Arts (Auto Range Transpond System); Dtmf Paging System - Vertex Standard VX-4200 Series Operating Manual

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ARTS (Auto Range Transpond System)

This system is designed to inform you when you and another ARTS-equipped station
are within communication range.
During ARTS operation, when the radio receives an incoming ARTS signal, a short
beep will sound, and "In" ("In Service") will be displayed on the sub-LCD. If you
move out of range for more than two minutes, your radio senses that no signal has
been received; a short triple-beep will sound, and "Out" ("Out of Service") will be
displayed on the Sub-LCD. If you subsequently move back into communication range,
as soon as the other station transmits, a short beep will sound and "In" will be dis-
played again on the Sub-LCD.

DTMF Paging System

This system allows paging and selective calling, using DTMF tone sequences.
When your radio is paged by a station bearing a tone sequence which matches yours,
your radio's squelch will open and the alert will sound. The three-digit code of the
station which paged you will be displayed on your radio's LCD.
VX-4200 S O M 15