[SOLVED] Wobbly extension?

Hey forum
I must have an extension that is going up and down faster than a bride’s nightie.
See picture below, taken when there’s NO active calls.

How can I locate the culprit unreliable extension ?
I started searching logs, and need to continue.

TIA’s for any tips or clues.

Try under either your log files or under reports, asterisk info, registry’s or peers to see if you can notice the one going offline.

Reboot appears to have solved the problem.
Billy Gates taught a generation of users the benefits of a three finger salute.
Freepbx graph of online users is now flatlining as expected.
Cheers to all who helped.