Long story made incredibly short:
Client has a Cisco Jabber phone system. They have ZIA and ZPA, for what information that is helpful.
When we route traffic direct and bypass ZPA the calling features of Jabber work fine. The issue is they also have a piece of functionality call CTI (Computer Technology Integration) where the user can select a desk phone from the drop down inside of the soft client and pickup the call there instead. The endpoint for CTI is a private endpoint and not externally exposed.
When we route all traffic through ZPA the CTI piece works, however as we all know the rest of the voice calling on the soft client fails.
I’ve tried breaking apart the traffic so that CTI was an internal endpoint running through ZPA and that didn’t seem to work. Any guidance that anyone could provide would be HUGE! The only thing I haven’t tried – and not sure if it would help is to use SIPA for the public endpoints of Jabber, but I can’t see at this point in the troubleshooting stage how that would help.
Anyone ever gotten CTI to work? Any help is greatly appreciated.