Can Jabber show which line is ringing?
Have a client that has two lines in Jabber and the banner that shows up just shows the number or internal caller and not what line is ringing.
They are using Jabber as a soft-phone only (CSF Device).
Cisco Unified CM Administration System version: 22.214.171.12400-18
Cisco Unified CM IM and Presence Administration System version: 126.96.36.19910-12
Not sure about your versions but what jabber version are you running. I would see what version jabber your using and then check the release notes to see when was introduced.
You can google search and incoming call for multi line and here is one picture.
Can you upgrade your jabber version or mine through the release notes to find when this was released?
That would be my next step for you to try.