Hello,

usually, you have a in the To header an URI, and this can of course contain a 
port:

SIP-URI          =  "sip:" [ userinfo ] hostport
                    uri-parameters [ headers ]
SIPS-URI         =  "sips:" [ userinfo ] hostport
                    uri-parameters [ headers ]

For more information refer to e.g. section 25 of RFC 3261.

Cheers,

Henning

-----Original Message-----
From: Olivier <[email protected]> 
Sent: Tuesday, January 24, 2023 8:22 AM
To: [email protected]
Subject: [SR-Users] [SR-Users]: Port number in To: field

Hello,

While trunking with an Oracle SBC, I was lately required to include a port 
number in INVITE To: field.

Would you qualify this as a "legal requirement" (according to SIP Standards) ?

Best regards
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