Re: [codec] #5: Mention DTMF in requirements, Testing DTMF?
"Christian Hoene" <hoene@uni-tuebingen.de> Sun, 28 March 2010 14:22 UTC
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From: Christian Hoene <hoene@uni-tuebingen.de>
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Subject: Re: [codec] #5: Mention DTMF in requirements, Testing DTMF?
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Hi, I found some open source DTMF code at http://www.soft-switch.org/spandsp-modules.html Does anybody has access to nice DTMF sample files such as those describe in <http://www.soft-switch.org/spandsp_faq/ar01s13.html> http://www.soft-switch.org/spandsp_faq/ar01s13.html ? Christian --------------------------------------------------------------- Dr.-Ing. Christian Hoene Interactive Communication Systems (ICS), University of Tübingen Sand 13, 72076 Tübingen, Germany, Phone +49 7071 2970532 <http://www.net.uni-tuebingen.de/> http://www.net.uni-tuebingen.de/ From: Michael Knappe [mailto:mknappe@juniper.net] Sent: Friday, March 26, 2010 11:38 PM To: stephen.botzko@gmail.com; hoene@uni-tuebingen.de Cc: codec@ietf.org Subject: Re: [codec] #5: Mention DTMF in requirements I would agree with 'should'. Lot's of dtmf out there still, but also out of band options (rfc 2833 / 4733) that make in-band carriage less a concern for SIP telephony applications. Mik _____ From: codec-bounces@ietf.org <codec-bounces@ietf.org> To: Christian Hoene <hoene@uni-tuebingen.de> Cc: codec@ietf.org <codec@ietf.org> Sent: Fri Mar 26 18:10:31 2010 Subject: Re: [codec] #5: Mention DTMF in requirements Perhaps analog DTMF carriage is a SHOULD? I agree that out-of-band is preferable, however, there still are scenarios where coded DTMF tones will be sent. It would be nice (though IMHO not essential) for this carriage to work. Stephen Botzko On Fri, Mar 26, 2010 at 3:04 PM, Christian Hoene < <mailto:hoene@uni-tuebingen.de> hoene@uni-tuebingen.de> wrote: Hi, > If the point of this issue to allow this codec to be used to successfully > transit an IP network between two TDM networks, which is not the primary use-case. > I'd suggest that out-of- > band tone transport is far preferable to trying to ensure that the codec > will carry the tones adequately to allow them to be detected after > regeneration. I totally agree. Out-of-band is much better than inband. Sorry for my radical view but I believe that analog DTMF is an old and obsolete technology not worth considering anymore. Christian _______________________________________________ codec mailing list <mailto:codec@ietf.org> codec@ietf.org <https://www.ietf.org/mailman/listinfo/codec> 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