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MPT-1327

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Revision as of 15:18, 7 February 2005 by Ericcarlson (talk | contribs)

Overview

MPT 1327 is a industry standard for trunked radio communications networks. It was developed in 1988 by the British Department of Trade and Industry (DTI), and is primarily used in the United Kingdom, Europe, South Africa, and Australia.

Systems based on MPT 1327 generally consist of several radio channels. At least one of these channels is defined as the control channel (CC) and all other channels are traffic channels (TCs). Data messages between mobiles and the network are exchanged on the control channel at 1200 bits per second. Each subscriber in an MPT-1327 trunked radio network has a unique call number. It consists of a prefix (3 digits), the fleet number (4 digits) and the subscriber’s call number within the fleet (2 or 3 digits). After it has been entered the call number will be converted in the mobile to a 20-bit address.

For the duration of his call a subscriber is exclusively allocated a traffic channel from the available trunk.

The different types of communications on an MPT-1327 network and their definitions:

Traffic types:

  • Mobile-mobile in a cell
  • Mobile-mobile in different cells
  • Mobile-line access unit via landline or radio
  • Mobile-dispatcher station via landline or radio
  • Mobile-PABX, Mobile-PSTN

Data Communication:

  • Status messages on the CC (5-bit data length)
  • Short data messages on the CC (186-bit data length)
  • Transparent data transmission on the TC (data communication).

Calls:

  • Point to point connections
  • Group calls with talk entitlement
  • Group calls without talk entitlement