalanced

Description: " Connected to RYHOF0C1ASC37-1 "

No alarms detected.

alarm-trigger is not set

Version info Firmware: 20070320, FPGA: 20, spm_count = 0

Framing is NO-CRC4, Line Code is HDB3, Clock Source is Line.

CRC Threshold is 320. Reported from firmware is 320.

Data in current interval (135 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)

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

E1 0/0/1 is down.

Applique type is Channelized E1 - unbalanced

Receiver has loss of frame.

alarm-trigger is not set

Version info Firmware: 20070320, FPGA: 20, 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 (137 seconds elapsed):

2081001 Line Code Violations, 117967 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, 138 Unavail Secs

Total Data (last 24 hours)

663365743 Line Code Violations, 36572233 Path Code Violations,

2668 Slip Secs, 207 Fr Loss Secs, 4515 Line Err Secs, 42 Degraded Mins,

2941 Errored Secs, 2941 Bursty Err Secs, 2146828446 Severely Err Secs, 81894 Unavail Secs

VoiceGateway - 2:

SH CONTROLLers E1

E1 0/0/0 is up.

Applique type is Channelized E1 - unbalanced

No alarms detected.

alarm-trigger is not set

Version info Firmware: 20070320, FPGA: 20, spm_count = 0

Framing is NO-CRC4, Line Code is HDB3, Clock Source is Line.

CRC Threshold is 320. Reported from firmware is 320.

Data in current interval (498 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)

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

E1 0/0/1 is up.

Applique type is Channelized E1 - unbalanced

No alarms detected.

alarm-trigger is not set

Version info Firmware: 20070320, FPGA: 20, 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 (500 seconds elapsed):

0 Line Code Violations, 0 Path Code Violations

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

181 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,

31316 Slip Secs, 0 Fr Loss Secs, 0 Line Err Secs, 0 Degraded Mins,

31316 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs, 0 Unavail Secs

Hope this information will get some ideas else please let me know if any more info required from my side.

Lots of thanks

Best Regards,

On both VGs, configure:

network-clock-particpate wic 0

network-clock-select 1 e1 0/0/0

That will prevent slips to occur and might fix your problem.

Hi,

I configured these commands and tested but the problem still exists any other ideas will be appreciated.

Thanks