http://www.dslreports.com/forum/UPDATE-Re-DTMF-Relay-Support-17471853 en Thu, 24 Mar 2022 20:21:20 EDT Thu, 24 Mar 2022 20:21:20 EDT http://www.dslreports.com/forum/Re-UPDATE-Re-DTMF-Relay-Support-17785657
My personal feeling is that something changed within Asterix and its support for RFC 2833 RTP Named Telephone Events payload. DTMF relay worked fine from May until sometime around August and one day it just stopped working. I made no changes on my end. I have to assume that an Asterix upgrade occured that caused interoperability with Cisco's RFC 2833 implementation to stop working.
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Ignorance is temporary...stupidity lasts forever!]]> http://www.dslreports.com/forum/Re-UPDATE-Re-DTMF-Relay-Support-17785657 Tue, 06 Feb 2007 22:36:17 EDT http://www.dslreports.com/forum/Re-UPDATE-Re-DTMF-Relay-Support-17764234
»www.cisco.com/en/US/prod ··· 03b.html

That being said, trying a phone with a SIP load has been on my list for a while now. Let me know if you find anything interesting.]]> http://www.dslreports.com/forum/Re-UPDATE-Re-DTMF-Relay-Support-17764234 Sat, 03 Feb 2007 15:16:06 EDT http://www.dslreports.com/forum/UPDATE-Re-DTMF-Relay-Support-17762847
»fonosip.com/english/call ··· ger.html

They specifically mention here that SCCP based phones do not use in-band DTMF relay which is a given. So Skinny phones require that you use sip-notify on the dial-peer for DTMF relay. Since ViaTalk only supports RFC 2833 it essentially looks like you are forced to run a SIP image on all your CME devices no matter what if you want DTMF relay to work. Arrgghh!! You'd think Cisco would translate automatically. Of course not... That is a feature to not allow that to occur.

Go down to the section titled "DTMF Relay for SIP Applications and Voice Mail". So all my IP phones are running a Skinny image and even my ATA 188 adapter is
running a Skinny image. I guess I need to convert a phone to SIP and test it out.

If this is the issue it will be one more big caveat to add to my CME/ViaTalk document.

I will post a follow up when I have a chance to test it out.
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Ignorance is temporary...stupidity lasts forever!]]> http://www.dslreports.com/forum/UPDATE-Re-DTMF-Relay-Support-17762847 Sat, 03 Feb 2007 10:23:28 EDT http://www.dslreports.com/forum/Re-DTMF-Relay-Support-17759467
Mine worked previously. I did not change configuration or IOS version and it stopped working one day. I would call my voicemail at my office or a conference call system and it would not register any number I punched on the phone, no matter if I used a 7960 IP phone or a regular analog handset attached to my ATA logged into my CME router via skinny.

I am using the same dial-peer configuration with 'dtmf-relay rtp-nte' set. Everything that I have heard or read states that ViaTalk switched to in-band DTMF which is not the same as rtp-nte. Cisco does not support the method that they are now using for DTMF relay.

Feel free to PM me and I can share configs.
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Ignorance is temporary...stupidity lasts forever!]]> http://www.dslreports.com/forum/Re-DTMF-Relay-Support-17759467 Fri, 02 Feb 2007 18:03:13 EDT http://www.dslreports.com/forum/Re-DTMF-Relay-Support-17758498
If you want to share part or all of your configuration with me, I can try to help you troubleshoot.]]> http://www.dslreports.com/forum/Re-DTMF-Relay-Support-17758498 Fri, 02 Feb 2007 15:29:17 EDT http://www.dslreports.com/forum/Re-DTMF-Relay-Support-17757984 http://www.dslreports.com/forum/Re-DTMF-Relay-Support-17757984 Fri, 02 Feb 2007 14:08:42 EDT http://www.dslreports.com/forum/BUMP-Re-DTMF-Relay-Support-17524512 http://www.dslreports.com/forum/BUMP-Re-DTMF-Relay-Support-17524512 Tue, 26 Dec 2006 10:24:30 EDT http://www.dslreports.com/forum/Re-DTMF-Relay-Support-17481614 http://www.dslreports.com/forum/Re-DTMF-Relay-Support-17481614 Mon, 18 Dec 2006 14:51:51 EDT http://www.dslreports.com/forum/DTMF-Relay-Support-17471853
I am running Cisco CME 4.0 on IOS 12.4(9)T2 and have been since May. DTMF relay stopped working a few months back but I haven't had anytime to look into it. I am using the 'dtmf-relay rtp-nte' option on my dial peers as recommended in the configuration posted on ViaTalk's website. I have searched around and it appears that ViaTalk is expecting to get actual DTMF tones in-band as sound and does not really fully support RFC 2833 for RTP DTMF in-band. I am using Cisco 7960 phones which don't generate actual DTMF in-band. This presents a problem when dialing out for conference calls etc.

Does anyone know the status of this issue or if ViaTalk sees this as a non-issue since Asterisk seems to handle it just fine? TIA.
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Ignorance is temporary...stupidity lasts forever!]]> http://www.dslreports.com/forum/DTMF-Relay-Support-17471853 Sat, 16 Dec 2006 20:26:01 EDT