RLC220 for Conventional PMR

RMIP provides "hand-off" of messages from the mobile data terminal or host computer to the radio network and positive indication of delivery progress and final outcome. All messages are given unique message identification numbers and are time-stamped for traceability through the radio system. Duplicate deliveries of messages are automatically detected and catered for

In conventional PMR mode, the RLC220 is fully compatible with the standard wide-area MDS700 mobile data systems, which allows scalable multi-hilltop applications to be rolled out using standard Thorcom system building blocks.

The RLC220 interfaces to a wide range of radios. Thorcom has successfully used radios from the following manufacturers:

	Team Simoco SRM9000 series and earlier models
	Tait TM8000 series and earlier models
	Motorola GM600 and GM1200 series and earlier models

RLC220 for MPT1327 Trunking Networks

MPT1327 trunked radio networks (sometimes called ‘Trunked PMR’ or sometimes ‘PAMR’) are well established and offer flexible, cost effective radio communications, often at a site, metropolitan or regional level. Primarily designed to offer an efficient way to share multiple voice channels, MPT1327 systems also offers data services. There are two types of short message – a straightforward ‘status message’ and a service known as ‘SDM2’ – Short Data Message Type 2 capable of transmitting about 21 bytes of data. Both these short data types are carried on the MPT1327 system control channel. For longer data transfers a dialed circuit-switched data service is available, referred to as ‘Non-prescribed data’ or ‘NPD’. The RLC220 supports all three message types, utilising its on-board analogue radio modem to implement the NPD data facility.

The RLC220 utilises a built-in secondary serial port connection with connects to the radio using the MAP27 protocol. As various different manufacturers of MPT1327 radios have implemented their interface slightly differently, please check with Thorcom for information about interfacing to your chosen MPT1327 radio. The serial port is jumper selectable to support conventional RS232 levels, inverted RS232 levels, or TTL levels.

At the centre, most MPT1327 systems use either a fixed mobile terminate, or an infrastructure equivalent to mobile terminate, which is usually presented on a conventional RS232 interface using the same MAP27 protocol used at the mobile end. If so, no special interfacing is required from Thorcom – please check for specific information from Thorcom about your system. The RLC220 has been tested and approved by Thorcom with the following MPT1327 radios using the MAP27 protocol:

	Team Simoco SRM9000 series
	Tait TM8000 series
	Motorola GM600 and GM1200 series