When two-way communications are critical, Vertex-Standard has a unique feature that provides a notification if in or out of range of the base or other radio users. The feature called Auto-Range Transpond System (ARTS) is available with VX-231 portables or VX-2100 mobiles and above.
ARTS Automatic Polling Range Indicator
Designed for lone-worker safety or search & rescue team accountability, the option must be programmed using radio programming software. It is basically an automatic polling system and can be set up for 25 or 55 second intervals. A short beep notifies the radio user of being in range. If out of range more than two minutes a short triple beep will be heard. When using a display radio there will also be a brief “IN RANGE” or “OUT RANGE” message on the LCD.
ARTS II Enhancement Includes Monitoring By Unit ID
The VX-450 series portables and VX-4500/4600 mobile radios have the capability of ARTS II. It uses MDC-1200 signalling to show which radios are in range. ARTS and ARTS II are not cross-compatible.