GE TMX-8825 is a 25W 800 MHz GE MARC (NOT EDACS
Trunking Radio http://en.wikipedia.org/wiki/GE_Marc_V
It is also capable of 800 MHz conventional.
GE MARC trunking is obsolete, but these people still run their own network:
BTW: It's pronounced GEE-MARK - I used a GE MARC system many moons ago.
A TMX with DTMF Mic as an interconnect (telephone). Semi-duplex. Pre cell phone days.
Press * for dial tone. Press # to hang up.
Also had a dispatch talkgroup (we never called it anything but a channel).
Trunking site (tower) had to be manually selected depending on your location.
Smooth, clear and loud analog higher-power FM radio telephone thru a mobile speaker.
Beats the hell out of the bubbly digital audio and drop outs of current low powered cell phones.