Railway Telecommunications Systems Quiz

<p>Line tester (C)</p> Signup and view all the answers

<p>Rack layout plan (D)</p> Signup and view all the answers

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

<p>Digital signaling (D)</p> Signup and view all the answers

<p>8 digits long (B)</p> Signup and view all the answers

<p>Exchange with capacity higher than 128 ports can be designed. (C)</p> Signup and view all the answers

<p>It allows multiple connections without interference. (D)</p> Signup and view all the answers

<p>The call gets transferred to the boss. (C)</p> Signup and view all the answers

<p>2 Mbps (C)</p> Signup and view all the answers

<p>Audio conferencing (C)</p> Signup and view all the answers

<p>In a separate room (C)</p> Signup and view all the answers

<p>Copper strip (D)</p> Signup and view all the answers

<p>22-25 degree C (B)</p> Signup and view all the answers

<p>Fill with sand and plaster the top (D)</p> Signup and view all the answers

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

<p>Command should cause malfunction (C), Operator should be locked out (D)</p> Signup and view all the answers

<p>It should not stop or unduly alter system configuration (B)</p> Signup and view all the answers

<p>To allow system quality check and fault indication (C)</p> Signup and view all the answers

<p>They can join using only audio if required. (D)</p> Signup and view all the answers

<p>Video conferencing hardware (B)</p> Signup and view all the answers

<p>Either 230V AC or -48V DC (B)</p> Signup and view all the answers

<p>A VDU, keyboard, and printer with a PC (C)</p> Signup and view all the answers

<p>Disconnecting type connectors (B)</p> Signup and view all the answers

<p>SMPS (Switch Mode Power Supply) charger (C)</p> Signup and view all the answers

<p>They must be terminated on a rack forming the MDF. (C)</p> Signup and view all the answers

<p>Testing should occur only from the MDF. (B)</p> Signup and view all the answers

<p>0.8 Erlang/Trunk line (A)</p> Signup and view all the answers

<p>Boss-secretary configuration (D)</p> Signup and view all the answers

<p>1+1, active-passive or active-active configuration (C)</p> Signup and view all the answers

<p>Uniform 5-digit number across the zonal Railway network (D)</p> Signup and view all the answers

<p>Common off-the-shelf hardware (C)</p> Signup and view all the answers

<p>Securing the network instead of using secure protocols (C)</p> Signup and view all the answers

<p>Assist in failure analysis (C)</p> Signup and view all the answers

<p>Direct Inward Dialing (DID) and Direct Outward Dialing (DOD) (A)</p> Signup and view all the answers

<p>It should be only slightly above the exchange fed voltage levels. (B)</p> Signup and view all the answers

<p>It should monitor performance and detect, locate, and report faults. (D)</p> Signup and view all the answers

<p>To promptly isolate equipment in cases of voltage or current overload. (C)</p> Signup and view all the answers

<p>It should not produce noticeable heat in the main components. (C)</p> Signup and view all the answers

<p>Checking the battery set voltage and UPS/charger output. (D)</p> Signup and view all the answers

<p>They automatically recover from operational faults. (A)</p> Signup and view all the answers

<p>Decreased efficiency in speech or signaling circuits. (C)</p> Signup and view all the answers

<p>Fortnightly. (D)</p> Signup and view all the answers

A method of connecting telephone networks, often between zonal and divisional exchanges or to PSTN.

A uniform 5-digit number system for railway divisions across zonal networks.

Direct Inward/Outward Dialing for connecting to PSTN exchanges.

An IP-based intercom system for senior railway officers.

A backup power system for IP exchange servers, providing automatic failover.

Standardized hardware for IP and analog telephones.

Estimated traffic load for trunk lines; 0.8 Erlang/line.

Secure connections that can be enabled using protocols to protect calls.

Connections on an exchange for various communication types, including telephones, trunk lines, and attendant consoles.

Ports designed for high-speed communication between exchanges, often using 2 Mbps or greater.

The total number of connections and services an exchange can handle (wired, equipped).

A type of exchange that uses Time Division Multiplexing, allowing multiple signals to share one line.

Signaling methods used for communication between the user's phone and the exchange.

Signaling protocols used for communication between different exchanges.

An 8-digit telephone number used on the railway system, including a 3-digit STD code.

A feature enabling multiple people to participate in a conference call.

The measurement of how easily an electrical current can flow from an earth electrode into the ground. This is crucial for safety and grounding.

Testing the physical components of an electronic system to ensure they are functioning correctly according to the manufacturer's specifications.

Testing the software of a system to ensure it is working as intended, meeting the supplier's guidelines and specifications.

A detailed diagram showing the arrangement of equipment, cabling, and connections within a phone exchange.

Information about each customer using the telephone service, including their telephone number and location.

A central point in a telecommunications system where cables are connected and organized. It's usually located in a separate room, not the exchange room, and has an earth connection for safety.

A conductive path connecting the Main Distribution Frame to the ground, preventing electrical shock. Usually made of copper strip clamped to the frame.

Measures to protect equipment from damage caused by lightning strikes and sudden voltage fluctuations. Involves using earth wires connecting equipment to the Earth Distribution Frame.

A separate frame within a telecommunications room where earth wires from different equipment are connected. A critical component for grounding and safety.

The exchange equipment room should be air-conditioned to maintain a cool and stable temperature (22-25 degrees Celsius) for optimal equipment functionality.

Equipment in the exchange room should be mounted on racks, not directly on walls. Racks should be at least 1 meter away from the wall, fixed firmly to the floor.

The language used for communication between humans and the telecommunications system. Should be simple English, easy to learn and use for issuing commands and interpreting output.

Continuous monitoring of the telecommunications system for potential faults and problems. Includes measures like regular testing and fault indication.

A railway video conferencing system should integrate with the railway exchange using SIP, allowing subscribers to join meetings with audio only if needed.

A device that connects the exchange system to different types of telephone lines, enabling communication with various services such as PSTN.

The interface used to control and monitor the exchange system, typically a computer with a keyboard, screen, and printer.

IP exchanges require two sets of UPS and batteries to provide a minimum of 12 hours of backup power in case of outages.

A rack that connects indoor and outdoor cables in the exchange system, including protection and isolation features.

A rack that connects outdoor cables to the indoor switchboard cables, providing connectivity between the exchange's external and internal systems.

The telephones used by subscribers to access the exchange system, available in analog, digital, and VoIP versions.

Specialized tools used for testing, troubleshooting, and maintaining the exchange system.

The system can monitor its own performance, identify problems, pinpoint their location, and report them.

The system is designed to tolerate a single hardware failure without completely crashing.

The protective device on the IDF (Intermediate Distribution Frame) prevents damage to equipment from abnormal voltages or currents.

The device should not interfere with normal communication, respond quickly to surges, isolate faulty equipment, and not overheat.

These components are part of the protective device. The fuse breaks the circuit in case of overload, while the lightning discharger diverts excess energy from lightning strikes.

Regular checks to ensure the system is running smoothly and identify potential issues before they cause problems.

The voltage level of the battery backup system, which provides power during outages.

A record of past problems and how they were resolved, used for understanding trends and improving system reliability.