[SIPForum-discussion] Ringing / Session Progress (180/183)

[Ramesh Chauhan]

Hi,
   
  Can you please tell me the diference between Ringing(180) and Session progress(183).
   
  As per me, if we recieve Session Progress(183), then our media will start flowing from farend to us and from us to farend. and if we receive Ringing(180) then our device will generate his own ring on the phone.
  Eg:
  Session Progress(183):
  Callee                          SIPProxy                          Caller
        ----------Invite--------------->
                                             ----------Invite--------------->
                                             <--------Trying--------------
        <--------Trying--------------  
                                             <--SessioProgress(183)-
        <--SessioProgress(183)-
        --------Here we will receive RTP from-------------------
   
  Ringing (180):
  Session Progress(183):
  Callee                          SIPProxy                          Caller
        ----------Invite--------------->
                                             ----------Invite--------------->
                                             <--------Trying--------------
        <--------Trying--------------  
                                             <--ringing(183)------------
        <--ringing(183)------------
        --------Here our device will generate local ring-----------
   
  Am I correct ???????????/
   
   
  Regards
  Chauhan

       
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