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Mobile Train Radio Communication

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Mobile Train Radio Communication

Postby Prasanth » Sun Jan 01, 2012 5:40 pm

MPT1327 is an Open Standard for Analog trunked radio networks. The British Department of Trade and Industry (DTI) developed it in year 1988. In the course of the next twelve months of development continued and resulted in MPT1343 standards. A system based on MPT1327 generally comprises of several radio channels. At least one of these channels will have been defined as the CC (Control Channel) and all the other channels are TCs (Traffic Channel). Data messages between the mobiles and the networks are exchanged on the Control Channel at 1200 bits/sec using FSK (Frequency Shift Keying). Each subscriber in a trunked radio network has a unique call number. It consists of a prefix (3 digits), a fleet number (4 digits), and a subscriber 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 the call a subscriber is exclusively allocated a traffic channel from the available trunk.

The System (T1540) Overview

The system consists of a number of radio sites, which are linked in groups to “Regional Nodes” (in the Western Railway System there are two radio sites, one at MX, and the other at BVI). Regional Nodes may be linked together to form a wide area network. Radio sites (base stations) are connected by fixed audio and data links (V.24 interface at 1200 bauds) in “Star Configuration around the Regional Node”.

In case of wide area network the interconnection between the Regional Nodes shall be with X.25/TCP IP (9600-baud link) for data, and by an audio network consisting of fixed link bearers for audio signals. PSTN & PABX interconnection is provided at the Regional Node now.

The expansion capability of the T1540 system is as under.
Ø Each Regional Node can support upto 16 base stations connected in a star configuration.
Ø Each base station can support upto 24 channels including the control channel (both the base stations of W.R are configured for only 5 channels each).
Ø Overall System can be configured for a maximum of 32 Regional Nodes.
The overall access for management of the system is provided by the Network Provider Interface (NPI). The NPI provides an interface for external systems running applications (a Network Provider Package (NPP)) using the following facility.
Ø Statistic
Ø System Configuration
Ø Validation
Ø Monitoring
Ø Fault Management and Alarms
Ø Call Records
Ø NPI management
Frequency of operation of the Western Railway System is between 338 to 350 MHz.
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Re: Mobile Train Radio Communication

Postby priya harini » Tue Jan 03, 2012 1:48 pm

thanks for the full report sir....could you please give me the ppt for this topic sir?
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Re: Mobile Train Radio Communication

Postby Prasanth » Tue Jan 03, 2012 5:42 pm

There is no PPT
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Re: Mobile Train Radio Communication

Postby gunjan kumar » Thu Feb 23, 2012 10:12 pm

priya harini wrote:thanks for the full report sir....could you please give me the ppt for this topic sir?
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Re: Mobile Train Radio Communication

Postby akhilpkadampanad » Sun Aug 03, 2014 2:28 am

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