08-16-2007 07:15 AM - edited 03-14-2019 11:06 PM
We have 2 T1's coming into a voice gw. One is connected to telco via a pri for outbound calls. The other is connected to a IVR system via a T1 Cas e&m. The IVR is setup of to send faxes out and a dialpeer is setup to send these faxes to the PRI. Non Fax calls work fine for transfer..but Fax calls fail. I have noticed that on a transfer call the codec is negotiated @ g711 but the faxes have a codec of None. Is there something I am missing...these calls are non voip and a dsp is not used for the call...please advise.
Joe
08-16-2007 07:20 AM
Hi,
to begin with, please send "show controllers T1" and relevant configuration.
08-16-2007 07:31 AM
temp2811VGW#show controllers T1
T1 0/1/0 is up.
Applique type is Channelized T1
Cablelength is long gain36 0db
Description: Connection to IVR
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: 20060711, FPGA: 13, spm_count = 0
Framing is SF, Line Code is AMI, Clock Source is Line.
CRC Threshold is 320. Reported from firmware is 320.
Data in current interval (248 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
T1 0/1/1 is up.
Applique type is Channelized T1
Cablelength is long gain36 0db
Description: Connection to PRI
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: 20060711, 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 (248 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)
326 Line Code Violations, 4 Path Code Violations,
4 Slip Secs, 0 Fr Loss Secs, 1 Line Err Secs, 1 Degraded Mins,
4 Errored Secs, 1 Bursty Err Secs, 0 Severely Err Secs, 20753 Unavail Secs
I am pretty sure the last 24 hours includes the time we were getting the pri setup with telco...
dial-peer voice 23 pots
fax rate fax
direct-inward-dial
port 0/1/0:23
!
dial-peer voice 1270441 pots
description Outgoing PRI
preference 1
destination-pattern 1[2-9].........
fax rate fax
port 0/1/1:23
forward-digits 10
08-16-2007 08:15 AM
Hi,
if as you say the errors are related to setup times, it looks fine and well.
The only thing I canking of that you can try, is "no echo-cancel enable" on the IVR port, or both, and some tinkering with "output" and "input" gains. These are all under "voice-port".
08-16-2007 08:21 AM
Thought about that...do you think the fact that I see the codec negotiated on a voice call but not on a fax could could be an issue...
Thanks for you help on this...
Joe
08-16-2007 08:55 AM
Well, the call is hairpinned, that is no codec should be involved for either fax or voice.
The correct setting would be then "fax rate disable" under dial-peer.
08-16-2007 01:23 PM
Ok,
I understand the hairpinning...I changed my outgoing dialpeer to a fxo port and the fax completes fine...does this lead to something on the pri...I haven't made any changes to the config other than the dial-peer choosen...
Thanks,
Joe
08-16-2007 01:58 PM
Really no config problem is evident here. You may want to give this to the TAC, before you do that you may want upgrade something recent and stable, like 12.4(16).
EDIT:
One more thing. Please configure:
network-clock-participate wic x/y
network-clock-select 1 T1 x/y/z
Then confirm that the IVR system can be set for external clock, and set clock internal on the corresponding router T1. Check that you are still slip-free in show controller as you are now. That would be the preferred clock configuration.
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