Re: [rtcweb] #1: RFC 4734 citation

Iñaki Baz Castillo <ibc@aliax.net> Wed, 31 October 2012 17:13 UTC

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From: Iñaki Baz Castillo <ibc@aliax.net>
Date: Wed, 31 Oct 2012 18:12:43 +0100
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To: Harald Alvestrand <harald@alvestrand.no>
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Subject: Re: [rtcweb] #1: RFC 4734 citation
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2012/10/31 Harald Alvestrand <harald@alvestrand.no>

> On 10/30/2012 02:06 PM, Iñaki Baz Castillo wrote:
>
>> 2012/10/23 rtcweb issue tracker <trac+rtcweb@trac.tools.ietf.**org<trac%2Brtcweb@trac.tools.ietf.org>
>> >:
>>
>>>   Telephone Event - [RFC4734]
>>>
>> Could somebody give some points about why DTMFs over media are
>> required in WWW? Isn't DTMF mechanism OLD enough to incorporate it
>> into WebRTC?
>>
>> Autoanswer: interoperability with legacy telephony world.
>>
>>  Autoanswer (and you should know this by heart now, it's been said so
> many times):
>
> Use case 4.3.2 from draft-ietf-rtcweb-use-cases-**and-requirements-09:
>
> 4.3.2.  Fedex Call
>
> 4.3.2.1.  Description
>
>    Alice uses her web browser with a service something like Skype to be
>    able to phone PSTN numbers.  Alice calls 1-800-gofedex.  Alice should
>    be able to hear the initial prompts from the fedex IVR and when the
>    IVR says press 1, there should be a way for Alice to navigate the
>    IVR.
>
> If you want to argue for having that use case deleted from the
> requirements, start a debate on that topic. If you have an alternative
> solution, state that in the positive as what should go into the -audio-
> draft instead of RFC 4734.



Well, as we all assume that media gateways are requried for
interoperability with other VoIP networks, I assume it would be not so hard
that the gateway receives the "DTMF's" via WWW means (HTTP, WebSocket...)
and generates RTP DTMF's in the legacy leg.

Anyhow I expect that it's not so hard to implement RTP DTMF's in a media
stack, but I would not like to hear about "my PBX's does not detect
Chrome's DTMF's". :)


-- 
Iñaki Baz Castillo
<ibc@aliax.net>