VHF Communication in Total Failure of Communications
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Questions and Answers

What should the Station Master do first when the line communication system is found defective?

  • Switch on the wireless set immediately
  • Check the maintenance logs for issues
  • Contact the other Station Master by phone
  • Wait one minute before switching on the wireless set (correct)

What is required for obtaining Permission To Approach for each train?

  • A written form submitted to headquarters
  • A digital confirmation from the main office
  • Identification Number specific to each train (correct)
  • Station names and time of departure

During total failure of communications, how many Station Masters can communicate at one time?

  • Only one Station Master can communicate at a time (correct)
  • Multiple Station Masters can talk simultaneously
  • Two Station Masters can communicate on a rotating basis
  • The control center handles all communications

What information must all train passing messages include during the communication period?

<p>Identity of the Station Master, train number, and Private Numbers (D)</p> Signup and view all the answers

What must be done after sending a message over the wireless system?

<p>Release the Pressel Switch immediately and say 'OVER' (B)</p> Signup and view all the answers

What happens to the wireless sets after the line communication circuits are restored?

<p>They must be turned off immediately (C)</p> Signup and view all the answers

Which of the following actions is NOT part of the initial procedure for using the wireless set?

<p>Ensure line communication system is functional (C)</p> Signup and view all the answers

What should the initiating Station Master confirm with the other Station Master?

<p>Train numbers and timings passed just before the interruption (D)</p> Signup and view all the answers

What is the purpose of the identification number sheet in the Eastern Railway context?

<p>To document the usage of train halves (D)</p> Signup and view all the answers

In the identification number sheet, which positions correspond to the left half and right half of the train respectively?

<p>Column 1 and Column 2 (D)</p> Signup and view all the answers

Which entry represents the number of trains associated with a particular identification number?

<p>Train numbers in Column 1 and 2 (D)</p> Signup and view all the answers

Which of the following codes represents the Q entry in the identification number sheet?

<p>51, Z, 49 (A)</p> Signup and view all the answers

What do the letters in the identification number sheet represent?

<p>Specific attributes of train usage (C)</p> Signup and view all the answers

What is required to confirm the receipt of 'Permission to Approach'?

<p>An entry in the Train Signal Register (A)</p> Signup and view all the answers

When must the Sr.DOM / Sr.DOM(G)/ DOM(G) be advised during an interruption?

<p>Immediately upon the occurrence of an interruption (A)</p> Signup and view all the answers

What must happen to an Identification Number sheet once it has been used?

<p>It should be returned to the Sr.DOM / Sr.DOM(G)/ DOM(G) immediately (D)</p> Signup and view all the answers

How must the sealed envelope containing an Identification Number sheet be managed?

<p>It must remain sealed until the sheet is required (B)</p> Signup and view all the answers

What is the responsibility of the Station Master regarding the Identification Number sheets?

<p>To ensure their safe custody under lock and key (C)</p> Signup and view all the answers

After an interruption, what action should be taken with any partly used Identification Number sheets?

<p>They must be returned to Sr.DOM / Sr.DOM(G)/ DOM(G) immediately (A)</p> Signup and view all the answers

What should be done if a sheet is exhausted during an interruption?

<p>It needs to be sent to the Sr.DOM / Sr.DOM(G)/ DOM(G) (D)</p> Signup and view all the answers

What is the consequence of opening an Identification Number sheet’s envelope?

<p>It must be kept secured until the interruption ends (B)</p> Signup and view all the answers

Which channel should be used for the first section during a Total Failure of Communications (TFC)?

<p>Channel 5: 160.550 MHz (A)</p> Signup and view all the answers

What is the frequency of Channel 6 used during Total Failure of Communications?

<p>159.600 MHz (B)</p> Signup and view all the answers

What is the purpose of the Identification Number sheets issued by the Sr.DOM?

<p>To manage communication during interruptions. (B)</p> Signup and view all the answers

After a Total Failure of Communications is resolved, which channel should be reverted back to?

<p>Channel 2 (A)</p> Signup and view all the answers

How many Identification Number sheets will be issued to each station for each adjoining block Section?

<p>Two sheets. (C)</p> Signup and view all the answers

How many frequencies are allocated for taking Line Clear during a Total Failure of Communications?

<p>Three frequencies (B)</p> Signup and view all the answers

What must be done with the Identification Number sheet once communication is restored?

<p>Return it immediately to the Sr.DSO. (C)</p> Signup and view all the answers

What will happen to the used Identification Number sheets in areas with quick VHF set usage?

