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CELLULAR TELEPHONY

Total questions: 100

Worksheet time: 50mins

Name
Class
Date
1.

A term used for increasing the capacity of a cellular phone system.

a)

Cell sharing

b)

frequency re-use

c)

cell splitting

d)

regeneration

2.

What is the transmission rate of a GSM cellular system?

a)

64 kbps

b)

128 kbps

c)

240 kbps

d)

270 kbps

3.

The uplink frequency allocation of the earliest GSM network.

a)

935 - 960 MHz

b)

890 - 915 MHz

c)

700 - 890 MHz

d)

900 - 980 MHz

4.

Provides interface between the mobile telephone switching office and the mobile units.

a)

Cell site

b)

database

c)

terrestrial link

d)

radio transmitter

5.

Which of the following is not part of the GSM network?

a)

OSS

b)

ESS

c)

BSS

d)

MSC

6.

Part of the switching system that performs the telephony switching functions of the system. It also controls calls to and from other telephone and data systems.

a)

HLR

b)

VLR

c)

AuC

d)

MSC

7.

A multiple access technique used in GSM cellular system.

a)

TACS

b)

TDMA

c)

FDMA

d)

CDMA

8.

Part of the base station system that provides all the control functions and physical links between the MSC and the BTS.

a)

OSS

b)

BSC

c)

AuC

d)

BSS

9.

Referred to as the reverse link channel of the cellular duplex system.

a)

Cell to cell

b)

mobile unit to cell

c)

cell to mobile unit

d)

mobile to mobile unit

10.

An analog mobile telephone system which was designed for United Kingdom using 900 MHz frequency band.

a)

GSM

b)

TACS

c)

IMTS

d)

CDMA

11.

A special tone frequency, which is transmitted by the mobile unit to cell site signaling call termination.

a)

1 MHz

b)

10 kHz

c)

50 kHz

d)

100 Hz

12.

The old US standard for cellular services

a)

AMPS

b)

ADC

c)

TACS

d)

NMT

13.

Part of the cellular switching system which acts as a database used for storage and management of subscriptions.

a)

AuC

b)

VLR

c)

HLR

d)

MSC

14.

In GSM, duplex distance is defined as the distance between the uplink and the downlink frequencies.

a)

80 MHz

b)

50 MHz

c)

30 MHz

d)

100 MHz

15.

It is the transfer of a call from one cell site to another as the cellular phone moves thru the service coverage area.

a)

Hand-over

b)

handshaking

c)

hand-off

d)

hand-on

16.

A service offered by some cellular service providers that allows subscribers to use their cellular phones while traveling outside their home service areas.

a)

Frequency re-use

b)

roaming

c)

hand-off

d)

cell transfer

17.

The amount of time a subscriber uses the cellular phone.

a)

Block time

b)

stand-by time

c)

talk time

d)

air time

18.

It is a process when a single cell is subdivided into smaller cells.

a)

Cell splitting

b)

frequency re-use

c)

cell sharing

d)

cell division

19.

Which of the following is not an analog cellular standard?

a)

AMPS

b)

NADC

c)

ETACS

d)

CNET

20.

A spread spectrum cellular transmission method that allows multiple users to share the same radio frequency spectrum by assigning each active user a unique code.

a)

CDMA

b)

FDMA

c)

TDMA

d)

QMSK

21.

The physical size of a cell in cellular system is dependent on

a)

Frequency allocation

b)

location

c)

power

d)

user density

22.

The interference found between two cells using the same frequency.

a)

Adjacent channel

b)

intermodulation

c)

subcarrier frequency

d)

co-channel

23.

Which of the following is not an analog tone of Supervisory Audio Tone?

a)

6000 Hz

b)

5500 Hz

c)

5970 Hz

d)

6030 Hz

24.

The modulation technique used by GSM cellular system.

a)

QAM

b)

PSK

c)

FSK

d)

GMSK

25.

Refers to the first generation of local loop system in telecommunications technology.

a)

TACS

b)

DECT

c)

Analog Cellular

d)

GSM

26.

In a cellular telephone system, each cell site contains a ____.

a)

touch tone processors

b)

control computer

c)

repeater

d)

direct link to a branch exchange

27.

When the signal from a mobile cellular unit drops below a certain level, what action occurs?

a)

the cell site switches antennas

b)

the call is terminated

c)

the unit is “handed off” to a closer cell

d)

the MTSO increases power level

28.

In a cellular telephone system, group of cells is called ____.

a)

sector

b)

cluster

c)

site

d)

cell segment

29.

In Cellular Telephone Systems, these are transmissions from base stations to mobile units (Downlink)

a)

forward links

b)

reverse links

c)

TRX

d)

TRA

30.

In Cellular Telephone Systems, these are transmissions from mobile units to base stations (Uplink)

a)

forward links

b)

reverse links

c)

TRX

d)

TRA

31.

In Cellular Radio, AMPS stand for:

a)

American Mobile Phone System

b)

Analog Mobile Phone Service

c)

Advanced Mobile Phone System

d)

Advanced Mobile Phone Service

32.

