Featured in the August 2014 edition of RadCom - the magazine of the Radio Society of Great Britain
SoftTSC is an implementation of an MPT1327 Trunking System Controller (TSC).
It implements a basic TSC which operates on a single channel and will connect voice calls between radio units (RU).
It works by using your computer's sound card to send and receive, in real time, the FFSK control signals required to control the RU's on the system.
Setting up this system requires some knowledge of MPT1327 systems. The best reference for this is the MPT1327 specification which is available for download, free, from the UK OFCOM website.
Here you can download a software implementation of a basic MPT1327 trunking system controller.
You will need a Linux installation to use this software; this software does not yet run on Windows. The instructions in the README show how to get this software running on Fedora 20. If you have a different Linux distribution you'll need to adjust these instructions to suit.
A big part of this project was gaining an understanding of all the settings an MPT1327 radio uses. The basic settings are listed here.
Hi Paul, A really interesting project. Great article in Radcom. I set up a lot of MPT1327 systems in the 1990's using Fylde Microsystems controllers and TSCs and have collected a few radios, this has spurred me into re-kindling the interest in these systems and experimenting on the amateur bands. I used to use a Marconi 2955 with a Trunked adapter for testing. I have a 2955 but sadly no trunking adapter - must keep an eye out for one, really useful! Great job, thanks Andy