[cisco-voip] DTMF SIP to Verizon, wrong payload type...

[Anthony Holloway]

I see you are setting EO = Forced on the CUBE, which the telco requires,
but are you using EO on the SIP trunk form CUCM to the CUBE?  What is your
DTMF Signaling Method set to on that Trunk?

The only command I run which I can see is missing from your config is:

voice service voip
  dtmf-interworking rtp-nte

But I'm not positive that's your problem.

-Anthony

On Thu, May 17, 2012 at 12:01 PM, Jonathan Charles <jonvoip at gmail.com>wrote:

> We have a SIP trunk to Verizon, Long Distance, Local and international
> work fine, however, for toll free calls, DTMF does not function.
>
> We are set to send RTP-NTE, but Verizon is saying that we are sending this:
>
> a=rtpmap:101 X-NSE/8000
>
> And it should be:
>
> telephone-event/8000
>
> And that is why it is failing.
>
>
>
> What configuration change can we do to force it to send the right DTMF
> method?
>
>
> This is on a Cisco 3825 CUBE running 12.2.20.T4 (per Verizon's request),
> there is a software MTP and Transcoder on the router (both in use)...
> Verizon says it is not their problem and closed their ticket.
>
> Relevant SIP Config:
>
>
> !
> voice call send-alert
> voice rtp send-recv
> !
> voice service voip
>  allow-connections h323 to h323
>  allow-connections h323 to sip
>  allow-connections sip to h323
>  allow-connections sip to sip
>  no supplementary-service sip refer
>  redirect ip2ip
>  h323
>   h225 display-ie ccm-compatible
>  modem passthrough nse payload-type 101 codec g711ulaw
>  sip
>   bind media source-interface MFR1
>   early-offer forced
>   midcall-signaling passthru
> !
> !
>
> dial-peer voice 800 voip
>  description OUTBOUND Voice SIP calls to VzB
>  destination-pattern 1800[2-9]......
>  voice-class sip dtmf-relay force rtp-nte
>  session protocol sipv2
>  session target sip-server
>  incoming called-number .
>  dtmf-relay rtp-nte
>  codec g711ulaw
>  no vad
>
>
> !
> sip-ua
>  retry invite 2
>  retry bye 2
>  retry cancel 2
>  registrar dns:verizonsipgateway expires 3600
>  sip-server dns:verizonsipgateway:5071
>  g729-annexb override
> !
>
>
> Jonathan
>
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