In Cellular Radio, BSC stands for:

a)

Base Station Controller

b)

Base Signal Controller

c)

Basic Service Contract

d)

Basic Service Code

33.

In Cellular Radio, MSC stands for:

a)

Mobile Switching Center

b)

Mobile Service Cellular

c)

Maximum Signal Carrier

d)

Minimum Signal Carrier

34.

In GSM, voice channels are called:

a)

traffic channels

b)

bearer channels

c)

voice channels

d)

talking channels

35.

In Mobile Communications, GSM uses:

a)

frequency hopping

b)

CDMA

c)

direct-sequence modulation

d)

all of the above

36.

In Mobile Communications, IMSI stands for:

a)

Integrated Mobile Subscriber Identification

b)

International Mobile Subscriber Identification

c)

Interim Mobile Subscriber Identification

d)

Intermodulation System Interference

37.

A feature that permits a subscriber to dial a number by calling the number out to the cellular phone, instead of punching the numbers in the phone. This technology has been offered to several models of mobile phones which contribute to convenience as well as driving safety.

a)

automatic dialing system

b)

voice-activated dialing

c)

automatic call system

d)

voice-controlled system

38.

It is the commonly used cellular network that transmits voice and data over cellular channels using analog technology.

a)

A system

b)

B system

c)

Circuit-switched

d)

Amplitude Modulated System

39.

The amount of time the subscriber can leave the fully charged cellular portable or transportable phone turned on before the phone will completely discharge the batteries.

a)

battery time

b)

standby time

c)

battery life

d)

cellular time

40.

A process that provides security for wireless information. Information is encoded so that it can be read by a device with a matching decoding procedure.

a)

wireless decoder

b)

cellular decoder

c)

encryption

d)

decoder

41.

41. PCS stands for:

a)

Personal Communications Service

b)

Personal Communications Systems

c)

Personal Cell phone Service

d)

Portable Communications Systems

42.

MTSO stands for:

a)

Minimum Transmitted Signal Output

b)

Maximum Transmitted Signal Output

c)

Mobile Telephone Switching Office

d)

Mobile Transmission Time-Out

43.

MIN stands for:

a)

Manual Identification Number

b)

Mobile Identification Number

c)

Maximum In-band Noise

d)

Minimum In-band Noise

44.

ESN stands for:

a)

Electronic Serial Number

b)

Emitted Signal Number

c)

Emission Strength Number

d)

none of the above

45.

The combination of the mobile cell phone and the cell site radio equipment is called the:

a)

BSC

b)

RF interface

c)

MTSO

d)

air interface

46.

The optimum cell-site radius is:

a)

2 km

b)

as small as possible

c)

0.5 km

d)

none of the above

47.

One way to increase the capacity of a cell phone system is:

a)

increase the number of cells

b)

decrease the number of cells

c)

increase the ERP

d)

decrease the ERP

48.

______________ was the most common cellular phone system in North America.

a)

AMPS

b)

TACS

c)

CDMA

d)

NMT

49.

Frequency ________________ is what makes cellular phone systems complex.

a)

Hopping

b)

Re-use

c)

assignment

d)

control

50.

A ________________ occurs when an in-use cell-phone moves from one cell site to another.

a)

roaming

b)

hand off

c)

hands-free

d)

capture effect

51.

A cell phone moving into a site with no available frequencies will have a ________________ call.

a)

lost

b)

blocked

c)

dropped

d)

all of these

52.

The reduction in cell size to increase traffic is called cell ________________.

a)

reduction

b)

minimization

c)

control

d)

splitting

53.

A _______________ site is a very small unit that can mount on a streetlight pole.

a)

macrocell

b)

microcell

c)

picocell

d)

nanocell

54.

Very small cells called _______________ are used for reliable indoor reception.

a)

macrocells

b)

microcells

c)

picocells

d)

nanocells

55.

GSM is used in:

a)

Asia

b)

North America

c)

Europe

d)

all of the above

56.

AMPS uses:

a)

CDMA

b)

spread-spectrum

c)

TDMA

d)

none of the above

57.

GSM uses:

a)

frequency hopping

b)

CDMA

c)

direct-sequence modulation

d)

all of the above

58.

In GSM, SIM stands for:

a)

Short Inbound Message

b)

Subscriber-Initiated Message

c)

Subscriber ID Module

d)

Subscriber ID Method

59.

IMSI stands for:

a)

Integrated Mobile Subscriber Identification

b)

International Mobile Subscriber Identification

c)

Interim Mobile Subscriber Identification

d)

Intermodulation System Interference

60.

IS-95 uses:

a)

frequency hopping

b)

CDMA

c)

TDMA

d)

all of the above

61.

IS-136 uses:

a)

frequency hopping

b)

CDMA

c)

TDMA

d)

all of the above

62.

In CDMA:

a)

all frequencies are used in all cells

b)

each cell uses half the available frequencies

c)

each cell is assigned a frequency by the base

d)

the frequency is selected by the mobile phone

63.

63. PCS stands for _______________ Communications System.

a)

Public

b)

Private

c)

Personal

d)

any of these

64.

64. PCS systems are called _______________-generation systems.

a)

first

b)

second

c)

third

d)

2.5

65.

