User's Manual
Table Of Contents
- ASTRO® XTL™ 5000 Mobile Radio with W4, W5, W7, and W9 Control Heads User's Guide
- Front Cover
- W4 Quick Reference Card
- W5 Quick Reference Card
- Control Head Front Foldout
- Inside Title Page
- Contents
- Introduction
- Basic Operating Procedures
- General Radio Features
- Often-used Features
- Emergency Call and Alarm
- Scan Operation
- Turn On Scan
- Turn Scan On While Disregarding the Squelch Code (Conventional Modes Only)
- View a Scan List
- Transmit While Scan Is On
- Temporarily Delete a Nuisance Mode With Scan On (W7 and W9 Control Heads Only)
- Restore a Nuisance Mode (W7 and W9 Control Heads Only)
- Change Mode Priorities While Scan Is On (W7 and W9 Control Heads Only)
- Restore Mode Priorities in a Scan List (W7 and W9 Control Heads Only)
- Program a Scan List
- Hang Up Box (HUB)
- Optional External Alarms (Horn and Lights)
- Time-Out Timer
- Push-To-Talk Identification (PTT-ID)
- Conventional Radio Features
- Trunking Operation
- Features Used on Trunking Systems
- Telephone Interconnect List
- Unlimited Telephone Interconnect (W7 and W9 Control Heads Only)
- Enhanced Private Conversation (Digital Modes Only)
- Call Alert Page (Digital Modes Only)
- Failsoft
- Dynamic Regrouping (Digital Modes Only)
- SmartZone® (W7 and W9 Control Heads Only)
- Out-of-Range Indication
- Trunked Announcement
- Secure Operation
- Troubleshooting
- Glossary
- Index
- Control Head Back Foldout
- W7 Quick Reference Card
- W9 Quick Reference Card
- Back Cover
82
Trunking Operation
Trunked Announcement
The announcement capability allows a user to make announcements
to the entire user group, as well as monitor talkgroup calls and other
announcements.
Announcement calls are handled in two different ways, depending on
the trunked central controller configuration. The two types are called
ruthless and non-ruthless preemption.
• Ruthless Preemption: When a ruthless preemption
announcement call is initiated, the requesting radio begins
transmitting immediately. All associated talkgroup calls taking
place on other channels are immediately halted, and the radios
are steered to the announcement call.
Transmitting radios continue to transmit until the PTT button is
released, at which time they also unmute for the announcement
call. Individual calls (Private Conversation and telephone
interconnect) are not affected.
• Non-Ruthless Preemption: When a non-ruthless preemption
announcement is initiated, the initiating unit receives a telephone-
type busy tone, followed by a call back when all associated
talkgroup conversations end.
Once an announcement call is pending, any attempts by other
users to initiate a talkgroup call will result in a telephone-type busy
tone. These users will not receive a call back until the
announcement call is complete.