<p>Five new sheets will be issued in sealed envelopes. (D)</p> Signup and view all the answers

Which part of the Identification Number sheet is sent to the station at one end of a Block section?

<p>Left half of the sheet (A)</p> Signup and view all the answers

What must be done to the two parts of the Identification Number sheet before they are issued?

<p>They must be signed and dated. (B)</p> Signup and view all the answers

How many Identification Number sheets does the Sr.DOM prepare for the Kalyani-Madanpur section?

<p>Two sheets. (B)</p> Signup and view all the answers

What should be included in the columns of each part of the Identification Number sheet?

<p>Combinations of numbers and letters (C)</p> Signup and view all the answers

How are the envelopes containing the half sheets marked?

<p>With consecutive numbering. (A)</p> Signup and view all the answers

What information is endorsed on the envelopes containing the Identification Number sheets?

<p>Identification Number sheet details. (B)</p> Signup and view all the answers

Who is responsible for writing the names of the two stations on each half of the sheet before issue?

<p>The Sr.DOM / Sr.DOM(G)/ DOM(G) (B)</p> Signup and view all the answers

What is the consequence of using one Identification Number sheet for more than one period of interruption?

<p>It can lead to miscommunication. (B), It is against protocol. (C)</p> Signup and view all the answers

What should Madanpur do before despatching a train to Kalyani?

<p>Open sealed envelope no. 1 and inform Kalyani (C)</p> Signup and view all the answers

What action should Kalyani take after receiving the identification letter and figure from Madanpur?

<p>Advise Madanpur that the section is clear (C)</p> Signup and view all the answers

What is the final step Kalyani must perform at the end of the Line Clear message?

<p>Provide the first Identification Number along with Private Numbers (B)</p> Signup and view all the answers

Once Madanpur checks Kalyani's provided Identification Number, what should he do if it is correct?

<p>Enter it on the Line Clear Ticket (B)</p> Signup and view all the answers

What is required for subsequent trains in either direction?

<p>Identification Numbers must be used serially (B)</p> Signup and view all the answers

Which of the following must occur before the train is despatched?

<p>Madanpur must receive a confirmation signal from Kalyani (A)</p> Signup and view all the answers

What does the enquiry message from Madanpur conclude with?

<p>The identification letter and figure (C)</p> Signup and view all the answers

Which statement describes the responsibility of the Station Master concerning the train entry?

<p>Identification Numbers must be continually checked and recorded (A)</p> Signup and view all the answers

What must the Station Master do after switching on the wireless set during a Total Failure of Communications?

<p>Check train numbers and timings with the other Station Master. (A)</p> Signup and view all the answers

During the use of wireless sets, how are messages concluded?

<p>With the term OVER. (D)</p> Signup and view all the answers

What is the primary purpose of using wireless sets during a communication failure?

<p>To maintain communication for passing train messages. (D)</p> Signup and view all the answers

Why is it essential for all train passing messages to include the identity of the Station Master?

<p>To establish accountability in communications. (A)</p> Signup and view all the answers

What action should be taken after sending a message via the wireless communication system?

<p>Release the Pressel Switch to allow the other Station Master to respond. (B)</p> Signup and view all the answers

What should happen to the wireless set during the period of restored line communication?

<p>It will stay on until line communication circuits are restored. (A)</p> Signup and view all the answers

How often can one Station Master communicate at any given time using the wireless system?

<p>Only one Station Master can communicate at a time. (B)</p> Signup and view all the answers

What frequency is assigned to Channel 7 used during Total Failure of Communications?

<p>151.400 MHZ (D)</p> Signup and view all the answers

Which channel should be used for the second adjoining section during a Total Failure of Communications?

<p>Channel 6 (C)</p> Signup and view all the answers

How many frequencies are specifically assigned for taking Line Clear during a Total Failure of Communications?

<p>Three (B)</p> Signup and view all the answers

Who is responsible for writing the names of the two stations on each half of the Identification Number sheet before issue?

<p>The Sr.DOM / Sr.DOM(G)/ DOM(G) (A)</p> Signup and view all the answers

What happens to the two parts of an Identification Number sheet before they are issued?

<p>They are separated and sent to each of the respective stations (C)</p> Signup and view all the answers

What is the required action after the Total Failure of Communications is resolved?

<p>Revert back to channel 2 (A)</p> Signup and view all the answers

In the Identification Number sheet, how are the columns organized?

