Notes from IETF Meeting SIP WG

* Karen ODonouhue taking notes

* Scott and his IPR notice

* my blabbering

Aparna Vemuri
-------------

SIP-T Context and Architectures

Purpose
feature transparency

Issues

* SIP MIME type negotiation - standard 415
* Want to be able to tell a UAS to ignore certain MIME types


- ISUP repitition problem

* not all ISUP parameters are needed; many will contain information
from origination side

Bill Marshall
-------------

Packetcable DCS work

changes in current version - all six now in compliance with rfc2026.

Manyfolks
---------

* handling of case where UAS wants preconditions, but UAC didn't
indicate support for it

Privacy
-------

* Needed to add proxy-require 
* removed authentication ?? sip security task force will handle
* OSPS removed
* editorial changes

State
-----

* Usage of Supported/Require added
* interaction with Hide. If Via headers hidden, then state headers
need to be hidden -> resulting in Proxy-Require

* will change syntax to include port number

Call Authorization
------------------

* only minor editorial changes

Architectural Draft
-------------------

* much larger in size


Proxy-Proxy
-----------

* DCS Specific extensions
tracing of obsence and harassing calls
resource coordination for packetcable
call transfer and three way calling
OSPS
Billing-Info
Require and Proxy-Require used

Next steps

* design complete
* maybe issues for inter-domain operation
* 4 documents for proposed


Consensus was achieved on adding four proposed drafts as wg items.
Informational draft will be on hold until proposed documents are
complete.

Henning Schulzrinne
-------------------

update on rfc2543bis

nothing thats not backwards compatible

not SIP/2.1

lots of clarifications

* ACK Forwarding
* consistencies between tables and texts
* e-e vs. h-h distinction has been deprecated, different table
which describes what proxies are allowed to do

* headers tentatively added

* separate call and transaction state machines

* cancel/invite are separable
(will need to add note on need for timer in cancel, since you may
not get a 487)

* addition of spirals

* split spec in half - framework and methods draft

MIB Draft
---------

* partition of MIB -

SIP common
UA
Server (proxy and redirect)
Registrar

support modules

* added support for multiple instances in the same system

* throttling

* some security things in there


Wednesday meeting
-----------------

MWI
+++

Henning: should check out POP and compare with that
Christian: why are you assuming that this is just voicemail? 
Rohan: we're not?
Christian: but you assume I have the same address for voice and email?
Ch: this is an application of presence, no? You should wait for presence
work to be complete
Scott: why not use snmp?
henning: don't be specific to voicemail

SIP-H.323 requirements
++++++++++++++++++++++

OSP Token
+++++++++

consensus was to include it as a header
question: can you include a reference to the token instead of the actual token?
question: maybe recommend tcp since the tokens are large

DTMF
++++

skip proposes that there are two problems - dtmf transport, readily
covered by RTP, and key input, which is a different problem.

Donovan proposes SUBSCRIBE/NOTIFY.

No conclusion.