D-21, D-500 Plus Radio Alarm System Transceiver Options The D-500 Radio Alarm System communicates in DTMF-encoded VHF or UHF radio frequencies. The Monaco transceivers that will communicate with the D-500 Radio Alarm System include: BT2-3 Building Transceiver BT2-4 Interface Module BT2-R Building Transceiver Conventional M-1 Integrated Radio Transceiver and Fire Alarm Control Panel Addressable M-1 Integrated Radio Transceiver and Fire Alarm Control Panel Information on these Transceiver options can be obtained through the links provided at the bottom of this page.

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	BT2-3 Building Transceiver
	BT2-4 Building Transceiver
	BT2-R Repeater
	M-1 Integrated Radio Transceiver and Conventional Fire Alarm Control Panel
	M-1 Integrated Radio Transceiver and Addressable Fire Alarm Control Panel
	D-500 Plus Radio Alarm System Transceivers Ordering Information