[SIPForum-discussion] regarding_exchange_IP_ports

[mohan divakar]

Hi,
  I have a dought when a user agent can send his IP address and port in real time scenario.How both user knows each others ip and ports.
   
  For example i am calling(from sip phone) to a user who is also having sip phone.After recieng ACK from user,user sending data(RTP packets) directly to the another user,for this both the user knows the IP and ports.
   
  When i gone through some call flows in tech-invite.com i could't find when this exchange of ip and ports happen.
   
   
  Thanks in advance
  Mohan   

       
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