Re: [codec] #5: Mention DTMF in requirements
Michael Knappe <mknappe@juniper.net> Fri, 02 April 2010 14:20 UTC
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From: Michael Knappe <mknappe@juniper.net>
To: "stephen.botzko@gmail.com" <stephen.botzko@gmail.com>, "stpeter@stpeter.im" <stpeter@stpeter.im>
Date: Fri, 02 Apr 2010 07:19:49 -0700
Thread-Topic: [codec] #5: Mention DTMF in requirements
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Subject: Re: [codec] #5: Mention DTMF in requirements
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Agreed. Mike ________________________________ From: codec-bounces@ietf.org <codec-bounces@ietf.org> To: Peter Saint-Andre <stpeter@stpeter.im> Cc: codec@ietf.org <codec@ietf.org> Sent: Fri Apr 02 10:01:42 2010 Subject: Re: [codec] #5: Mention DTMF in requirements I heard no decision as to DTMF tone encoding. As far as I am concerned, the question of whether the codec MUST encode DTMF tones accurately enough to be detected at the decoder output (or SHOULD or non-requirement) is still open. That question clearly is in-scope, and has nothing to do with signaling. Stephen Botzko On Fri, Apr 2, 2010 at 9:57 AM, Peter Saint-Andre <stpeter@stpeter.im<mailto:stpeter@stpeter.im>> wrote: How is the never-ending debate among DTMF signalling *methods* in-scope for the Codec WG? I think that Henning brought this up in Anaheim only to make sure that we test some DTMF tones. The signalling method is out of scope for the codec itself. On 4/2/10 7:53 AM, stephen botzko wrote: > Are you two suggesting that in-band DTMF is a MUST? Or alternatively a > SHOULD? > > Stephen Botzko > > On Fri, Apr 2, 2010 at 9:48 AM, James Rafferty > <James.Rafferty@dialogic.com<mailto:James.Rafferty@dialogic.com> <mailto:James.Rafferty@dialogic.com<mailto:James.Rafferty@dialogic.com>>> wrote: > > I'd agree with Steve that are still many deployments which do not > use RFC 2833 or RFC 4733. In our gateways, we've had to support > interworking variations of tone support such as INFO and in-band, in > addition to the RFC 2833 / RFC 4733. > > James > -----Original Message----- > From: codec-bounces@ietf.org<mailto:codec-bounces@ietf.org> <mailto:codec-bounces@ietf.org<mailto:codec-bounces@ietf.org>> > [mailto:codec-bounces@ietf.org<mailto:codec-bounces@ietf.org> <mailto:codec-bounces@ietf.org<mailto:codec-bounces@ietf.org>>] On > Behalf Of Steve Underwood > Sent: Friday, April 02, 2010 2:27 AM > To: codec@ietf.org<mailto:codec@ietf.org> <mailto:codec@ietf.org<mailto:codec@ietf.org>> > Subject: Re: [codec] #5: Mention DTMF in requirements > > On 03/29/2010 02:22 AM, Marc Petit-Huguenin wrote: > > On 03/28/2010 11:00 AM, stephen botzko wrote: > > > >> I would agree with this if I saw reasonable evidence that a > >> preponderance of gateways and sending systems provide the > signaling in > >> these RFCs. > >> > >> Since I am not sure that this is the case, I am unconvinced that > we can > >> totally remove the requirement. > >> > >> I'd also say that an encoder that detects the DTMF tones and > outputs the > >> RFC 4733/34 events would fully meet the requirement. > >> > > As former CTO of a VoIP provider, I never saw a PSTN provider not > supporting at > > least RFC 2833 (even if one of them did not declare it in its SDP) > > > > Perhaps the question can be asked at the next SIPit event. > > > Its true that RFC2833 is widely deployed. Its even true that many > systems have updated to RFC4733. Sadly, its also true that there are > still many quirky implementations widely deployed, and a lot of people > still need to interwork with audio DTMF. > > Steve _______________________________________________ codec mailing list codec@ietf.org<mailto:codec@ietf.org> https://www.ietf.org/mailman/listinfo/codec
- [codec] #5: Mention DTMF in requirements codec issue tracker
- Re: [codec] #5: Mention DTMF in requirements codec issue tracker
