session
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...
However, clients establishing a session will not typically be willing
to wait until the dialog is established in order to begin compressing
messages. One of the biggest gains that SigComp ...
... the ability to compress the initial INVITE of a dialog, when the user
is waiting for the session to be established. Therefore, clients
need a means to obtain a comp=sigcomp ...
... URI from their outbound proxy
before the user decides to establish a session.
One solution to this problem is manual configuration ...
... Rosenberg, J., Schulzrinne, H., Camarillo, G., Johnston, A., Peterson, J., Sparks, R., Handley, M. and E. Schooler, "SIP: Session Initiation Protocol", RFC 3261prop, June 2002. ...