Tone Signaling Feature (Keystone Concept)

Tone Signaling provides a Project 25-compatible variant of (analog) Quik-Call II decoding functionality, designed to operate on ASTRO Conventional and ASTRO 25 Trunking digital networks. As with Quik-Call II, Tone Signaling is commonly used in the Fire Service Industry to selectively alert first responders to an incident by broadcasting a series of distinct, recognizable tones followed by a voice transmission from dispatch. This allows an entire fire department to be simultaneously alerted to an emergency situation, as opposed to unit-to-unit dispatch. There is also a provision to allow radio-users to keep their radios in a muted mode until a specific tone or tone pair has been decoded by the radio. Following the alert, the dispatcher can transmit their dispatch information to the radio group.

1.	Define one or more Tone Signaling Lists: Settings on the Tone Signaling List determine the specific tone frequencies that unmute the radio and / or sound an alert tone whenever the radio decodes matching tone(s) broadcast from the dispatch console. Both singletone and two-tone entries are possible, as is controlling an external device (through a VIP Output connection) whenever valid tones are decoded. See Tone List Alias See Tone1 Freq See Tone2 Freq See Unmute Enable See Alert Tone See External Control
2.	For ASTRO 25 Trunking - channels, individual Tone Signaling Lists are then selectable for Trunking from the Digital Tone Signaling List field; the In-Call User Alert Enable field must be "Enabled" in order to stay muted. For ASTRO Conventional - channels, individual Tone Signaling Lists are then selectable for Conventional from the Tone Signaling List field; the In-Call User Alert Enable field must be "Enabled" in order to stay muted.
3.	For External Control, the corresponding VIP Output(s) must be set to an "Aux Control" (See Aux Control 1-3).
4.	The Voice Mute button-press or Voice Mute menu-selection allows the radio-user to toggle on and off the Voice Mute functionality on In-Call User Alert-enabled channels.

The Tone Signaling Feature

(Learning and Programming Radio Features)