Subject: Re: [SIP] Manyfolks draft question

From: William Marshall <[email-masked]>
Date: Mon, 4 Dec 2000 10:55:49 -0500 (EST)

Ameet,

The first round-trip negotiates the level of QoS to be established
for the session.  The UAC proposes something with the a=qos lines in
the SDP, and the UAS responds with its capabilities.  The UAS may
reduce the preconditions requested by the UAC.  Section 4.2 of the 
I-D gives details of the allowed couplings between UAS and UAC
in Tables 1 and 2.

In the particular case you are asking, the UAS receiving the
INVITE without the ability to do QoS would respond without
a "a=qos" line in the SDP, effectively meaning "none".  Then
there is no COMET in either direction, and the session proceeds
as Best Effort.

Bill Marshall
[email-masked]

-----original message-----
From: Ameet Kher <[email-masked]>
To: [email-masked]
Subject: [SIP] Manyfolks draft question
Date: Tue, 28 Nov 2000 12:11:28 -0500

Hi All,

Need a clarification on the latest version of Manyfolks draft.

What should happen if the UAS receiving an Invite with confirm tag does
not have
the ability to do QoS. Should a Comet be sent out by the UAS in this
case ? The call has proceeded as Best effort and the 183 sent out by the
UAS had
no "a" line in its SDP body.

Thanks
Ameet

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