Hi, in case a proxy/UAS receives:

  INVITE sip:u...@domain;transport=UDP;transport=TCP SIP/2.0

what should it do?

a) set transport=UDP
b) set transport=TCP
c) discard the message as invalid (error 400)

Note that, even if c) is the most ellegant choice, it would involve too much 
work by comparing each pname with others (imagine lots of parameters).

PD: The same question for header parameters.

Thanks.

-- 
Iñaki Baz Castillo

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