Message example

A simple Instant Message (IM) as SIP:

MESSAGE im:UserB@there.com SIP/2.0
Via: SIP/2.0/UDP 4.3.2.1
To: User B <im:UserB@there.com>
From: User A <im:UserA@here.com>
Call-ID: a5-32-43-12@4.3.2.1
CSeq: 1 MESSAGE
Content-type: text/plain
Content-Length: 16
 
Hi, How are you?

The response will be a 200 OK from B.

Note: the example uses IM URIs instead of SIP URIs.

A MESSAGE request can be sent at anytime (even without a session).

For further information about the work of the IETF working group on Instant Messaging and Presence Protocol (impp) see http://www.ietf.org/html.charters/impp-charter.html (Concluded 2004)

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