Telecommunications devices relay signals between computer systems and transmission media.

Voice and phone communications are examples of asynchronous communications.

Narrowband communications can exchange data very quickly.

Broadband communications supports a very low rate of data exchange.

Twisted-pair wire offers cleaner and crisper data transmission (less noise) than coaxial cable.

Microwave signals can carry thousands of channels at the same time.

A communications satellite can operate in the microwave frequency range.

Radio transmission operates in the 15 Hz–30 MHz range of the electromagnetic spectrum.

Infrared transmission requires line-of-sight transmission and short distances (under a few hundred yards).

Infrared transmission allows handheld computers to transmit data and information to larger computers within the same room and to connect a display screen, a printer, and a mouse to a computer.

A cable modem can deliver network and Internet access up to 500 times faster than a standard modem and phone line.

Most home and small business users are connected to an asymmetric DSL (ADSL) line designed to provide a connection speed from the Internet to the user (download speed) that is three to four times faster than the connection from the user back to the Internet.

WANs usually consist of computer equipment owned by the user, together with data communications equipment and telecommunications links provided by various carriers and service providers.

With network management software, a manager on a networked personal computer can monitor the use of individual computers and shared hardware (such as printers), scan for viruses, and ensure compliance with software licenses.

Fault detection and performance management are the two types of network-management products.

The Simple Network Management Protocol allows anything on the network to communicate with management software about its current operations and state of health.

Electronic document distribution lets you send and receive documents in a digital form without printing them.

A network center is a physical location where an organization handles customer and other telephone calls, usually with some amount of computer automation.

Videoconferencing enables people to hold a conference by combining voice, video, and audio transmission.

Public network services give personal computer users access to vast databases, the Internet, and other services, usually for an initial fee plus usage fees.

Wire transfer is an extremely fast, reliable means to move funds from one account to another.

Voice over IP is a secure private network that connects all U.S. financial institutions to one another by way of the Federal Reserve Board.

Distance learning can extend the classroom through the use of telecommunications.

Videoconferencing reduces travel expenses and time, and increases managerial effectiveness through faster response to problems, access to more people, and less duplication of effort by geographically dispersed sites.

A potential issue with broadband over power lines is that transmitting data over unshielded power lines can interfere with both ham radio broadcasts and police and fire radios.

A(n) ____ is any material substance that carries an electronic signal to support communications between a sending and receiving device.

____ communications occurs when the receiver gets the message instantaneously, when it is sent.

____ communications occur when the receiver gets the message after some delay - sometimes hours or days after the message is sent.

The term telecommunications ____ refers to the rate at which data is exchanged.

The twisted pair wire known as ____ is frequently installed in new buildings and is capable of carrying data at speeds faster than 1 Gbps.

A ____ orbits the Earth directly over the equator, approximately 22,000 miles above the Earth so that it appears stationary.

A ____ system employs many satellites, each in a circular orbit at an altitude of a few hundred miles.

A ____ is a two-way satellite ground station with a dish antenna smaller than 3 meters in diameter.

A(n) ____ sends signals through the air via light waves at a frequency of 300 GHz and above.

A(n) ____ is a variable signal that is continuous in both time and amplitude so that any small fluctuations in the signal are meaningful.

A ____ is a telecommunications hardware device that converts communications signals so they can be transmitted over the communication media.

A(n) ____ is a telecommunications service that delivers high-speed Internet access to homes and small businesses over the existing phone lines of the local telephone network.

A(n) ____ is a wireless network that connects information technology devices within a range of 33 feet or so.

A network that connects computer systems and devices within a small area, such as an office, home, or several floors in a building is a(n) ____.

A(n) ____ is a telecommunications network that connects users and their computers in a geographical area that spans a campus or city.

A(n) ____ is a telecommunications network that connects large geographic regions.

With ____, all processing occurs in a single location or facility.

With ____, processing devices are placed at various remote locations.

With ____, computers are placed at remote locations but connected to each other via telecommunications devices.

A ____ is a telecommunications device that connects one LAN to another LAN that uses the same telecommunications protocol.

A ____ forwards data packets across two or more distinct networks toward their destinations through a process known as routing.

A ____ is a network device that serves as an entrance to another network.

With ____, users can send, receive, and store verbal messages for and from other people around the world.

____ is a way to communicate data from one company to another and from one application to another in a standard format.

____ is a system of transferring money from one bank account directly to another without any paper money changing hands.