Hello,
When a UAC requests to expire a contact binding from a registrar
immediately, I have seen both of these formulations:
REGISTER sip:domain SIP/2.0
...
To: <sip:aor>
...
Contact: <sip:user@nlri>;expires=0
and:
REGISTER sip:domain SIP/2.0
...
To: <sip:aor>
...
Contact: <sip:user@nlri>
Expires: 0
Which is correct? Are they both admissible?
Thanks,
--
Alex Balashov - Principal
Evariste Systems LLC
235 E Ponce de Leon Ave
Suite 106
Decatur, GA 30030
United States
Tel: +1-678-954-0670
Web: http://www.evaristesys.com/, http://www.alexbalashov.com/
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