I use a different monitoring company.
No events show on the keypad or in the panel event history when this occurs. If the system is in ready status, it’s just the single tone but it reoccurs every 3 mins. If it’s armed, the tone happens once and also asks for code to be entered, then doesn’t happen again. We are also heavy users of arming and disarming via C4 and would rather not disconnect the automation. I’ve been leaving a less vulnerable zone open when we are disarmed to avoid the beeping.
So far I’ve tried resync’ing the driver to the controller and rebooting the controller to no avail. I also removed a couple c4 zones that are no longer on the panel, but have never been an issue. Rebooted again, but still have the beep.
I also use an ip2sl for C4 serial connectivity.