Hi,
sure. That's why it's called "transaction oriented". On a SIP-Theory basis, the second INVITE opens a new transaction!! For correlation the Call-ID keeps the same! This is how all of the big carriers I know handle OverlapDialing.
The problem is: * I am receiving an INVITE. * At this point I don't know if there will be a second INVITE or not. So I have to wait. * If the timer elapses, ok handle this INVITE. * But if there IS a second (third..) INVITE, I have to cancel the first and then handle the second.
Sounds like nobody has done this before... any suggetions appriciated.
greetz
Am 04.02.2014 15:56, schrieb Alex Balashov:
Indeed, Section 3.1 in the referenced RFC covers this pretty well.
On 4 February 2014 09:47:38 GMT-05:00, "Olle E. Johansson" oej@edvina.net wrote:
On 04 Feb 2014, at 15:43, Moritz Graf <moritz.graf@g-fit.de> wrote: Shortly explained what RFC3578 is: In a open numbering plan you never know if the INVITE you received is already complete, or if there are more numbers coming in. One way of accomplishing this is to set up a timer. If the timer elapses you assume the number is complete. If not, you are receiving a new INVITE with one digit more. Now you have to close the old transaction with a "484 - Address Incomplete"-response and start the timer again. (Find the algorithm I want to implement attached) You are not allowed to have two open INVITEs, the second one SHOULD get a 491 response. The client should not send a new INVITE if the old INVITE transaction is not complete. I don't th ink overlap dialing in SIP was ever meant to be timer based. Consider that the first INVITE can go to a different proxy than the second. There's no dialog, no route set. /O ------------------------------------------------------------------------ SIP Express Router (SER) and Kamailio (OpenSER) - sr-users mailing list sr-users@lists.sip-router.org http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-users-- Sent from my Nexus 10, with all the figments of autocorrect that might imply.
Alex Balashov - Principal Evariste Systems LLC 235 E Ponce de Leon Ave Suite 106 Decatur, GA 30030 United States Tel: +1-678-954-0670 Web: http://www.evaristesys.com/, http://www.alexbalashov.com/