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1200 Baud Radio Data Modem

1200 Baud Radio Modem (RF Modem): TDM-1


Midian's TDM-1 is used to transmit and receive computer files and messages via two-way radio. The TDM-1 employs a 1200 baud modem for point to point or point to multi-point communications. It offers automatic push-to-talk with a programmable key-up delay, busy channel lockout and hang time.


  • 1200 baud data rate
  • Automatic push-to-talk
  • Cable can be adapted to most any radio
  • Carrier/CTCSS busy detect input
  • Easy to install & operate
  • Point to point or point to multi-point communications
  • Simplex operation
  • 3 year warranty


Transmit and receive data for mobile data terminals, credit card swipers, reprogram electronic street signs, and more.


Connects to a PC using a DB-25 connector and to the two-way radio from an RJ-11 cable which can be adapted to many radios.

Product Manuals

TDM-1 Product Manual