Dear,

I am wondering whether we are still supposed to use sips-uri.
And, what about using 'transport=tls' parameter? 
As stated in RFC3261 below, it does seem already deprecated. 
But I still see some instances of using it. What do you think?

In case of sip peering relation, how does one end decide to send BYE
over TLS if the previous 200 OK from the other end response does not
contain 'transport=tls' in its contact header?

================================
RFC3261 26.2.2 SIPS URI Scheme

      Note that in the SIPS URI scheme, transport is independent of TLS,
      and thus "sips:[email protected];transport=tcp" and
      "sips:[email protected];transport=sctp" are both valid (although
      note that UDP is not a valid transport for SIPS).  The use of
      "transport=tls" has consequently been deprecated, partly because
      it was specific to a single hop of the request.  This is a change
      since RFC 2543.
================================

Thanks

Lee, Sungwoo

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