Doubt related to URI parameters in remote-URI.

Hi,
I have very basic doubt related to URI parameters present in remote-contact
URI (i.e. top-most Route URI or Remote Contact URI).

Case 1: The remote-URI contains URI parameters like transport=TCP and
comp=sigcomp once INVITE dialog is established.
a) Is it mandatory for all the requests within the dialog to have
transport=TCP and comp=sigcomp in the via header, and there-by compress each
and every request and send it over TCP.
b) Can I send some request within the same dialog by retaining these
parameter in the request-URI, but not them copying them onto the via header,
thereby sending the request uncompressed and on UDP.

Case 2:  The remote-URI does not contain any URI parameters.
a) Can any request within the dialog be sent with any parameters like
transport=tcp;comp=sigcomp by putting them in via header irrespective of the
way first request within the dialog (Ofcourse, keeping the capabilities of
remote in mind) ?

In general, if the parameters in the remote URI don't have any binding on
the requests within the dialog, what is there significance??


Regards,
Vineet.

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