We have a CM 5.1.1
The SDBLF on a 7914 exp.mod. or a 79xx phone the red light does not light when the phone goes off hook, but you can press the SDBLF and call the phone. Any ideas?
Check the presence group and the SUBSCRIBE CSS from the device that should be able to monitor the lines.
They should be in the same presence group and the SUBSCRIBE CSS is like a regular CSS, if you can reach it, you can monitor it.
if this helps, please rate
The Subscribe CSS was the culprit, thankyou for the help!!