The IPGSM-DP Commercial Fire Communicator is used to upgrade a commercial fire system that previously reported to the Central Station by phone lines (POTS), to a system that uses an Internet or GSM cellular reporting path. The IPGSM-DP communicates via the AlarmNet relay point and has Dual Primary methods of operation. In method one, the unit communicates over the internet as primary and utilizes GSM cellular as a backup, should the internet be unavailable. In method two, the unit communicates via GSM cellular, so no communications cabling is needed. The communications method (IP/GSM or GSM only) is field selectable and easily set up. The unit answers any phone number dialed so Fire Panel programming changes are at a minimum when converting existing systems over to this communications method.