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GPS / GLONASS Speaker Microphone with Double Inversion Scrambler for Mobile & Portable Two-Way Radios

GLONASS-GPS Speaker Mic with Double Inversion Scrambler

To Order Call:
1-800-MIDIANS (643-4267) or 520-884-7981


Midian's VS-1150-SM1G is a GPS / GLONASS speaker microphone that can connect to most conventional analog and trunked portable two-way radios. When the GPS / GLONASS speaker microphone is keyed it will send the PTT ID (ANI) and the GPS / GLONASS coordinates. The unit also supports sending of an Emergency ID with Location when activated by a button press, the Lone Worker feature or the Man-Down feature. Midian's CAD-800 base station controller decodes and displays the PTT ID along with the GPS / GLONASS location and other selectable information shown on a map using Google Earth or Terrain Navigator Pro with no monthly subscriber fees.

The VS-1150-SM1G also supports decode functions such as Polling, Selective Calling, Radio Disable, Radio Enable, Spy (Remote Monitoring) and Emergency Acknowledge. These decode functions are initiated from Midian's CAD-800. Polling allows the dispatcher to request a unit's GPS / GLONASS location. Selective calling can be to call an individual unit, a group of units or all units. If a unit becomes lost or stolen, it can be disabled, so it cannot interfere with the system. If the unit is later recovered the unit can be re-enabled. The Spy function enables the dispatcher to eavesdrop on a unit during an emergency or other condition. If multiple Emergency IDs are transmitted, the dispatcher can stop subsequent Emergency ID transmissions using the Emergency Acknowledge feature.

The double inversion scrambling built into the VS-1150-SM1G protects conversations against casual listeners. The VS-1150-SM1G supports the selection of up to four different double inversion split points from a list or 32 different double inversion split points.


  • No monthly subscriber fees when using Google Earth or Terrain Navigator Pro with our GPS products
  • Over the air data encrypted with a unique System ID using Midian's 1200 baud Fleet Management Protocol, FMP-1200™
  • GPS or GLONASS latitude, longitude, speed, bearing, time and PTT ID transmitted on leading and/or trailing PTT
  • GPS or GLONASS Location sent with PTT ID, Emergency ID & in response to Polling when used with our CAD-800 Dispatch Display
  • Option available for automatic emergency ID activation by Man Down - Lone Worker sensor
  • Programmable via Midian's KL-4F Programmer and KL-4F-PC1 or the H250-PROG
  • Scramble/clear mode is selectable
  • Unit mutes speaker during incoming Midian FMP-1200™ data packets
  • User-programmable for any of the 32 double inversion codes
  • Programmable periodic GPS or GLONASS auto-reporting PTT
  • Fast data packets with forward error correction for high reliability & security
  • 3 year warranty


GPS speaker microphones / GLONASS speaker microphones are a useful tool for keeping track of personnel's location, users in distress and lost or stolen radios. Common users of GPS-GLONASS speaker microphones include Military, Public Safety (Police, Fire, etc.), Search & Rescue, Industrial workers for Lone Worker features and more. The addition of voice security enables users to keep eavesdroppers from listening in on conversations.


Midian's VS-1150-SM1G is available with many pre-made cables for portable and mobile radios including Bendix King, Icom, Kenwood, Motorola, Motorola APX series APCO P25, and Vertex. Click for a list of supported radios.