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GPS / GLONASS Speaker Mic with Tactical Level Frequency Domain Scrambler for Portable & Mobile Radios

GPS-GLONASS Speaker Mic w/ Frequency Domain Voice Scrambler

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


Midian's VS-1200-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-1200-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 high-level frequency domain voice scrambling built into the VS-1200-SM1G protects conversations against the most determined listeners. The VS-1200-SM1G supports the selection of up to three different codes from approximately 4 billion codes. Each code can be programmed for one of four security levels.


  • Billions of possible programmable Security Keys
  • 3 user-selectable Symmetric Security Keys
  • 4 user programmable security levels
  • Tactical level high security voice scrambler using Digital Signal Processing (DSP) technology
  • Analog audio is digitized and a proprietary method of scrambling using Fast Fourier Tranform (FFT) is applied
  • Automatic scramble/clear mode when using Midian's FMP-1200™ protocol or pilot tone
  • Excellent recovered audio quality & speaker recognition
  • Does not require synchronization - works well in satellite voting systems
  • Can be used in most HF/VHF/UHF radios with FM or conventional AM modulation
  • No monthly subscriber fees when using Google Earth or Terrain Navigator Pro with our GPS products
  • 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
  • Programmable periodic GPS or GLONASS auto-reporting PTT
  • Available ANI formats include Midian's FMP-1200™, Motorola's MDC-1200®, Kenwood's FleetSync®, Harris' G-Star™, DTMF & 5-Tone
  • Emergency ANI automatically activated by Man-Down - Lone Worker sensor
  • Emergency ANI using a side button
  • After Emergency ANI the microphone's speaker can sound emergency locator tones to aid rescuers in locating users in distress
  • Programmable via Midian's KL-4F Programmer and KL-4F-PC1 or the H250-PROG
  • Programmable audio levels
  • Easy to install speaker microphone configuration
  • Pre-made cables available for many radios
  • 3 year warranty


GPS / 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-1200-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.