08-16-2011
09:29 AM
- last edited on
03-25-2019
08:08 PM
by
ciscomoderator
Hi,
Basic call works fine, but does not work extension dial number (DTMF).
Here's my scheme connections:
SIP H.323
SIP Provider <-------------->GW(Cisco2821)<-------------->CUCM8.5.1
Router configuration (see attachment).
Any ideas?
08-16-2011 09:45 AM
Hi there,
Try running a 'debug voip dial-peer' and make sure that you're not matching dial-peer 0 which has DTMF relay disabled.
HTH,
Chris
08-16-2011 09:55 AM
Do you have any MTPs defined. I see on the router, there are none.
08-16-2011 12:08 PM
Here is some info on DTMF and SIP that may help.
http://www.cisco.com/en/US/docs/ios/12_3/sip/configuration/guide/chapter8.html
08-16-2011 01:54 PM
Hi
Try forcing RFC 2833 or OOB DTMF on the SIP trunk pointing to the SP, dont use no preference option.
HTH
Tapan
08-18-2011 11:47 PM
SP requires RFC 3261, DTMF in-band.
08-19-2011 12:55 AM
First you need to decide how you want to transmit DTMF, be it in band or out of band. I think that out of band is best for voip. The most common way is to use rfc2833 (rtp-nte in cisco world).
You need to run a sip trace "debug ccsip messages" and look at what is being negotiated.
08-19-2011 06:31 AM
Clear requirements for the Provider:
RFC3261
DTMF in-band
codec G711a
Someone can describe the hardware setup step by step: Gateway, CUCM?
My brain is boiling ........
08-19-2011 07:38 AM
Hello,
Can you tell me is it inbound or outbound DTMF that is not working.. or both. From there I can help you.
Chad
01-04-2012 04:53 AM
Hi there,
anyone able to put it to work? I have the same problem with my service provider, which only supports inband voice dtmf
best regards
08-19-2011 05:38 PM
I would say you need to remove "dtmf-relay rtp-nte h245-alphanumeric" from your dial-peers.
Stavros
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