<p>Columns are divided into left and right halves with identical numbers (B)</p> Signup and view all the answers

Which frequency corresponds to Channel 5 in VHF sets for Line Clear?

<p>160.550 MHZ (B)</p> Signup and view all the answers

What must be done with an Identification Number sheet that has been partly used after an interruption is over?

<p>It must be returned to the Sr.DOM / Sr.DOM(G)/ DOM(G). (A)</p> Signup and view all the answers

Which of the following statements is true regarding the management of Identification Number sheets?

<p>Once opened, they should be kept in the possession of the Station Master. (A)</p> Signup and view all the answers

What responsibility does the Sr.DOM / Sr.DOM(G)/ DOM(G) have when an Identification Number sheet is exhausted?

<p>To arrange for fresh Identification Number sheets to be sent. (B)</p> Signup and view all the answers

How should the sealed envelope containing an Identification Number sheet be treated until needed?

<p>It must remain unopened until the sheet is required. (C)</p> Signup and view all the answers

What process must be followed after using the Identification Number sheet in case of an interruption?

<p>Check it against its corresponding half and then destroy it. (D)</p> Signup and view all the answers

What action should be taken as soon as any other means of communication is restored?

<p>Return the Identification Number sheet being used during the interruption. (D)</p> Signup and view all the answers

How many Identification Number sheets are prepared for the Kalyani-Madanpur section?

<p>Two sheets, one for each direction. (B)</p> Signup and view all the answers

What is done with the Identification Number sheets before they are issued?

<p>Two parts are separated and sealed in individual envelopes. (A)</p> Signup and view all the answers

How are the envelopes containing the half sheets of the Identification Number labeled?

<p>With sequential numbers corresponding to each half sheet. (B)</p> Signup and view all the answers

What action is required at stations where VHF sets are frequently used?

<p>Issuing five Identification Number sheets in separate sealed envelopes. (D)</p> Signup and view all the answers

What endorsement should be made on the envelopes containing the Identification Number sheets?

<p>Identification Number sheet for the specific section. (B)</p> Signup and view all the answers

Who is responsible for signing and dating each half of the Identification Number sheet?

<p>The Sr.DOM / Sr.DOM(G) / DOM(G). (C)</p> Signup and view all the answers

What will occur if one Identification Number sheet is used for more than one period of interruption?

<p>It may lead to confusion and operational issues. (D)</p> Signup and view all the answers

What is the primary purpose of issuing Identification Number sheets by the Sr.DOM?

<p>To ensure communication continuity during interruptions. (D)</p> Signup and view all the answers

What should Kalyani do after he has opened his sealed envelope?

<p>Call Madanpur and ask for the first identification letter and figure. (C)</p> Signup and view all the answers

What is the correct action for Madanpur after Kalyani sends the 'Is Line Clear' signal?

<p>Immediately send the 'Is Line Clear' signal for the desired train. (D)</p> Signup and view all the answers

How should the identification numbers be used for subsequent trains?

<p>Use subsequent identification numbers serially as indicated in the previous communications. (B)</p> Signup and view all the answers

What must each Station Master do at the time of using an Identification Number?

<p>Immediately enter the number and date of the train against each identification number used. (D)</p> Signup and view all the answers

What should Kalyani do after providing Madanpur with the first identification number?

<p>Notify Madanpur that the line is clear. (B)</p> Signup and view all the answers

During subsequent communications for each train, how should the identification number be given?

<p>In the order provided in the previous communications. (B)</p> Signup and view all the answers

What action must Madanpur take upon receiving Kalyani's information?

<p>Confirm the identification number before proceeding. (C)</p> Signup and view all the answers

What should happen if a sealed envelope for identification numbers is opened?

<p>The station should use the numbers as instructed without delay. (A)</p> Signup and view all the answers

What must each Station Master do after confirming a train's entry using an Identification Number?

<p>Update the identification number list for future reference. (A)</p> Signup and view all the answers

Flashcards

VHF Set Communication During TFC

Wireless sets are used for train passing communications when the regular line communication system fails.

Establishing Communication (Step 1)

Station Master waits for a minute, switches on the VHF, and checks if the other end is working.

Verifying Train Information

Station Masters exchange recent train details (numbers, times, private numbers) to ensure the right stations are communicating.

Simplex Communication System

Only one station master can talk at a time in VHF communication, during TFC.

