Are you referencing an alarm event from today 8/11?
This was a pending alarm (you can confirm this via Alarm.com activity).
“Pending Alarm” refers to a sensor with Dialer Delay enabled. This sensor was triggered while the panel was armed, but the panel was disarmed during the dialer delay period so no alarm signal was forwarded to the monitoring station.
Dialer Delay, sometimes referred to as Transmission Delay, is a delay period after an alarm is triggered by a sensor on the local system and the alarm signal being forwarded to the central station.
This is a way panel’s can help to combat false alarm response by limiting unnecessary dispatch on accidental alarms. A signal is still sent to Alarm.com but not to the central station.
Alarm.com still receives this immediately as a pending alarm signal, then awaits a disarm or time-out. If the panel is disarmed in the time period dictated by the dialer delay then the central station would not act on it.
In the future, once the alarm signal is sent to the monitoring station, If an Abort signal (disarm) is received following a burglary alarm event, which indicates one of your authorized users has disarmed the system, it will be accepted as confirmation and the alarm signal will be disregarded. You will not receive a call from operators. This would be separate from any dialer delay
More inforamtion on monitoring procedures can be found here: