Reference · Codes & Standards
Digital Alarm Communicator TransmitterDACT
The dialer that sends alarm, supervisory and trouble signals to the supervising station over phone lines or, increasingly, cellular/IP communicators. Must test its path at least every 6 hours (24 h for some arrangements).
NFPA 72: 26.6.3
Section numbers vary by edition — confirm in the edition your AHJ has adopted.