Deck 6: Signaling and Switching

Question 1

The 1ESS was the first electronic telephone switch.

Answer 1

True

Question 2

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

Answer 2

True

Question 3

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

Answer 3

False

Question 4

Amplitude shift keying is a method of modulation in which the amplitude of the carrier signal is modified by the imposition of the information signal.

Question 5

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

Question 6

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

Question 7

A busy circuit is a tone of two combined frequencies that lasts for .5 seconds and repeats after .5 seconds of silence.

Question 8

A busy signal indicates that a subscriber's telephone is off-hook and the circuit is not available for connection.

Question 9

Circuit switching refers to a method of switching in which a connection is established between two nodes before they begin transmitting data.

Question 10

A demodulator is a device that can encode and decode a signal.

Question 11

Companding is 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. _________________________

Question 12

A(n) demodulator separates signals that were combined by multiplexing the receiving end of a modulated wave. _________________________

Question 13

A(n) demultiplexer separates the information from the carrier signal at the receiving end of a modulated wave. _________________________

Question 14

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. _________________________

Question 15

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

Question 16

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

Question 17

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. _________________________

Question 18

A(n) guardband is an information wave that is added to a carrier wave's frequency. _________________________

Question 19

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

Question 20

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

Question 21

Which of the following was the first electronic telephone switch?

A) 1ESS
B) 5ESS
C) AIN
D) ASK

Question 22

Which of the following is Lucent's most current all-digital switch?

A) 1ESS
B) 5ESS
C) AM
D) ASK

Question 23

A method of modulation in which the amplitude of the carrier signal is modified by the imposition of the information signal is known as:

A) ASK
B) AM
C) CCS
D) ESS

Question 24

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

A) ASK
B) AM
C) CCS
D) AIN

Question 25

Which of the following is a subchannel within a communications channel?

A) Backbone
B) AM
C) Band
D) Cell

Question 26

Which of the following is a heavily trafficked connection between a carrier's POPs?

A) Band
B) Cell
C) Carrier wave
D) Backbone

Question 27

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

A) Busy circuit
B) Busy signal
C) Carrier wave
D) Cell

Question 28

Which of the following is a wave whose characteristics are modified by the addition of an information wave?

A) Carrier wave
B) Guided wave
C) Information wave
D) Busy circuit

Question 29

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

A) Codec
B) Circuit switching
C) Cell
D) Band

Question 30

Which of the following is a method of out-of-band signaling developed by AT&T in the 1970s?

A) Codec
B) Cell
C) Circuit switching
D) Common Channel Signaling

Question 31

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?

A) Framing
B) Companding
C) In-band signaling
D) Filtering

Question 32

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

A) Demodulator
B) Demultiplexer
C) DMS
D) Guided wave

Question 33

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

A) Demodulator
B) Demultiplexer
C) DMS
D) Idle circuit

Question 34

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

A) Idle circuit
B) Guardband
C) Disconnect
D) Busy circuit

Question 35

Which of the following is part of the analog-to-digital conversion process that removes non-essential information from the signal?

A) Filtering
B) Framing
C) In-band signaling
D) Companding

Question 36

Which of the following is a method of sending multiple analog signals simultaneously over one channel by separating the channel into subchannels?

A) Frequency division multiplexing
B) Frequency shift keying
C) Frequency modulation
D) Fiber optic modem

Question 37

Which of the following 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?

A) Filtering
B) Framing
C) In-band signaling
D) Companding

Question 38

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?

A) Frequency modulation
B) Frequency shift keying
C) In-band signaling
D) Companding

Question 39

Which of the following is a method by which FM signals are converted into digital signals?

A) Frequency division multiplexing
B) Companding
C) Frequency modulation
D) Frequency shift keying

Question 40

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?

A) Guided wave
B) Guardband
C) In-band signaling
D) Filtering

Question 41

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

A) In-band signaling
B) Framing
C) Frequency Modulation
D) Idle circuit

Question 42

Which of the following uses the same communications channel as the information being exchanged?

A) Idle circuit
B) Guided wave
C) In-band signaling
D) Guardband

Question 43

The wave that represents the signal to be transmitted is known as:

A) Information wave
B) Guided wave
C) Carrier wave
D) Phase

Question 44

Which of the following is the exchange of alert, supervisory, and other information between switches at different central offices?

