Exam 6: Signaling and Switching

Match each statement below with the correct item -A signal that indicates that a subscriber's telephone is off-hook and the circuit is not available for connection.

What is Lucent's most current all-digital switch?

Which of the following refers to the process of compressing and expanding areas of low and high amplitudes, respectively, to better quantize an analog signal that is being converted to a digital signal?

Which of the following is a method of switching in which a connection is established between two nodes before they begin transmitting data?

____________________ is a method of switching in which each intermediate node between the source and its target accepts and stores data before passing it on.

Does the term cell refer to a fixed-length group of data used in statistical multiplexing transmission?

In modulation, the ____________________ is the signal to be transmitted.

Match each statement below with the correct item -The first electronic telephone switch.

DWDM is the version of wavelength division multiplexing that can support a larger number of different wavelengths on the same strand of fiber, thus greatly increasing the bandwidth capacity of that fiber. _________________________

DMS is a series of local and tandem switches supplied by Nortel. _________________________

What was the first electronic telephone switch?

A(n) fiber optic modem is a device that can encode and decode a signal. _________________________

Which of the following is an indication that a subscriber's telephone is on-hook and the circuit is available for connection?

Filtering is a technique for inserting special bits in a data stream to indicate where one series of data-carrying time slots ends and another begins. _________________________

What name is given to a subchannel within a communications channel?

Which of the following is an indication that a subscriber's telephone is on-hook, after being off-hook?

What term is used to describe a wave whose characteristics are modified by the addition of an information wave?

A(n) cell is a subchannel within a communications channel. _________________________

Which of the following converts analog amplitude modulated signals into digital signals?

Match each statement below with the correct item -A method of modulation in which the amplitude of the carrier signal is modified by the imposition of the information signal.