Cisco Support Community
Showing results for 
Search instead for 
Did you mean: 

Welcome to Cisco Support Community. We would love to have your feedback.

For an introduction to the new site, click here. And see here for current known issues.

DTMF Relay question between SIP and H323

Im working on some CUBEs and they are working great with my provider, CUCM and phones.  But I have an issue coming across a GK site from a remote CUCM cluster via H323.   When the call goes from CUCM---GK---CUCM---CUBE----SIP Provider, my DTMFs are dead.  But if I go from my CUCM----CUBE---SIP Provider, DTFM is fine.

I have on my dial peer in CUBE:  DTMF-relay RTP-NTE.   Im wondering if I should either change this to dtmf-relay h245-alphanumeric or should I create a seperate dial-peer just for the inbound H323 calls from my remote GK clusters that will use dtmf-relay h245 and leave my CUCM SIP incoming on RTP-NTE?


New Member

DTMF Relay question between SIP and H323

You can have multiple dtmf-relay on dialpeer.  You could try dtfm-relay rtp-nte h245-alphanumeric h245-signal.

Re: DTMF Relay question between SIP and H323

Yeah, that’s what I was going to do next.

So how would it look then? All my calls from CUCM look like this:

dial-peer voice 1 voip

description lan side dial peer

preference 2

session protocol sipv2

session target ipv4:x.x.x.x

incoming called-number 5000

voice-class codec 1

voice-class sip options-keepalive up-interval 100 down-interval 50 retry 6

voice-class sip bind control source-interface GigabitEthernet0/2

dtmf-relay rtp-nte

Do I create another dial-peer with alphanumeric then?


New Member

Re: DTMF Relay question between SIP and H323

Just the change the dtmf-relay line to

dtfm-relay rtp-nte h245-alphanumeric h245-signal

Some times you have to change the rtp payload type  depends on what event Service provider supports.

We had to add these lines in the outbound/inbound dial-peers.

rtp payload-type nse 127

rtp payload-type nte 100

CreatePlease login to create content