SmartTrunk Systems SmarTrunk II - Q. What type of signalling format does the SmarTrunk system use?; Q. What is the average connect time for SmarTrunk calls?; Q. What base station equipment is required for a SmarTrunk system?; Q. What modem do you recommend I use for my SmarTrunk system?

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System Overview

Q. What type of signalling format does the SmarTrunk system use?

SmarTrunk II is a proprietary BPSK digital signalling format which is not compatible

with any other trunking or signalling protocols. Over the air ID’s are encripted to

discourage piracy. As such, it is highly immune to “hackers” and unauthorized

system users.

Although proprietary, SmarTrunk II is available for a wide range of radio models from

ten different radio manufacturers. Therefore, unlike some other trunking formats,

you are not “locked in” to a single source for radio infrastructure or subscriber

equipment.

Q. What is the average connect time for SmarTrunk calls?

The initial connect time is typically one to two seconds, depending on the type of call

requested, the number of channels in the system, and the channel availability at the

time of request. Once a channel is acquired, it is held for the duration of the

conversation; therefore, subsequent PTT’s are instantaneous.

Q. What base station equipment is required for a SmarTrunk system?

A typical SmarTrunk channel would consist of the following items:

¨ One SmarTrunk Model ST-853 Station Controller per repeater.

¨ Any VHF of UHF radio repeater per channel - Alinco, Icom, Kenwood, Kyodo,

Motorola, Standard, Tait, Yaesu/Vertex or other suitable station repeater.

¨ Antenna system - duplexer or combiner depending on the number of SmarTrunk

channels. Coaxial cable and connectors as required.

¨ A power supply for the radio repeaters and the SmarTrunk controllers.

Each controller in the SmarTrunk system is capable of providing all system services.

There is one SmarTrunk ST-853 controller required for each repeater in the system,

up to a maximum of 16 channels per system.

Q. What modem do you recommend I use for my SmarTrunk system?

An external modem is required to remotely program the ST-853 controllers via a

phone line. We recommend either our ST-913 External Modem (which is a

complete kit of all items required). SmarTrunk does not support all makes and

models of modems. Please call the SmarTrunk factory if you have any questions.