[SIPForum-discussion] about the rfc3265

[Raj]

Hello francy,
   
               Call leg informations are From, To and Call ID. When you have got the response has 481, then it means that the call leg information does not exist. So the new subscription reuqest has to sent with new call leg informations, in order to receive notification for the required subscription.
   
  with regards
  Raj.

francy at accel.net.cn wrote:
        Hi everyone:
  in the specification of rfc3265, there is a paragraph:
     if a SUBSCRIBE request to refresh a subscription receives a "481"
     response, this indicates that the subscription has been terminated
  and that the subscriber did not receive notification of this fact.
     In this case, the subscriber should consider the subscription
     invalid.  If the subscriber wishes to re-subscribe to the state, he
     does so by composing an unrelated initial SUBSCRIBE request with a
     freshly-generated Call-ID and a new, unique "From" tag.
  could anyone tell me how to composing an unrelated initial SUBSCRIBE request.
  I hope to get everyone help and suggestion.
  Thanks in advance.
   
  Francy He
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