[SIPForum-techwg] Comment on section 16.3 (DTMF)

[Elwell, John]

1. "Any Media Endpoint in the Service Provider's network MUST also
support the ability to transport DTMF tones using the RTP
telephone-event payload format as described in RFC 4733 when using any
codec.
Any Media Endpoint in the Enterprise network that originates and/or
terminates voice traffic MUST support RFC 4733."

Why are requirements slightly different for the two sides. Should we
combine these statements:
"Any Media Endpoint in the Enterprise network or Service Provider's
network MUST also support the ability to transport DTMF tones using the
RTP telephone-event payload format as described in RFC 4733 when using
any codec."

2. Concerning this same text, this doesn't explicitly make provision for
media endpoints that can transport DTMF but do not need to receive it.
So should we add the sentence:
"This applies to transmission and, if applicable, reception of DTMF
tones."?

3. "Any Media Endpoint in the Enterprise network that supports the
transport of DTMF tones MUST support the negotiation via an SDP
offer/answer of the supported method used to transport the tones."
Shouldn't this apply to SP endpoints too? A text proposal for this is in
an earlier email dealing with architecture.

John