From: "Biju Kayakal" <[EMAIL PROTECTED]>

   A SIP endpoint receives a request containing the transport
   param as URI parameter in the To header ? 
   E.g.
   To: <sip:[EMAIL PROTECTED];transport=tcp>

   Should it copy this URI parameter in the To header when it forms the
   response ? 
   Also should it also copy this URI param into the From header when it has
   to send subsequent requests within this dialog ?

Yes.  But the From and To headers are nearly comments, so their values
do not matter much.

As for Table 1 in RFC 3261, it is not to be trusted -- the From and To
URIs should be allowed to be general, as sometimes that is required to
carry the needed meaning.

Dale
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