Hi Elison, The absence of an Allow header field MUST NOT be interpreted to mean that the UA sending the message supports no methods. Rather, it implies that the UA is not providing any information on what methods it supports.
Refer RFC-3261 section: 20.5 Thanks, Alok Tiwari Aricent -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Elison Niven Sent: Tuesday, February 09, 2010 12:51 PM To: [email protected] Subject: [Sip-implementors] Check Allow header before sending INFO message? Hi, Should a UA check that the INFO message is listed in the Allow header of the remote UA before sending a SIP INFO message to the remote UA? Also, What should the UA assume about the remote UA's capabilities of receiving the INFO message if the Allow header is absent? Best Regards, Elison _______________________________________________ Sip-implementors mailing list [email protected] https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors "DISCLAIMER: This message is proprietary to Aricent and is intended solely for the use of the individual to whom it is addressed. It may contain privileged or confidential information and should not be circulated or used for any purpose other than for what it is intended. If you have received this message in error, please notify the originator immediately. If you are not the intended recipient, you are notified that you are strictly prohibited from using, copying, altering, or disclosing the contents of this message. Aricent accepts no responsibility for loss or damage arising from the use of the information transmitted by this email including damage from virus." _______________________________________________ Sip-implementors mailing list [email protected] https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors
