Category: Railway solutions



For railway operations and services the railways use different types of terminals. These various types of GSM-R terminals have to fulfill not only the GSM-R specific functions like ASCI, these terminals need to work in railway specific environment which requires high speed function, an extended temperature range, shock resistant housing, and specific Man Machine Interfaces. This chapter describes the three categories of terminals as defined by EIRENE and Morane.
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The following General Purpose Handheld (GPH) types are based on a 2 Watt standard handheld which covers the whole GSM and GSM-R frequency range and which supports the ASCI features and EIRENE functions. The GPH is used as standard mobile from non-operational staff.

Main characteristics of the GPH:

• Fully EIRENE compliant
• Compatible and tested with Nortel Infrastructure
• GSM-R frequency band
• ASCI and railway specific features
• Data transmission implemented (CSD and GPRS)
• Lightweight (<100g) with LCD graphic display



The Operational Purpose Handheld (OPH) is a GSM handheld designed for railway staff working in severe conditions. It is specially designed to withstand shocks and vibrations, as well as various temperature and humidity conditions. In particular, it is fitted with high capacity batteries suitable for low temperatures. It is also designed to be used in noisy environments (high power loudspeaker), and includes a big size and high contrast display for direct sun / night visibility.

Main Characteristics:

• Fully EIRENE compliant
• Compatible and tested with Nortel Infrastructure
• GSM-R frequency band
• ASCI and railway specific features
• Data transmission implemented
• Large screen
• Robust design (IP 54, shock resistant housing, -20 … +55°C)
• Separate push to talk and emergency call buttons



The OPS is mainly based on the OPH, but is especially designed for the Shunting application and equipped with an additional microphone, different SW and possibility to mount in a cradle.

Main characteristics:

• Based on OPH
• Includes shunting mode SW module (link assurance signal, dead man function)

GSM-R functions and features can be accessed by the user through corresponding menus and specific buttons.


The CABRADIO is mounted on the train. It is the train driver’s main communication device and is also used for data transmission. The CABRADIO consists of several modules for easy and fast service.
The Mobile Radio Module (MRM) is the basic module for the locomotive cab radios and for other applications on the track, in wagons or in railway stations which require an 8 Watt RF output. This module covers the GSM and the GSM-R band, support the ASCI features and the EIRENE functions and resists the harsh “in cab” environmental conditions such as vibration, temperature range, air pressure.

Main Characteristics:

• GSM-R Frequency band
• ASCI and railway features
• Compatible and tested with Nortel Infrastructure
• Track-to-Train Radio and Data Communication
• Data capability
• 8 Watt Output power
• Cassette package to be housed in a 19” Rack
The train driver communicates via the Man Machine Interface (MMI) which displays all essential information. The MMI consists of a big display and a number of preprogrammed and programmable keys.
As the conditions for the installations differ from train type to train type, various packagingspackaging’s of the Mobile Train Radio Stations (MTRS) have been developed to adapt the cabradio to these requirements.

Nortel works closely with the Cabradio suppliers to integrate their solution in the GSMR network.
In addition to the MTRS, Nortel proposes portable cabradios, so called GSM-R Train radio unit for Migration (GTM). GTMs are compact cab radios for temporary use on trains. This may be needed during the migration phase, when trains pass areas where communication has been switched to GSM-R already while the train has not yet been equipped with a MTRS cabradio or even in post migration phase for trains that are rarely used and not planned to be equipped with a MTRS cabradio.



Nortel provides a complete range of GSM-R Dispatcher Terminal solutions for railway operators, including radio connected Dispatcher Terminals. Compliant with the EIRENE specifications, the Dispatcher Terminal portfolio includes essential railways specific functionalities.

Traffic Control switches provide the necessary support for the Dispatcher Terminals, including interfaces with the GSM-R network and to other railway systems. The priority mechanisms used within GSM-R are clearly understood, and so are the protocols used to transfer functional numbers.

Whatever the requirement, the combination of Nortel infrastructure and the Nortel qualified Dispatcher Terminals provide a proven, user friendly interface for the handling and placing of railway-related calls.

Main Characteristics:

• Fully EIRENE compliant.
• Compatible and tested with Nortel Infrastructure
• High flexible configuration of dispatcher terminal roles and responsibilities.
• Text message to and from the dispatcher terminals using functional numbering and LDA.
• Interfaces with train location systems to provide enhanced location dependant addressing (eLDA).
• Remote fault monitoring.
• Different Interfaces to non-GSM-R networks possible
• User-friendly operator interface with user selection of MMI language.
• List of incoming calls with priority handling and automatic answering of emergency calls.
• Decoding of Functional Numbers in incoming calls
• Call by Functional Number (or MSISDN).
• Extensive different phonebook
• Call Hold / Restore.
• Call Transfer / Multiparty and Group Calls.
• Handheld or hands-free operation
• Call Logging records