DTMF issue on CME

[raid_t]

Hi all,

We have a CME (C2851) with IOS 12.4(13r)T11, RELEASE SOFTWARE (fc1). A SIP Trunk is configured with ITSP. Calls work fine, inbound and outbound, however  typing the digits is not working eventhough we hear the tone when typed.

IP Phones are C7911.

Collected debugs and could see that ITSP uses raw inband.

SCCP phones does out-of-band DTMF?

Out of Band to Inband DTMF conversion is not supported?

Tried adding "dtmf-interworking rtp-nte" command, changing to different "dtmf-relay" options under dial-peer section.

Do you think it is possible to resolve this on our side? Or we check with ITSP if they could negotiated RTP-NTE or out of band DTMF for the call?

Thanks!

R.

[pqueued]

dtmf-relay rtp-nte sip-kmpl should do the trick

[Chris Deren]

Thank you for confirming, but that alone will not do the trick without properly defining inbound dial-peer as well, which is what I provided.

[pqueued]

yup, figured that was a given, but you're correct