From: "Stephen Paterson" <[EMAIL PROTECTED]>

   Is it valid for a REGISTER request to contain a port parameter?
   e.g.  REGISTER sip:example.com:4060

The request-URI should be the hostport part of the address of record
to which you are registering the contact.  In almost all cases, the
address of record does *not* have a port part.  (In general, a URI
with a port is not the same as the URI without the port, even if the
port is 5060.)

But in some cases, the hostport should have a port part.  For
instance, on my test system, I've run 4 simultaneous copies of the
sipX proxy/router, each listening on a separate port.  So the AORs for
the four systems are:

        sip:[EMAIL PROTECTED]:5060
        sip:[EMAIL PROTECTED]:15060
        sip:[EMAIL PROTECTED]:25060
        sip:[EMAIL PROTECTED]:35060

In that case, the request-URI of the REGISTER needs to contain the
proper port number.

Dale
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