Outside IVR making inbound call via SIP doesn't recognize our response via DTMF from our phones

[garyasher99]

We have a CME that is configured with a SIP provider and all works well including DTMF to outside organization's IVR.  We can navigate IVR systems when we make the outbound call.  Our issue is that we have a couple IVRs that call us and require us to navigate by pressing digits.  I have the dial-peers using voice-class sip dtmf-relay force rtp-nte.  The inbound calls do not recognize our choices.  I also don't know how to reproduce these calls, we are a provider and get these from our customers as they come in, only a couple a week.

My inbound dial-peer

dial-peer voice 700 voip
description SIP Trunk (incoming)
session protocol sipv2
session target dns:sip3.voipvoip.com
incoming called-number 555.......
voice-class sip dtmf-relay force rtp-nte
codec g711ulaw

Any ideas, please let me know.

Thanks,

Gary

[Balram Vishwakarma]

Hello Gary,

This would need below to logs to verify and isolate the issue.

debug voip ccapi inout
debug ccsip message
debug voip rtp session named-event

Meanwhile you can try removing the "voice-class sip dtmf-relay force rtp-nte" command and test below command.

dtmf-relay rtp-nte sip-kpml sip-notify

Thanks,
Balram

[garyasher99]

Balram,

I changed the command from voice class dtmf to dtmf-relay rtp-nte sip-kpml sip-notify.  I tested through an IVR and DTMF works.  So I have to wait for feedback from the client.

Thank you for your suggestion. I will comment when I hear from them.

Gary