Besides TDMA and CDMA, _______________ is also used in North America for PCS.

a)

AMPS

b)

TACS

c)

GSM

d)

none of these

66.

The spread-spectrum technique used in IS-95 PCS is _______________.

a)

FHSS

b)

DSSS

c)

OFDM

d)

none of these

67.

The spread-spectrum technique used in GSM is _______________.

a)

FHSS

b)

DSSS

c)

OFDM

d)

none of these

68.

Unlike AMPS, CDMA allows for a _______________ handoff.

a)

hard

b)

soft

c)

both a and b

d)

none of these

69.

Unlike other systems, in CDMA _______________ frequencies are used in all cells.

a)

any

b)

not all

c)

all

d)

only a few

70.

GPRS stands for General _______________ Radio Service.

a)

Private

b)

Public

c)

Personal

d)

Packet

71.

W-CDMA stands for _______________ CDMA.

a)

Wireless

b)

Wideband

c)

Wired

d)

Wide Area

72.

The sharing of a medium and its link by two more devices is called _______.

a)

Modulation

b)

Encoding

c)

Line Encoding

d)

Multiplexing

73.

Which multiplexing technique transmits analog signals?

a)

FDM

b)

TDM

c)

WDM

d)

(a) and (c)

74.

Which multiplexing technique transmits digital signals?

a)

FDM

b)

TDM

c)

WDM

d)

None of the above

75.

Which multiplexing technique shifts each signal to a different carrier frequency?

a)

FDM

b)

TDM

c)

Both (a) and (b)

d)

None of the above

76.

In TDM, for n signal sources of the same data rate, each frame contains __________ slots.

a)

n

b)

n + 1

c)

n - 1

d)

0 to n

77.

In TDM, The transmission rate of the multiplexed path is usually _______ the sum of the transmission rate of the signal sources.

a)

Greater than

b)

Less than

c)

Equal to

d)

1 less than

78.

A ________ is computerized center that is responsible for connecting calls, recording call information, and billing.

a)

base station

b)

mobile switching center

c)

cell

d)

mobile station

79.

In _______, a mobile station always communicates with just one base station.

a)

roaming

b)

a hard handoff

c)

a soft handoff

d)

a roaming handoff

80.

________ is a first generation cellular phone system.

a)

AMPS

b)

D-AMPS

c)

GSM

d)

IS-95

81.

________ is a second generation cellular phone system

a)

D-AMPS

b)

GSM

c)

IS-95

d)

All of the above

82.

AMPS uses ________ for modulation.

a)

FM

b)

FSK

c)

PM

d)

a and b

83.

________ separates AMPS voice channels

a)

CDMA

b)

TDMA

c)

FDMA

d)

b and c

84.

________ is a cellular telephone systems popular in Europe.

a)

AMPS

b)

D-AMPS

c)

GSM

d)

IS-95

85.

D-AMPS used ________ for multiplexing.

a)

CDMA

b)

TDMA

c)

FDMA

d)

b and c

86.

GSM uses ________ for multiplexing.

a)

CDMA

b)

TDMA

c)

FDMA

d)

b and c

87.

DSSS is used by the ________ cellular phone systems.

a)

AMPS

b)

D-Amps

c)

GSM

d)

IS-95

88.

________ base stations uses GPS for synchronization.

a)

AMPS

b)

D-Amps

c)

GSM

d)

IS-95

89.

IS-95 has a frequency reuse factor of ________.

a)

a. 1

b)

b. 3

c)

c. 7

d)

d. 12

90.

The master control center for a cellular telephone system is the

a)

Cell site

b)

Mobile telephone switching office

c)

Center office

d)

Branch office

91.

Each cell site contains a

a)

Repeater

b)

Control computer

c)

Direct link to a branch exchange

d)

Touch - tone processor

92.

Multiple cells within an area may use the same channel frequencies

a)

True

b)

False

c)

either

d)

neither

93.

Cellular telephones use which type of operation?

a)

Simplex

b)

Half-duplex

c)

Full-duplex

d)

Triplex

94.

The maximum frequency deviation of an FM cellular transmitter is

a)

6 kHz

b)

12 kHz

c)

30 kHz

d)

45 kHz

95.

The maximum output power of a cellular transmitter is

a)

4.75 W

b)

1.5 W

c)

3 W

d)

5 W

96.

The output power of a cellular radio is controlled by the

a)

User or Caller

b)

Cell site

c)

Caller party

d)

MTSO

97.

When the signal from a mobile cellular unit drops below a certain level, what action occurs?

a)

The unit is “handed off” to a closer cell.

b)

The call is terminated.

c)

The MTSO increases power level.

d)

The cell site switches antennas.

98.

In a cellular radio, the duplexer is a

a)

Ferrite isolator

b)

Waveguide assembly

c)

Pair of TR/ATR tubes

d)

Pair of sharp bandpass filter

99.

The frequency band designated for PCS in North America is:

a)

800 MHz

b)

1.9 GHz

c)

900 MHz

d)

12 GHz

100.

Compared to AMPS, PCS cell sites are:

a)

bigger

b)

distributed

c)

smaller

d)

higher-power