Hi, Initial INVITEs do not ever have a To-tag. So, the initial INVITE didn't have a To-tag, not because of any quirk or eccentricity, but because initial INVITEs aren't supposed to have To-tags. If the initial INVITE being CANCEL'd doesn't have a To-tag, the CANCEL shouldn't have a To-tag. The CANCEL should not have a To-tag.
I suspect your theory of why the CANCEL is being rejected by the Cisco phone is not correct. -- Alex > On Nov 24, 2024, at 10:42 pm, nz deals <nzdealsh...@gmail.com> wrote: > > Does anyone have any thoughts or input on this? > > Thanks > > Regards, > Jason > > On Mon, 18 Nov 2024 at 10:20, nz deals <nzdealsh...@gmail.com> wrote: > Hi Community > I’m encountering a strange issue with CANCEL requests in my opensips 3.4.2 > setup. Here’s the scenario: > • My carrier sends the initial INVITE without a tag in the To header, > which I forward to a Cisco phone. > • The Cisco phone responds with a 180 Ringing message, which includes a > tag in the To header. > • When I send a CANCEL request, my carrier does not include the tag in > the To header, and as a result, OpenSIPS also forwards the CANCEL to the > Cisco phone without the tag. > Because of this, the Cisco phone responds with a 481 Call/Transaction Does > Not Exist error, and the call remains active on the phone without being > canceled. > I’ve tried modifying the CANCEL request to include the tag in the To header, > but I wasn’t able to modify because the initial INVITE doesn’t have a tag in > the To header. > Has anyone experienced a similar issue or found a way to fix this? Any > guidance would be greatly appreciated. > > Thanks > > Regards, > Jason > _______________________________________________ > Users mailing list > Users@lists.opensips.org > http://lists.opensips.org/cgi-bin/mailman/listinfo/users -- Alex Balashov Principal Consultant Evariste Systems LLC Web: https://evaristesys.com Tel: +1-706-510-6800 _______________________________________________ Users mailing list Users@lists.opensips.org http://lists.opensips.org/cgi-bin/mailman/listinfo/users
