Product Overview	System Overview	System Overview Application Note

The World's Most Popular VHF/UHF Radio Trunking Protocol

• Proprietary digital signalling prevents unauthorized mobile users

• Supports PTT (Push-to-Talk) dispatch, private calling, radiotelephone, and conventional operation

• Operates in environments with co-channel users

• May be installed in parallel with a conventional repeater system

• Up to 16 trunked channels per system

• Over 4,000 ID's for group or individual calling

• Remote "Radio Kill" to disable illegal or non-paying customers

• Store and forward dialling, just like cellular phones

• Last number re-dial; Automatic 10 number speed-dial

• Affordable alternative to cellular, PCS, and other radio trunking formats (Smartnet, LTR, MPT, etc.)

A World Standard Trunking System

The SmarTrunk II Digital Trunking System is designed to provide sophisticated trunking and telephone interconnect features using low cost two-way radio equipment at frequencies below 800 MHz. First introduced in 1994, the SmarTrunk II trunking protocol is now offered by most of the world's leading radio manufacturers, including Alinco, Icom, Kenwood, Motorola, Standard, and Yaesu / Vertex. There are now over 5,000 SmarTrunk II systems operating in over 90 countries worldwide.

The proprietary SmarTrunk II trunking protocol provides automatic channel acquisition and call privacy for systems of up to 16 channels and 4,000 subscribers. Many types of calls are supported, including mobile to landline, mobile to mobile, landline to mobile, group calling, emergency calls, as well as conventional operation. Best of all is the relatively low cost of both the base and mobile radio equipment, making SmarTrunk II the system of choice for trunking applications below 800 MHz.

The SmarTrunk II Controller

The heart of the SmarTrunk II System is the Digital Trunking Controller which performs all the signalling and trunking functions, including subscriber validation and call record accounting. The controller can be connected to any full duplex base station or repeater (one controller per channel), and may also be installed in parallel with a conventional tone panel.

For systems offering telephone interconnect, the ST-853 provides the interface between the base radio and the telephone system or PABX, making SmarTrunk II an ideal solution for in-plant paging systems.

Features

• Capacity for over 4,000 subscribers per system.

• Over 300,000 paging codes available.

• Over 4,000 call accounting records per channel.

• Two subscriber telephone line inputs.

• Proprietary signalling protocol highly immune to hackers and pirates.

• User friendly PC programming, locally or remotely via modem.

• Single access point for programming and system management.

• Serial databus linking all controllers at a single site.

• Multi-level password scheme for control of system access.

• Versatile array of telephone interconnect features.

• Priority and emergency call override feature.

• Compatible with most radio stations and repeaters.

What Can It Do?

A versatile design provides wide variety of communication options

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