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

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

For an introduction to the new site, click here. If you'd prefer to explore, try our test area to get started. And see here for current known issues.

New Member

DTMF between SIP and GW problem

Hello, I have CUCM 8.6 connecting via a SIP trunk to a 2801 gateway router and then out to the PSTN via an ITSP SIP proxy.

The calls are find but DTMF is not working. I am using SCCP 7940 phones.

I have tried adding "dtmf-relay h245-alphanumeric" to my gateway dial peers.

I have tried adding "voice-class sip dtmf-relay force rtp-nte" to my gateway dial peers.

I have tried choosing both of the options under "Required Field" within CUCM trunk configuration.

I have tried selecting the "Media Termination Point Required" option within the CUCM Trunk configuration.

I tried selecting "Early Offer support for voice and video calls (insert MTP if needed)" within the SIP profile for the trunk.

No luck.

Can someone please tell me what I should try next ?

Thanks kindly.

  • IP Telephony
1 REPLY
Cisco Employee

DTMF between SIP and GW problem

Have you tried configuring rtp-nte on the outbound dial peer ot CUCM and checking the MTP required option on the CUCM SIP Trunk at the same time?

1.    enable

2.    configure terminal

3.    dial-peer voice number voip

4.    session protocol sipv2

5.    dtmf-relay rtp-nte

6.    rtp payload-type nte number comfort-noise [13 | 19]

7.    exit

Regards.

158
Views
0
Helpful
1
Replies