See RFC 4028. > -----Original Message----- > From: ikuzar RABE [mailto:ikuzar9...@gmail.com] > Sent: Wednesday, June 26, 2013 5:27 AM > To: sip-implementors@lists.cs.columbia.edu > Subject: [Sip-implementors] SIP messages exchange to maintain a session > > Hi all, > > I'd like to know if there are SIP messages exchange to maintain the > session > between two UA (message such as "Hello, I'am still here" / "Hello, I'am > still here too" while RTP conversation is established and lasts a > longtime. > > The context: > I have to differentiate an INVITE with a BYE which arrives one hour > after > an INVITE (so a conversation that lasts one hour) and an INVITE with no > BYE > ... (packet lost or another problem ...)
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