CHAPTER 1 - TELECOMMUNICATIONS OVERVIEW

ANS: F REF: 2

The receiver is the device that captures the message from the communications channel and converts it into a form that the person or machine at the destination can understand.

ANS: T REF: 3

The type of communication in which messages flow in only one direction, from source to destination, is known as simplex.

ANS: T REF: 3

In full-duplex communication, messages can travel over the communications channel in both directions simultaneously.

ANS: T REF: 4

In one-to-one communication, a single source sends information to a single destination.

ANS: T REF: 4

In one-to-many communication, a single source simultaneously sends information to multiple destinations.

ANS: T REF: 4

Voice telecommunications refers to any means of using electrical signals to transmit the human voice across a distance, such as telephones and radio broadcasts.

ANS: T REF: 5

Which of the following involves an exchange of information between electrical or electronic devices?

Which of the following occurs when the parties sending and receiving information are human?

The originator of a message is known as the:

Which of the following is the means of carrying a signal from the source to the destination?

In the context of data communications, a communication channel is more commonly referred to as the:

Which of the following is the device that captures the message from the communications channel and converts it into a form that a person or machine at the destination can understand?

Which of the following is the person or machine to whom the message is directed in a communications exchange?

The type of communication in which messages flow in only one direction, from source to destination, is known as:

The type of communication that allows messages to travel over the communications channel in both directions simultaneously is known as:

ANS: D REF: 4

Which of the following is an example of half-duplex communication?

Which of the following occurs when a single source simultaneously sends information to multiple destinations?

Which of the following occurs when many sources issue messages to many destinations?

ANS: C REF: 4

Telecommunication services are typically divided into which of the following categories?

Which of the following refers to the use of electrical signals to exchange encoded information between computerized devices across a distance?

Which of the following form the foundation of most major data telecommunications system?

A combination of voice, video, and data communication along the same communication channel is called:

Companies that supply the communications channels for voice and data transmission, are known as:

Companies that supply the user and connectivity equipment, such as telephones, are known as:

A facility dedicated to fielding customer calls is known as:

ANS: B REF: 10

A method of sending information over the telephone by pressing buttons in response to recorded voice prompts, is known as:

ANS: A REF: 10

An advanced call center at a utilities company typically uses both an ACD and a(n):

ANS: B REF: 12

The use of data telecommunications to conduct business transactions is known as:

ANS: A REF: 14

The use of telecommunications technology to inform, educate, or train students across distances is referred to as:

A transmission media that contains thin strands of glass in its core and uses pulses of light to convey signals is known as:

ANS: B REF: 18

Documented agreements containing technical specifications or other precise criteria that stipulate how a particular product is designed are commonly referred to as:

When the parties sending and receiving information are human, ____________________ occurs.

ANS: personal communication REF: 2

____________________ involves an exchange of information between electrical or electronic devices.

ANS: Data communication REF: 2

The ____________________ is the originator of the message, whether it is a person or machine.

ANS: source REF: 2

The ____________________ is the equipment that modifies the message into the form required for transmission.

ANS: transmitter REF: 2

The communications ____________________ is the means of carrying the signal from the source to the destination.

ANS: channel REF: 3

A communication channel is more commonly referred to as the ____________________ medium.

ANS: transmission REF: 3

The ____________________ is the device that captures the message from the communications channel and converts it into a form that the person or machine at the destination can understand.

ANS: receiver REF: 3

The ____________________ in a communications exchange is the person or machine to whom the message is directed.

ANS: destination REF: 3

The type of communication in which messages flow in only one direction, from source to destination, is known as ____________________.

ANS: simplex REF: 3

____________________ occurs when messages travel in both directions between the source and the destination, but only in one direction.

ANS: Half-duplex REF: 3

ANS: T REF: 41

Current electricity is the controlled movement of an electrical charge along the atoms of a conductor.

ANS: T REF: 41

The pressure that the electric current exerts on its conductor is known as amperes.

ANS: F REF: 43

Resistance is measured in volts.

ANS: F REF: 44

In alternating current (AC), an electrical charge flows steadily in one direction over the conductor.

ANS: F REF: 47

Which of the following is a release of an accumulated charge in some material or object?

Which of the following refers to the controlled movement of an electrical charge?

Which of the following is a closed connection between an electric source and a load over which current flows?

When current is manipulated to transmit information, it becomes:

The material over which electric current readily flows is known as:

Materials that do not allow electric current to flow easily are called:

The charge flowing through a wire each second is measured in:

A material's opposition to current is referred to as:

Resistance is measured in:

Which of the following allows an electrical charge to flow steadily in one direction over a conductor?

Which of the following allows an electrical charge to flow in one direction first, then in the opposite direction, then back in the first direction?

Which of the following refers to the number of cycles in a sine wave that are completed within a specified time frame?

Frequency is measured in:

When electrons move, they produce:

Which of the following measures resistance?

Which of the following measures Power?

Which of the following measures frequency?

____________________ is the controlled movement of an electrical charge along the atoms of a conductor.

ANS:

Current electricity

Electric current

REF: 41

A(n) ____________________ is a closed connection between an electric source and a load over which current may flow.

ANS: circuit REF: 42

A material over which electric current readily flows is known as a(n) ____________________.

ANS: conductor REF: 42

When current is manipulated to transmit information, it becomes a(n) ____________________.

ANS: signal REF: 42

____________________ is a material's opposition to electric current.

ANS: Resistance REF: 44

ANS: T REF: 99

Simultaneously transmitting a signal in both directions along the same wire is known as duplexing.

ANS: T REF: 99

Telephones are examples of wireline technology.

ANS: T REF: 104

A type of signaling in which visual cues represent letters or words is known as a semaphore.

