10 sec call setup delay on H.323 gateway

Unanswered Question
Sep 19th, 2008

Hey guys. I'm having an issue with an H.323 gateway and long call-setup delay. It is taking around 10 seconds from the last digit input to the time it dials out. The calls are being handed to a Call Manager for processing to the PSTN. I've checked everything and can't find where I can minimize the delay. Any suggestions?

Thanks in advance.


I have this problem too.
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Jaime Valencia Fri, 09/19/2008 - 09:53

first thing to always check is dial plan overlapping, probably you have something in there that causes this to expect more digits

if still no avail modify the T_302 timer



if this helps, please rate

nalonsoamerex Fri, 09/19/2008 - 10:01

This is my dial-peer voip session to hand call to CCM. There is this one and the another one with preference 2 for the subscriber.

dial-peer voice 10 voip

preference 1

destination-pattern 9T

voice-class codec 100

voice-class h323 1

session target ipv4:##.##.##.##

dtmf-relay h245-alphanumeric

fax-relay ecm disable

fax protocol pass-through g711ulaw

ip qos dscp cs5 media

no vad

From the call manager it looks good. If I dial the same numbers over the cisco phones they dial out immediatly. What gives?

nalonsoamerex Fri, 09/19/2008 - 12:01

I figured it out. The destination pattern 9T is not specific enough and it was waiting for more digit inputs. I changed it to 9[1].......... and 9[2-9]......... and it's all good now.

Thanks for your help.

chadlincoln Mon, 09/22/2008 - 11:24

You can also set the interdigit time out under the telephony services.

timeout interdigit 7


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