3 year old system, Simon XT, never had any previous connection problem, no recent changes.
Panel having trouble connecting to the GSM network both from Alarm.com phone app,and on home computer. Notification: Panel-not responding (i.e. Alarm.com cannot communicate with panel, nor recognize or change alarm status)
The ATT cellular network is fine, my phone confirms that. (Though phone is 3g, ADC is 2g)
The radio signal strength on panel is dropping in and out intermittantly: sometimes zero, sometimes 14 (high) every few minutes.
When I test signal strength on Simon XT panel it says:
Registering … Idle (when signal strength 14 bars (high))
or it says
GSM frequency not available (when signal strength 0)
Radio registering updating (signal strength 0)
Everything on the panel is functioning fine otherwise. Comm test stays at “GSM comm test in progress…” with no change. I have not been able to try comm test with signal at 14 yet, it seems like it’s at 0 most of the time, and 14 some of the time. I have tried disconnecting power and battery to reset, it seems to sometimes bring the signal back to 14 for a short time, but not always.
There are status lights on the back of the radio module.
The notification/warning light L1 is blinking 3 times when signal is good (14)
The notification/warning light L1 is blinking 6 times then 3 times when signal is 0.
The signal strength indicator light L4 is blinking 3 times when signal is good (3x is fine and good enough), and none when signal is 0.
From Simon XT manual:
Light Blinking 3 x: The module is trying to register on the GSM network. If it
persists for more than a few minutes, the module is
having problems registering with the GSM network. Check
L4 for signal level.(L4 signal level indicator is at 3 flashes-good, and 0 flashes when signal drops) If the signal is good, the module may be roaming
on a GSM network that does not partner with our GSM
Light blinking 6 x: This is an error only if it persists for more than a minute. (Yes, it’s persisting when signal level is 0, and stops when signal level is 14)
Otherwise, it’s just an indication that the module is fixing
an unusual condition regarding communication with the
Any suggestions? Thanks!