Subject: [MEDIACTRL] FW: Handling of SIP re-INVITE on cfw control channel

From: Stéphane Bastien <[email-masked]>
Date: Fri, 13 Feb 2009 07:00:50 -0800

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From: Stéphane Bastien
Sent: 23 janvier 2009 18:37
To: [email-masked]'
Subject: Handling of SIP re-INVITE on cfw control channel

Hi,

What operations are allowed during a SIP re-INVITE of the cfw-control channel?  For example, many Application Servers use a SIP re-INVITE (without changing the SDP) as a mean to audit the SIP dialog.

Also, what does happen to a SIP re-INVITE that tries to change the SDP? For example changing the cfw-id or local IP address?

Thanks,

Stéphane

P.S. Handling of a SIP re-INVITE on the media dialog is not well defined either. For example, what happens if the audio or video codec is changed? What is the impact of a codec change on an msc-ivr play back that is in progress?What is the impact on an msc-ivr recording?