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Train Passing Messages

All train passing messages, and Permission to Approach information during TFC, must use VHF communication.

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Identification Number

Permission To Approach is needed for each train during VHF communication failure.

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Using the Pressel Switch

The Pressel Switch is used for train passing during TFC and when finishing an exchange.

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End of Communication

The term "OVER" is used to end VHF communications.

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VHF Channel 5 Frequency

160.550 MHz, used for Line Clear in TFC.

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VHF Channel 6 Frequency

159.600 MHz, used for Line Clear in TFC.

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VHF Channel 7 Frequency

151.400 MHz, used for Line Clear in TFC.

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Line Clear during TFC

Communication procedure for Line maintenance during complete communication failure.

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Identification Number Sheets

Sheets with letter-number combinations used for permission to approach.

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Block Section

An area of communication stations.

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Station Master

The supervisor of a station. This individual uses established VHF channels (such as 5, 6, and 7) during an emergency to restore communications.

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Total Failure of Communications (TFC)

Complete breakdown of communication.

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TFC Communication

When regular communication is disrupted, VHF sets come into play for passing trains, like an emergency radio for trains. This is called TFC, or Train Failure Communication.

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Sr.DOM/Sr.DOM(G)/DOM(G)

Responsible for issuing and managing identification number sheets for different train sections.

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How many sheets?

The Sr.DOM issues two sheets per section, one for each station. Five sheets are given to stations using VHF frequently.

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Sheet Usage

Each sheet is used for one interruption only. Once regular communication is restored, the used sheet is returned for a new one.

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Station Master's Duty

The Station Master receives the Identification Number sheet, uses it for train passing information, and returns it when communication is restored.

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Sheet Preparation

The sheet is prepared for a specific section, with each half containing details for the corresponding station.

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Sending the Sheet

The sheet is split and each half is sent to the respective station in a sealed envelope, numbered and marked with the section name.

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Train Signal Register

A record where the Station Master logs the receipt of "Permission to Approach" requests using identification numbers during VHF communication failure.

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Line Clear Ticket

A document issued during VHF failure to authorize a train's movement, with identification numbers noted for verification.

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Sr.DOM(G) / DOM(G)

Senior / General Divisional Operational Manager responsible for providing and replacing identification number sheets during communication disruptions.

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Sealed Envelope

The packaging for identification number sheets, designed to maintain their security and prevent misuse until needed.

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Interruption

Any period of time when full communication fails, requiring identification numbers for train movements.

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Safe Custody

The Station Master's responsibility to maintain secure control of identification number sheets, preventing unauthorized use.

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Misuse

Improper or unauthorized usage of identification numbers that could compromise train safety and lead to accidents.

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What does Sr.DOM/Sr.DOM(G)/DOM(G) do?

These individuals are responsible for issuing and managing Identification Number sheets for different train sections.

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How are the sheets used?

Each sheet is used for one interruption only. Once regular communication is restored, the used sheet is returned for a new one.

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What does the Station Master do with the sheet?

The Station Master receives the Identification Number sheet, uses it for train passing information, and returns it when communication is restored.

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What happens during initial communication?

The Station Master who wants to send a train calls the other Station Master on the phone and announces that they're opening sealed envelop #1, which contains a code. The other Station Master does the same.

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How is the first train identification confirmed?

Madanpur reads the first letter and figure from their code sheet, and Kalyani checks if it matches their own code sheet. Kalyani confirms if the code is correct and is ready to receive the 'Is Line Clear' signal.

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What signals are used to start the train?

After confirming the initial code, Madanpur sends the 'Is Line Clear' signal to Kalyani. Kalyani then gives permission and provides their first identification code, which Madanpur checks again.

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How are subsequent trains handled?

For each train, the Station Master asking for 'Permission to Approach' gives the other Station Master the next identification number in sequence, receiving the corresponding number and permission in return.

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What happens to the used identification numbers?

Each Station Master records the train number and date corresponding to every used identification number on their code sheet.

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What is the purpose of identification numbers?

They act as unique identifiers for each train during communication failure and ensure a safe and controlled movement.

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Why are code sheets used?

Code sheets ensure clear communication and control during communication failure, eliminating confusion and ensuring smooth operation.

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What is the key principle for train passing during TFC?

Using identification numbers as a secure verification method for train movement, ensuring safe and controlled train passing during communication failure.

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Simplex Communication

In VHF communication, only one station master can talk at a time. They must wait for the other station master to finish before speaking.

