On Oct 16, 2007, at 6:08 PM, Paul Kyzivat wrote:
The "bundled subscriptions" need to be negotiated in both
directions. That means something like:
INVITE must contain:
- these are the events I am willing to send
- these are the events I desire to receive
Do we need that first line ? Or do we just need "These are the events
I'm willing to receive. If I get them, great. If I don't, well, I
don't care, I'll assume that sending them wasn't important to you."
response must contain:
- these are the events I will send (subset from invite)
Same here. I don't think the receiver needs to know what events will
be sent. They already know that any events that will be sent will be
a subset of the events they've said they're ready to handle.
- these are the events you should send (subset from invite)
Let's take for example DTMF. If you tell me you can receive DTMF
events, I might send you some. If you don't, I won't send you any. If
you tell me you can receive DTMF events and I don't send any, do you
care whether it's because I don't know how or because I don't have
any to send you?
Is there a use case for turning this into a full bidirectional offer-
answer? If so, it's starting to sound a lot more like an event-media
session (described in SDP and negotiated by offer-answer) than what
I'm thinking would be appropriate for INVITE-bounded notification. Or
maybe its should be a pair of SUBSCRIBE-bounded opposing dialogs.
--
Dean
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