Exam 6: Signaling and Switching

Amplitude modulation is a method for converting analog amplitude modulated signals into digital signals.

____________________ is the exchange of alert, supervisory, and other information between switches at different central offices.

Which device is located at both the transmitting and receiving ends of a wavelength division multiplexed channel?

The 5ESS is Lucent's most current all-digital switch.

Which of the following is a narrow band of unused frequency that separates two information-carrying bands and ensures that signals do not interfere with each other?

Which of the following is a method of modulation in which the frequency of the carrier signal is modified by the application of the information signal?

Which of the following is a device that can combine and transmit many signals on a single channel?

Match each statement below with the correct item -A device that can encode and decode a signal.

Does the term busy signal refer to a tone of two combined frequencies that lasts for .5 seconds and repeats after .5 seconds of silence?

Which device separates signals combined by multiplexing and regenerates them in their original form at the receiving end?

Which of the following is a signal-processing technique in which an information wave is imposed on a carrier wave to create a unique wave pattern?

Which of the following separates information from the carrier signal at the receiving end of a modulated wave?

Idle circuit is an indication that a subscriber's telephone is on-hook, and the circuit is available for connection. _________________________

The relationship between a wave's cycle and time is known as a(n) ____________________.

Match each statement below with the correct item -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 by which FM signals are converted into digital signals?

Which of the following is a tone of two combined frequencies that lasts for .5 seconds and repeats after .5 seconds of silence?

Which of the following is a method of switching in which data are separated into packets before they are transported?

A subchannel within a communications channel is referred to as a band.

A heavily trafficked connection between a carrier's POPs is known as a backbone.