04-07-2008 06:17 AM - edited 03-15-2019 05:00 AM
Hello , Iv a cm setup consisting of an ISDN PRI terminating on a 3825 configured as MGCP Gateway on Call manager 5.x setup. Calls are coming through(establishing) but there is no sound. Calls dont drop either until graceful disconnected by user. Configs are as attached. Ive not yet tried the outbound configs yet. Please help
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04-08-2008 04:35 AM
The MGCP setup looks ok. You might have DSP issues. Not sure what hardware you have but this link might help:
http://www.cisco.com/en/US/products/hw/modules/ps2617/products_tech_note09186a008039c316.shtml
Kevin
04-07-2008 06:34 AM
You have posted this already and think the answer given in the other post may be your fix action.
04-07-2008 07:38 AM
Mathew,
Yes I got a response but is has not helped. Any other idea.
Thanks
04-07-2008 07:58 AM
do you have the proper routing so the RTP from the GW is sent to the IP Phone IP???
any FWs?? ACLS?? anything that could block the RTP stream?
javalenc
04-07-2008 09:17 PM
Routing works fine. I can ping the Phones from the gateway and vice-versa. There is no FIREWALL or ACL implemented. Im just using two subnets : Subnet 1 for Gateway and CM and another for phones. I will try to collapse all into one subnet and see if this will help
04-08-2008 12:34 AM
04-08-2008 04:35 AM
The MGCP setup looks ok. You might have DSP issues. Not sure what hardware you have but this link might help:
http://www.cisco.com/en/US/products/hw/modules/ps2617/products_tech_note09186a008039c316.shtml
Kevin
04-08-2008 11:01 PM
Kevin/Team,
Thanks a lot for your kind assistance. The problem is actually not DSP but with clocking. I added 'network-clock-participate slot 1'and it is now working fine.
Kind Regards
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