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Re: [sipcore] About SUBSCRIBE method's performance and Out-of-Dialog notification suggestion:

"Worley, Dale R (Dale)" <dworley@avaya.com> Tue, 04 January 2011 17:13 UTC

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From: "Worley, Dale R (Dale)" <dworley@avaya.com>
To: "DRAGE, Keith (Keith)" <keith.drage@alcatel-lucent.com>, "gao.yang2@zte.com.cn" <gao.yang2@zte.com.cn>, "sipcore@ietf.org" <sipcore@ietf.org>
Date: Tue, 04 Jan 2011 12:13:16 -0500
Thread-Topic: [sipcore] About SUBSCRIBE method's performance and Out-of-Dialog notification suggestion:
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Subject: Re: [sipcore] About SUBSCRIBE method's performance and Out-of-Dialog notification suggestion:
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________________________________________
From: DRAGE, Keith (Keith) [keith.drage@alcatel-lucent.com]

The key here is to understanding what dialog state needs to be maintained, and the proposal as currently described does not seem to change that.
________________________________________

I suspect that the question is dialog state maintained in intermediate elements, as many SIP systems coming from traditional telco companies implement intermediate elements as B2BUAs, and often have up to a dozen B2BUAs in what would be expected in SIP to be a single dialog.  I expect Gao will clarify the question when his day arrives.

Dale

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