Technical Summary
This document describes informationally a basic set of media services
for SIP: media announcements, voiceXML dialogues, and the simplest
conference mixing. The approach to providing these uses special
Request-URIs and URI parameters. The approach does not provide
a general framework or extensibility, though the authors have paid
attention to compatibility with the SIPPING working group's conferencing
approaches.
Working Group Summary
This document received a number of discussions in the SIPPING WG
as to whether it should become an IETF work item. The WG did not
choose to develop this document, nor to work on this area.
RFC 3969 describes the registry for SIP URI parameters. It has an erratum
and states both that RFC 2434 Specification Required and Standards Track
RFC policies are needed to registry these parameters. The working group
was determined by AD/Chair re-review to not want Standards Track RFC, so
there is not a conflict for this document. The IANA in the process of
updating
the registry information to reflect this (see correspondence in the tracker
log).
Protocol Quality
The document was given Expert Review on its SIP aspects by SIPPING.
A URI review was given by Larry Masinter. Allison Mankin shepherded
it for the IESG. The authors report interoperating implementations.
RFC Editor Note:
OLD:
To date, none of the IETF audio MIME registrations have parameters.
Vendor-specific registrations, such as audio/x-wav, do have
parameters. However, they are not strictly needed for prompt
fetching.
On the other hand, the prevalence of parameters may change in the
future. In addition, existing video registrations have parameters,
such as video/DV. To accommodate this,
NEW:
A number of MIME registrations which could be used here have parameters,
for instance, video/DV. To accommodate this,
RFC Editor Note/IANA Note
OLD:
6. IANA Considerations
None.
NEW:
6. IANA Considerations
IANA will register the following parameters in the SIP/SIPS URI Parameters
registry, following the specification required policy of RFC 3969:
Parameter Name Predefined Values Reference
-------------- ----------------- ---------
play no <This RFC>
repeat no <This RFC>
delay no <This RFC>
duration no <This RFC>
locale no <This RFC>
param[n] no <This RFC>
extension no <This RFC>