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New Member

cannot put DTMF when I call


I use Call Manager and have a voice gateway. They are relyed by SIP trunk.

So When I call from the Call Manager to external call, there are an IVR in the called number.So i have to put many digit.

But the problem is that I cannot put the digit.

What is the problem?

The schema is :

CCM <-IP SIP Trunk -> Voice Gw <- E&M -> Router <-IP H323-> Voip Call

Thank you

  • IP Telephony
New Member

Re: cannot put DTMF when I call

What happens when you try to enter the first digit? Can you send me a copy of your config on the voice gateway?

Cisco Employee

Re: cannot put DTMF when I call

do you have configured the DMTF relay for NTE and sip-notify on the applicable dial-peers

in order for the GW to relay the DTMFs you need to configure it on the dial-peers and also what kind of DTMF is going to be relayed




if this helps, please rate
New Member

Re: cannot put DTMF when I call

The trunk with the call manager 5 is a SIP.

The dtmf preference is RFC 2833.

And in the gateway router is rtp-nte, that is RFC2833 too.

Should I replace it with sip-notify?

New Member

Re: cannot put DTMF when I call


The phone is a 7971G. With a 7911G I can use the dtmf, i can enter digits when the menu ask me.

But with the 7971G, I just hear a beep in the phone when I enter the digit menu.

Many Thanks.

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