01-13-2009 03:45 PM - edited 03-15-2019 03:29 PM
Hello Guys.
We are experiencing troubles with incoming calls that normally takes 8 seconds to return the ring back to the person that is calling from the pstn. We discussed with the telco guys about this issue and they said that this delay is because of the router, which takes to long to answer wit the ring back. Do you have any idea that something that could solve this issue in call manager or router?
Thanks.
01-13-2009 05:29 PM
What's the call flow? Does (and which part) goes over a WAN?
-nick
01-13-2009 07:28 PM
GW? H323? MGCP?
CUCM? CME? versions?
had discarded overlapping DNs?
not enough info to provide any help
java
01-15-2009 12:29 PM
Hello.
The call comes as follow:
pstn--H323gateway--call manager 6.1(1)--Ipphone.
Telco guys said that when the router received the last digits that the pstn user dialed, it takes 8 seconds to call to be completed.
This guys are telling that they can not modify anythig at their side, because the router is the one which presents this delay.
Thanks.
01-15-2009 12:28 PM
Hi Nick.
The call comes as follow:
pstn--H323gateway--call manager 6.1(1)--Ipphone.
Telco guys said that when the router received the last digits that the pstn user dialed, it takes 8 seconds to call to be completed.
This guys are telling that they can not modify anythig at their side, because the router is the one which presents this delay.
Thanks.
01-15-2009 12:38 PM
A couple of things you can try:
If you have a PRI ( your diagram does not indicate what type of PSTN interface you have )
try this:
Serial0/0/0:23
no isdn overlap-receiving
On CUCM:
MTP required
Enable outbound fast-start
hth,
nick
01-19-2009 01:17 PM
sorry We are using e1 with R2 as signaling.
I don't now if these commands can help
01-19-2009 01:48 PM
You can still use those commands, as they are H323 commands.
However, E1 R2 has the tendency to be a very slow protocol. To troubleshoot this problem you would want to pull gateway traces as well as CUCM traces to see what's going on.
hth,
nick
01-19-2009 11:45 PM
Hi
Try using the command dnis-digit min X max X under cas custom
X is the number of digits of your ip phones extensions
This links explains a little.
http://www.cisco.com/en/US/partner/tech/tk652/tk653/technologies_tech_note09186a00800942f2.shtml
Txs
Pedro
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