Special Features:

Radio frequency modem used for communication through monaco fire system; hard wire option; rfm-xhr receives and decodes radio messages from building transceivers and passes the communication over a cable to the d-21 central receiving system; frequency: 138.9250; input: 120 vac, 50/60 hz, 1.75a, 40w; output: plus 13.8 vdc, factory set; fuses: 6.3a, 250v type t fuse; temperature: 32-120 degree f (0-49 degree c); relative humidity: 10-90 percent, noncondensing; black enclosure

Properties:

An item which modulates and demodulates one or more electrical signals. It connects data terminal equipment to a communication line or network such as telephone, radio or telegraph. It may include the multiplexing and demultiplexing circuits, circuit amplifiers and source(s) of carrier frequency. For items designed for light signals, see modem, fiber optic.