[SIPForum-discussion] Response for REFER

[siduanfeng]

Please delete my mailbox from the mailing list, thanks.

BTW, many thanks for the information form everybody.

Best regards,

Delphi
  ----- Original Message ----- 
  From: Zhu Liang 
  To: discussion at sipforum.org 
  Sent: Tuesday, August 09, 2005 8:47 PM
  Subject: [SIPForum-discussion] Response for REFER


  Hi all, 
  I have some confusion about SIP REFER, if a UA receives an 200 OK instead of 202 Accepted for his REFER message, is it correct? I read a little RFC3515 
  in 2.4.2 it says :

   If no final response has been generated according to the rules above,
   the UA MUST return a 202 Accepted response before the REFER
   transaction expires.

It seems that it MUST send the 202 Accepted.

  But the following paragragh says:


   If a REFER request is accepted (that is, a 2xx class response is
   returned), the recipient MUST create a subscription and send
   notifications of the status of the refer as described in Section
   2.4.4.Here the 2xx class seems to mean that it is also acceptable for a 200 OK message.

  Would anyone tell me 200 OK message for REFER is acceptable and if not how would the UA do for it?





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