IC3 Chapter 23

Telephones and fax machines are forms of telecommunications.

• True

• False

The Public Switched Telephone Network (PSTN) forms a circuit between any two telephones.

• True

• False

A telephone company's common network, or local loop, is an entirely digital system.

• True

• False

In analog communications, sounds are transmitted as waves.

• True

• False

Fiber-optic cables are strands of glass that transmit analog sound waves by pulses of light.

• True

• False

Because computers are digital devices, there is no way to connect them to an analog telephone network to transmit data.

• True

• False

A modem does its work through two processes: modulation and demodulation.

• True

• False

Today's modems can transmit data at speeds up to 300 bits per second.

• True

• False

Because they must convert data between digital and analog forms, fax machines have built-in modems.

• True

• False

Currently the fastest technology is DSL transmission.

• True

• False