A) Information wave
B) Interoffice signaling
C) Local switch
D) Modulation

Question 45

Which of the following refers to a call in which the local loops from the caller and her intended receiver connect to the same end office?

A) Interoffice signaling
B) Message switching
C) Intra-office call
D) Information wave

Question 46

Which of the following is a part of a local switch's central control computer that monitors the status of hundred of SLICs?

A) Line group controller
B) Multiplexer
C) Phase modulation
D) Codec

Question 47

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?

A) Companding
B) Packet switching
C) Modulation
D) Phase modulation

Question 48

Which of the following is a device that imposes an information wave on a carrier wave at the transmission end?

A) Multiplexer
B) Modulator
C) Modem
D) Codec

Question 49

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

A) Modulator
B) Codec
C) Cell
D) Multiplexer

Question 50

Which of the following is a telecommunication term that refers to the condition of the line when a telephone handset is lifted, or taken off its hook?

A) On-hook
B) Busy signal
C) Disconnect
D) Off-hook

Question 51

Which of the following is a telecommunications term that refers to the condition of the line when a telephone handset is resting on its hook?

A) Off-hook
B) Disconnect
C) On-hook
D) Busy signal

Question 52

Which of the following is a small group of data organized according to standards?

A) Packet
B) Packet switching
C) Cell
D) Phase

Question 53

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

A) Phase modulation
B) Interoffice signaling
C) Packet switching
D) Framing

Question 54

Which of the following describes the relationship between a wave's cycle and time?

A) Phase
B) Phase modulation
C) Packet switching
D) Companding

Question 55

A method of modulation in which an information wave is applied to a carrier wave to modify the carrier wave's phase is known as:

A) Packet switching
B) Phase
C) Modulation
D) Phase modulation

Question 56

Does the term band refer to a subchannel within a communications channel?

Question 57

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

Question 58

Does the term filtering refer to a type of switch signaling that uses the same communications channel as the information being exchanged?

Question 59

Does the term packet refer to the relationship between a wave's cycle and time?

Question 60

Does the term off-hook refer to the condition of the line when a telephone handset is resting on its hook?

Question 61

Can you use codec to encode and decode a signal?

Question 62

Does the term carrier wave refer to the wave whose characteristics are modified by the addition of an information wave?

Question 63

Does the term on-hook refer to the condition of the line when a telephone handset is lifted, or taken off its hook?

Question 64

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?

Question 65

Does the term disconnect indicate that a subscriber's telephone is on-hook and the circuit is available for connection?

Question 66

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

Question 67

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

Question 68

____________________ is a part of a switch's central control computer that monitors the status of hundreds of SLICs.

Question 69

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

Question 70

A(n) ____________________ is used to convert digital signals to analog at the transmission end and analog into digital signals at the receiving end.

Question 71

____________________ occurs when data is separated into packets before being transmitted.

Question 72

____________________ separates data into packets before they are transported.

Question 73

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

Question 74

____________________ is a narrow band of unused frequency that separates two information-carrying bands and ensures that signals do not interfere with each other.

Question 75

____________________ is a type of switch signaling that uses the same communications channel as the information being exchanged.

Question 76

Match each statement below with the correct item

-The first electronic telephone switch.

A) AM
B)Backbone
C)Carrier wave
D)Companding
E)Band
F)5ESS
G)Busy circuit
H)Codec
I)Common channel signaling
J)1ESS

Question 77

Match each statement below with the correct item

-Lucent's most current all-digital switch.

A) AM
B)Backbone
C)Carrier wave
D)Companding
E)Band
F)5ESS
G)Busy circuit
H)Codec
I)Common channel signaling
J)1ESS

Question 78

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.

A) AM
B)Backbone
C)Carrier wave
D)Companding
E)Band
F)5ESS
G)Busy circuit
H)Codec
I)Common channel signaling
J)1ESS

Question 79

Match each statement below with the correct item

-A subchannel within a communications channel.

A) AM
B)Backbone
C)Carrier wave
D)Companding
E)Band
F)5ESS
G)Busy circuit
H)Codec
I)Common channel signaling
J)1ESS

Question 80

Match each statement below with the correct item

-A major, heavily trafficked connection between a carrier's POPs.

A) AM
B)Backbone
C)Carrier wave
D)Companding
E)Band
F)5ESS
G)Busy circuit
H)Codec
I)Common channel signaling
J)1ESS