I only know the hkc GSM option that is 4g and WiFi combined
Plus the paths are then monitored separately. Polling rates are the thing to consider here. Just cos WiFi is available or 4g signal etc doesn't mean the alarm can transmit data. Proper pro systems poll at regular intervals. Ie grade 4 comms every 30 seconds grade 2 comms every 24 hours.
The faster the poll rate the quicker a failure is reported. Plus if a GSM jammer and line cut is performed the quicker an alarm can be generated.