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Proposed extensions to MSRP
New DISTSEND method
Endpoint sends a message to the MSRP switch for further distribution to a subset of the participants.
Recipient list includes SIP URIs, nicknames, TEL URLs, etc.
New method required to discover inability of the MSRP switch to do private messaging.
It always contains a Message/CPIM body.
Successful report for providing a hint of reception at MSRP switch and a hint of the sequence of message in which this message is inserted.

New Distribution header
Contains the list of recipients.
Recipients can be listed with any format, including an ID (SIP URI, TEL URI) or a nickname.

New DateTime header
Similar to the DateTime header in Message/CPIM.
Required to get information of the date/time the MSRP switch dispatched a message.
Avoid the MSRP switch to open Message/CPIM bodies just to insert it in Message/CPIM.

PPT Version