Cab Secure Radio - AbsoluteAstronomy.com

Cab Secure Radio is an in-cab analogue

Analog transmission

Analog transmission is a transmission method of conveying voice, data, image, signal or video information using a continuous signal which varies in amplitude, phase, or some other property in proportion to that of a variable...

radiotelephone

Radiotelephone

A radiotelephone is a communications system for transmission of speech over radio. Radiotelephone systems are not necessarily interconnected with the public "land line" telephone network. "Radiotelephone" is often used to describe the usage of radio spectrum where it is important to distinguish the...

system used on parts of the British railway network

Rail transport in Great Britain

The railway system in Great Britain is the oldest in the world, with the world's first locomotive-hauled public railway opening in 1825. As of 2010, it consists of of standard gauge lines , of which are electrified. These lines range from single to double, triple, quadruple track and up to twelve...

. Its main function is to provide a secure

Secure communication

When two entities are communicating and do not want a third party to listen in, they need to communicate in a way not susceptible to eavesdropping or interception. This is known as communicating in a secure manner or secure communication...

speech

Speech

Speech is the human faculty of speaking.It may also refer to:* Public speaking, the process of speaking to a group of people* Manner of articulation, how the body parts involved in making speech are manipulated...

link between the train driver

Railroad engineer

A railroad engineer, locomotive engineer, train operator, train driver or engine driver is a person who drives a train on a railroad...

and the signaller

Signalman (rail)

A signalman or signaller is an employee of a railway transport network who operates the points and signals from a signal box in order to control the movement of trains.- History :...

which cannot be overheard by other train drivers. In areas where CSR is used it must be the primary method of communication between driver and signaller, always being used in preference to the signal post telephone

SPT

SPT may refer to:Organizations* Sony Pictures Television, American television company* Strathclyde Partnership for Transport, organization which plans public transport* SPTrans, a large urban public transport authority in São Paulo, Brazil* St...

. Within the next few years CSR will be replaced by the GSM-R

GSM-R

GSM-R, Global System for Mobile Communications - Railway or GSM-Railway is an international wireless communications standard for railway communication and applications. A sub-system of European Rail Traffic Management System , it is used for communication between train and railway regulation...

digital

Digital

A digital system is a data technology that uses discrete values. By contrast, non-digital systems use a continuous range of values to represent information...

system, as it forms the initial phase of rollout of ERTMS throughout the UK.

History

CSR was first introduced in the Glasgow

Glasgow

Glasgow is the largest city in Scotland and third most populous in the United Kingdom. The city is situated on the River Clyde in the country's west central lowlands...

area in 1986 to enable driver-only operation of trains. It was later used in the London

London

London is the capital city of :England and the :United Kingdom, the largest metropolitan area in the United Kingdom, and the largest urban zone in the European Union by most measures. Located on the River Thames, London has been a major settlement for two millennia, its history going back to its...

and Liverpool

Liverpool

Liverpool is a city and metropolitan borough of Merseyside, England, along the eastern side of the Mersey Estuary. It was founded as a borough in 1207 and was granted city status in 1880...

areas.

Functions

Signaller can call and speak to driver.
Driver can call and speak to signaller.
Signaller and driver can exchange preset text
Written language
A written language is the representation of a language by means of a writing system. Written language is an invention in that it must be taught to children, who will instinctively learn or create spoken or gestural languages....

messages.
Signaller can send emergency stop messages to a particular train, or all trains in an area.
Driver can make an emergency call to signaller.
Signaller can speak to passenger
Passenger
A passenger is a term broadly used to describe any person who travels in a vehicle, but bears little or no responsibility for the tasks required for that vehicle to arrive at its destination....

s via the train's public address
Public address
A public address system is an electronic amplification system with a mixer, amplifier and loudspeakers, used to reinforce a sound source, e.g., a person giving a speech, a DJ playing prerecorded music, and distributing the sound throughout a venue or building.Simple PA systems are often used in...

system.
Signaller can connect driver to the railway telephone
Telephone
The telephone , colloquially referred to as a phone, is a telecommunications device that transmits and receives sounds, usually the human voice. Telephones are a point-to-point communication system whose most basic function is to allow two people separated by large distances to talk to each other...

network.
Signaller notified if DSD is released after DSD alarm displays for 30 seconds on radio

Use

The driver initialises the CSR with an area code followed by the identification number of the signal in front of the train. The radio then automatically sends the stock number of the train (eg, 455112), to the signalling system. The signaller then allocates a Train reporting number

Train reporting number

A train reporting number is used by railway staff in Great Britain to identify a particular train service. It consists of:* A single-digit number, indicating the class of train* A letter, indicating the destination area...

(eg, 2M34) to the train. This reporting number is used by the signalling equipment to track the progress of the train as it moves through the rail network.

Each signalling area (or signal panel within a larger signalbox) uses a different radio channel corresponding with an area code. As the train passes from the jurisdiction of one signaller to another, the CSR in the driver's cab changes channel automatically. Lineside signs are provided to inform the driver of where the area code changes. Occasionally the radio may fail to change channel or lose the signal completely, in which case the driver can enter the code manually.

History

Functions

Use

See also