ANS: T REF: 98

A tandem switching center is an exchange where lines from multiple homes and businesses in one geographic area converge and terminate.

ANS: F REF: 104

Which of the following is the company that was initially formed when American Bell took controlling interest in Western Electric?

Which of the following is a geographic area that is serviced by a single low-power transmitter for wireless communication?

Which of the following is a telephone company facility where lines are terminated and can also be connected with other lines to complete calls?

Which of the following is an automated telephone switch that used a grid of horizontal and vertical bars with electromagnets at their ends?

Which of the following is the transmission of a signal from an orbiting satellite to an earth-based receiver?

The simultaneous transmission of a signal in both directions along a single transmission pathway is referred to as?

Which of the following is an early computer that was developed in cooperation between the U.S. Army and the University of Pennsylvania?

ANS: B REF: 108

Which of the following is a method of transmitting signals that uses one wave containing the information to be transmitted, combined with another wave?

The service that is initiated and terminated between LATAs is referred to as:

ANS: B REF: 119

Which of the following initiates and terminates within a local service area?

The 1913 agreement between AT&T and the U.S. Department of Justice that forced AT&T to divest itself of Western Union, is referred to as?

A geographical area that defines local phone calls is referred to as:

Which of the following is an exchange where multiple phone lines from homes and businesses in one geographic area converge and terminate?

A method of presenting characters with a series of dots and dashes is known as:

The simultaneous transmission of multiple signals over one transmission pathway is referred to as:

The type of signaling in which visual cues are used to represent letters or words is referred to as:

A transmission technique in which samples from multiple incoming lines are digitized then issued to the same circuit, is referred to as:

An exchange where lines from multiple local office converge and terminate is referred to as:

An exchange where lines from multiple tandem switching centers converge and terminate is referred to as:

The type of signaling where visual cues represent letters or words, is known as a(n) ____________________.

ANS: semaphore REF: 98

Simultaneously transmitting a signal in both directions along the same wire is referred to as ____________________.

ANS: duplexing REF: 99

Simultaneously transmitting an indeterminate number of multiple signals over one circuit is referred to as ____________________.

ANS: multiplexing REF: 99

The ____________________ used a grid of horizontal and vertical bars with electromagnets at their ends.

ANS: crossbar switch REF: 103

A(n) ____________________ center is a place where multiple telephone lines from homes and businesses in one geographic area converge and terminate.

ANS: local switching REF: 104

A(n) ____________________ center is an exchange where lines from multiple local offices converge and terminate.

ANS: tandem switching REF: 104

A(n) ____________________ center is an exchange where lines from multiple tandem switching centers converge and terminate.

ANS: toll switching REF: 104

Telegraphs and telephones are examples of ____________________ technology.

ANS:

wireline

wire-bound

wire bound

REF: 104

ANS: T REF: 155

The NXX number is a prefix that represents a line's central office prefix.

ANS: T REF: 172

The system of cabling, poles, towers, and other connectivity equipment between the demarcation point and central offices is referred to as the outside plant.

ANS: T REF: 147

The cable that runs from a subscriber's demarcation point to telephone pole or underground conduit is known as a jump wire.

ANS: F REF: 153

Out-of-band signaling is a technique in which signals between switches, including all status and routing information, are communicated over a separate path on the network that voice signals use.

ANS: T REF: 167

Which of the following refers to the determination of the path that a call's circuit will travel in order to be completed?

Which of the following refers to the establishment of a circuit between the caller and the party whose number was dialed?

The maintenance of the circuit between a caller and the party whose number was dialed is referred to as:

Which of the following is a direct provider of a public telecommunications service that is subject to regulation by the FCC?

The cabling that connects multiple subscriber drop wires in a neighborhood to a larger conduit is known as:

The cable that runs from a subscriber's demarcation point to a telephone pole, or underground conduit, is referred to as:

A thick tube in which cables are housed to remain protected from environmental damage is referred to as:

The cabling and equipment located within a carrier's central office is known as:

Which of the following is the portion of a subscriber's connection to a carrier's network that links a residence or business to its local phone company's central office?

The place where numerous individual incoming lines first terminate at a central office is called:

The physical point at which a subscriber's facilities connect with a service provider's facilities is known as:

Which of the following is a prefix that represents a line's central office prefix?

Which of the following is a technique in which signals between switches are communicated over a separate path on the network from that which is used by voice signals use?

Which of the following is a type of telecommunications carrier that leases links, or other facilities, in wholesale amounts from another carrier, and resells the service to consumers under its name?

ANS: A REF: 145

The geographical boundary that includes all of a central office's subscribers is known as:

The device attached to incoming LEC lines at the network interface that prevents a customer's telephone equipment from being damaged, is referred to as:

Which of the following refers to the place where a wire ends?

A transmission route between switches is referred to as:

The digits transmitted with a phone number to identify the number to which the call should be billed is referred to as:

ANS: B REF: 172

____________________ is the determination of the path that a call's circuit will travel in order to be completed.

ANS: Call routing REF: 162

____________________ is the establishment of a circuit between the caller and the party whose number she has dialed.

ANS: Call setup REF: 162

____________________ is the maintenance of the circuit between a caller and the called party.

ANS: Call supervision REF: 176

____________________ are direct providers of a public telephone telecommunications service that is subject to regulation by the FCC and state public utilities commission.

ANS: Common carriers REF: 145

The cable that connects a subscriber's demarcation point to a telephone pole is known as ____________________.

ANS: drop wire REF: 153

____________________ is the cabling and equipment located within a carrier's central offices.

ANS: Inside plant REF: 155

A circuit that is used for voice or data transmission is known as a(n) ____________________.

ANS: line REF: 144

The geographical boundary that includes all of a central office's subscribers is known as a(n) ____________________

ANS: Serving area REF: 152