Exam 5: Making Connections Efficient: Multiplexing and Compression

____________________ is a relatively new technology that has been used extensively by both the military and cellular telephone companies.

What are the major disadvantages of frequency division multiplexing?

The STS-1 signaling level supports ____ frames per second.

WDM supports multiple lambdas.

Chip spreading codes are ____ bits in length.

Audio engineers compress music through techniques called perceptual noise shaping,or ____________________.

DSL is capable of achieving speeds into the millions of bits per second.

In the 1960s,AT&T created a service known as ____,which multiplexed digital data and digitized voice onto a high-speed telephone line with a data rate of 1.544 megabits per second.

SONET and SDH are both ____ multiplexing techniques.

____ is designed for short-distance connections and has only a few lambdas,with a greater space between lambdas.

______ is a technique that is very commonly used to compress video images.

The inability of a single fiber-optic line to meet users' needs is called ____________________.

____ is a technology that allows a high-speed data signal to traverse a standard copper-based telephone line.

Code division multiplexing is based upon a class of modulation techniques known as spread spectrum technology.

Time division multiplexing (TDM)allows only one user at a time to transmit.

____ multiplexes multiple data streams onto a single fiber-optic line.

In FDM,____ take up frequencies that might be used for other data channels,thus introducing a certain level of wastefulness.

The T-1 system is a classic application of frequency division multiplexing.

The human ear can hear sounds only within a certain range,which for an average person is 10 Hz to 40 kHz (40,000 Hz).

____ division multiplexing is a good technique for transmitting multiple concurrent signals over a fiber-optic line.