On Fri, Oct 28, 2022 at 6:28 PM David Cunningham <dcunning...@voisonics.com> wrote:
> Hello, > > We have a problem where Asterisk is resetting the CSeq on a re-INVITE, and > the phone receiving the re-INVITE is rejecting it, probably as a result of > that. Would anyone be able to offer any insight please? > > The scenario is: > > Phone A makes call 1 to Asterisk which dials call 2 to phone B, which > answers the call. > > Phone B puts call 1 on hold, makes call 3 to Asterisk which dials call 4 > to phone C, which answers the call. > > Phone B does an attended REFER transfer of call 2 to call 3, taking itself > out of the call. Asterisk bridges the remaining calls, so phones A and C > are now talking to each other. > > Asterisk sends a re-INVITE to phone A with a P-Asserted-Identity, to tell > phone A the updated details of phone C that it's talking to. However phone > A rejects the re-INVITE with a "404 Not found" error. > > The only explanation I can see for the "404 Not found" error is that call > 1 was set up with "CSeq: 954698786 INVITE", whereas the re-INVITE Asterisk > sends with the P-Asserted-Identity has "CSeq: 102 INVITE". Why is Asterisk > resetting the CSeq on the re-INVITE, and doesn't this appear to be > incorrect? > It's not incorrect. Each direction has its own CSeq[1]. From Phone A to Asterisk can be 954698786 and from Asterisk to Phone A can be 102. [1] https://www.rfc-editor.org/rfc/rfc3261#section-12.2.1.1 -- Joshua C. Colp Asterisk Project Lead Sangoma Technologies Check us out at www.sangoma.com and www.asterisk.org
-- _____________________________________________________________________ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- Check out the new Asterisk community forum at: https://community.asterisk.org/ New to Asterisk? Start here: https://wiki.asterisk.org/wiki/display/AST/Getting+Started asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