- Re: [codec] #5: Mention DTMF in requirements Christian Hoene
- Re: [codec] #5: Mention DTMF in requirements stephen botzko
- Re: [codec] #5: Mention DTMF in requirements Michael Knappe
- Re: [codec] #5: Mention DTMF in requirements, Tes… Christian Hoene
- Re: [codec] #5: Mention DTMF in requirements Marc Petit-Huguenin
- Re: [codec] #5: Mention DTMF in requirements stephen botzko
- Re: [codec] #5: Mention DTMF in requirements Marc Petit-Huguenin
- Re: [codec] #5: Mention DTMF in requirements, Tes… Wyss, Felix
- Re: [codec] #5: Mention DTMF in requirements, Tes… Steve Underwood
- Re: [codec] #5: Mention DTMF in requirements Steve Underwood
- Re: [codec] #5: Mention DTMF in requirements James Rafferty
- Re: [codec] #5: Mention DTMF in requirements stephen botzko
- Re: [codec] #5: Mention DTMF in requirements Peter Saint-Andre
- Re: [codec] #5: Mention DTMF in requirements James Rafferty
- Re: [codec] #5: Mention DTMF in requirements stephen botzko
- Re: [codec] #5: Mention DTMF in requirements Brian West
- Re: [codec] #5: Mention DTMF in requirements Brian West
- Re: [codec] #5: Mention DTMF in requirements Brian West
- Re: [codec] #5: Mention DTMF in requirements Brian West
- Re: [codec] #5: Mention DTMF in requirements Michael Knappe
- Re: [codec] #5: Mention in requirements, FAX? Christian Hoene
- Re: [codec] #5: Mention in requirements, FAX? James Rafferty
- Re: [codec] #5: Mention DTMF in requirements Christian Hoene
- Re: [codec] #5: Mention in requirements, FAX? Marc Petit-Huguenin
- Re: [codec] #5: Mention in requirements, FAX? Michael Knappe
- Re: [codec] #5: Mention DTMF in requirements stephen botzko
- Re: [codec] #5: Mention in requirements, FAX? stephen botzko
- Re: [codec] #5: Mention in requirements, FAX? Michael Knappe
- Re: [codec] #5: Mention DTMF in requirements Christian Hoene
- Re: [codec] #5: Mention DTMF in requirements stephen botzko
- Re: [codec] #5: Mention DTMF in requirements James Rafferty
- Re: [codec] #5: Mention DTMF in requirements Raymond (Juin-Hwey) Chen
- Re: [codec] #5: Mention DTMF in requirements Roman Shpount
- Re: [codec] #5: Mention DTMF in requirements Marc Petit-Huguenin
- Re: [codec] #5: Mention DTMF in requirements Wyss, Felix
- Re: [codec] #5: Mention DTMF in requirements stephen botzko
- Re: [codec] #5: Mention DTMF in requirements Roman Shpount
- Re: [codec] #5: Mention DTMF in requirements Roman Shpount
- Re: [codec] #5: Mention DTMF in requirements stephen botzko
- Re: [codec] #5: Mention DTMF in requirements Marc Petit-Huguenin
- Re: [codec] #5: Mention DTMF in requirements Raymond (Juin-Hwey) Chen
- Re: [codec] #5: Mention DTMF in requirements Brian West
- Re: [codec] #5: Mention DTMF in requirements Raymond (Juin-Hwey) Chen
- Re: [codec] #5: Mention DTMF in requirements Raymond (Juin-Hwey) Chen
- Re: [codec] #5: Mention DTMF in requirements Raymond (Juin-Hwey) Chen
- Re: [codec] #5: Mention DTMF in requirements Raymond (Juin-Hwey) Chen
- Re: [codec] #5: Mention DTMF in requirements Roman Shpount
- Re: [codec] #5: Mention DTMF in requirements Benjamin M. Schwartz
- Re: [codec] #5: Mention DTMF in requirements Roman Shpount
- Re: [codec] #5: Mention DTMF in requirements Peter Saint-Andre
- Re: [codec] #5: Mention DTMF in requirements codec issue tracker
- Re: [codec] #5: Mention DTMF in requirements stephen botzko
- Re: [codec] #5: Mention DTMF in requirements Raymond (Juin-Hwey) Chen
- Re: [codec] #5: Mention DTMF in requirements Kevin P. Fleming
- Re: [codec] #5: Mention DTMF in requirements stephen botzko
- Re: [codec] #5: Mention DTMF in requirements Koen Vos
- Re: [codec] #5: Mention DTMF in requirements stephen botzko
- Re: [codec] #5: Mention DTMF in requirements Wyss, Felix
- Re: [codec] #5: Mention DTMF in requirements stephen botzko
- Re: [codec] #5: Mention DTMF in requirements Michael Knappe
- Re: [codec] #5: Mention DTMF in requirements codec issue tracker