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Permission to Approach

Station masters exchange identification numbers using VHF communication to grant trains permission to continue their journey during TFC.

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Pressel Switch

A button on the VHF set that is pressed to transmit a message. It is also used to confirm the end of a message.

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Station Master's Role in TFC

During TFC, the station master uses VHF communication to control train movements. They receive and verify identification numbers, authorize trains, and ensure safety.

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TFC

Total Failure of Communications - a complete breakdown of the communication system

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Line Clear Frequencies

Three frequencies used for communication during TFC: Channel 5 (160.550 MHz), Channel 6 (159.600 MHz), and Channel 7 (151.400 MHz).

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Line Clear Procedure

A systematic approach to re-establishing communication during TFC, starting with Channel 5 for the first section, followed by Channel 6 for the second, and so on.

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Train Passing during TFC

The process of obtaining Permission to Approach using Identification Numbers during TFC, ensuring safe train movements.

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What are Identification Number Sheets?

Sheets with letter-number combinations used for permission to approach during communication failure.

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Who issues Identification Number Sheets?

The Sr.DOM/Sr.DOM(G)/DOM(G) (Senior/General Divisional Operational Manager) is responsible for issuing and managing them.

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How many sheets per section?

Two sheets are issued for each block section, one for each station.

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Where are the sheets kept?

They are kept in sealed envelopes, addressed to each station, until needed.

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What happens when communication is restored?

The used Identification Number sheet is returned to the Sr.DOM for replacement.

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What happens during the first train's communication?

The Station Master wanting to send a train opens their sealed envelope, revealing their code. The receiving Station Master does the same, and they compare the first letter and number in their codes to ensure they're communicating correctly.

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How is the first train's movement authorized?

After the initial code check, the receiving Station Master sends a signal to authorize the train. The sending Station Master then shares their next identification number, which is then confirmed.

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What happens for subsequent trains?

For each train, the Station Master wanting permission to approach gives the other Station Master the next identification number in sequence, receiving the corresponding number and permission in return.

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Who is responsible for maintaining the Identification Number sheets?

The Station Master receives the sheet, uses it for train passing information, and returns it when communication is restored.

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Why are Identification Number sheets important?

They ensure safe and controlled train movements during communication failures by providing unique identifiers for each train.

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Is Line Clear Signal

A communication signal exchanged during TFC to confirm the track is safe for a train to proceed.

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VHF Set

A portable radio used for communication during TFC, allowing train crews to communicate with each other and with control centers.

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Sr.DOM(G)

Senior Divisional Operational Manager (General): Responsible for issuing and managing Identification Number sheets for train sections.

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Train Passing Procedure

The process of exchanging Identification Numbers between stations during TFC to allow trains to safely pass each other.

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Study Notes

VHF Sets During Total Failure of Communications (TFC)

  • Wireless sets are used for communication during TFC
  • Station Master switches on wireless set and waits at least one minute
  • Checks with other Station Master for train numbers and times passed before interruption
  • Transmits Station name and private numbers using telephone receiver
  • Both Station Masters switch on wireless sets to establish communication
  • Communication continues until line communication restored
  • Train passing messages are relayed using this system
  • Permission To Approach obtained with train details
  • Simplex system enables one station master to talk at a time
  • Messages end with "OVER"; Station Master releases switch
  • Frequencies use 160.550 MHz, 159.600 MHz, and 151.400 MHz

Line Clear During TFC

  • For safety, 3 frequencies assigned: 5, 6, and 7
  • 25W simplex VHF sets programmed for each frequency
  • Channel 5 used first during TFC

Identification Number Sheets

  • Two sheets per block section complement each station

  • Each sheet has two parts with letter/figure combinations

  • Left half sent to one end of block section; right half to other end

  • Sender marks station names on sheets numbered 1 & 2 respectively

  • Sheets signed and dated, sealed in envelopes

  • Use for periods of line interruption

  • Use identification numbers through clear messages

  • Sheets returned to Senior Station Master after use/interruptions

  • Sheets are used only during current interruption; not for future ones

  • Station Masters must keep covers secure

  • Senior DOM/DOM/DOM(G) is responsible for sheets.

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VHF Set Working Rules PDF

Description

This quiz covers the procedures for using VHF sets during Total Failure of Communications (TFC) in the railway sector. It discusses how Station Masters establish communication, the frequencies used, and the protocols for safety and message transmission. Test your knowledge on the critical steps in maintaining communication during emergencies.

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