Special Features:

Provides a means of automated telephone interconnect over difficult hf long-haul, fading paths; interfaces tomost standard 2-wire telephone lines of a pabx or a central office switch having standard dual-tone multi-frequency capability; automatically adjusts to noise levels on the telephone lines; works w/half-duplex radios; can select security code; rs-232 data interface and a cable with rj-11 jacks at both ends are provided

Properties:

A self-contained item or group of items, which permit the transfer of information between various types of communications support equipment and/or systems. Adjustment, monitoring, and display functions may be included. Excludes modem (as modified).