Wire communications & Cellular Telephony [MITRC refresher]1.        When was the first complete sentence ever transmitted by the telephone?a.        1860b.       1876c.        1892d.        1905

2.        Who invented the first practical system for the electrical switching of calls installed in 1892?

a.        Bellb.        Watsonc.        Edisond.       Strowger

3.        What part of the conventional telephone set the transmitter and receiver unit are located?

a.        Dialb.        Basec.        Keypadd.       Handset

4.        The type of transmitter widely used in the conventional telephone seta.        Carbonb.        Ceramicc.        Piezoelectricd.        Electromagnetic

5.        Who invented the first carbon type transmitter?a.        Bellb.        Watsonc.        Grayd.       Edison

6.        The type of receiver widely used in the conventional telephone seta.        Electromagneticb.        Ceramicc.        Carbond.        Piezoelectric

7.        How many unique tones are used for the 12-key dial-tone multi frequency keypad?a.        2b.        4c.        7d.        12

8.        In the telephone unit, what is produced when the balancing network in a hybrid circuit is intentionally unbalanced slightly so that the small amount of transmitted signal is fed to the receiver of the talking phone?

a.        Dial toneb.       Side tonec.        Echod.        Singing

9.        The type of dialing possible for telephone set with rotary dial.a.        Tone dialingb.       Pulse dialingc.        Loop dialingd.        e&m dialing

10.     DTMF stands fora.        Digital telephone multimode functionb.       Dual tone multifrequencyc.        Dialing time made fasterd.        Data transmission multiplex filter

11.     The signal heard on the telephone line that indicates readiness of the central office in receiving address or telephone number

a.        Dial toneb.        Ringing tonec.        Busy toned.        Congestion tone

12.     The signal heard on the telephone line which indicates that the called subscriber sets is in use

a.        Dial toneb.        Ringing tonec.        Busy toned.        Congestion tone

13.     Dial tone, busy tone and ring back tone are examples of _____ signal.a.        Supervisionb.        Addressc.        Musicald.        Digital

14.     Request for service from the telephone is detected at the Central Office asa.        Dial pulsesb.        Ringing signalc.        Flow of loop currentd.        Battery reversal

15.     The maximum length for 1300-ohm signaling or loop resistance using AWG 26 wire with 133.9 ohms per kilometer

a.        5.2 kmb.        4.7 kmc.        7.5 kmd.       9.7 km

16.     With attenuation loss limits at 6 dB, what it the length of cable using gauge 26 with attenuation loss of 1.61 dB per kilometer?

a.        1.3 kmb.        2.5 kmc.        3.7 kmd.        4.9 km

17.     The attenuation loss limit of the subscriber loop is set at 6dB. What is the maximum length if a 26H88 loading coil with an attenuation of 0.80 dB per kilometer is added?

a.        1.5 kmb.        3.5 kmc.        5.5 kmd.       7.5 km

18.     The first number of the loaded cable designation 19H44 indicatesa.        Spacingb.        Coil inductancec.        Wire gauged.        Attenuation

19.     The letter of the loaded cable designation 24B88 indicatesa.        Spacingb.        Coil inductancec.        Wire gauged.        Attenuation

20.     The last two digit of the loaded cable designation 22E66 indicatesa.        Spacingb.       Coil inductancec.        Wire gauged.        Attenuation

21.     The Strowger or step-by-step system falls under what type of switching control system?

a.        Manualb.       Progressivec.        Commond.        Automatic

22.     What type of control system Crossbar switches are operating?a.        Manualb.        Progressivec.        Commond.        Automatic

23.     The kind of telephone system that require the incoming analog signals to be converted to PCM words before being switched

a.        Analog systemb.       Digital systemc.        Step-by-stepd.        Crossbar system

24.     A switching network capable of providing a path from every inlet link to every outlet link in the absence of traffic

a.        Concentrationb.        Blockingc.        Full availability switchd.        Crosspoint

25.     The inability to interconnect two idle lines connected to a switching network due to all possible paths are in use

a.        Concentrationb.       Blockingc.        Full availabilityd.        Crosspoint

26.     Line finder switches are found in what kind of telephone system?a.        Step-by-stepb.        Crossbarc.        Digital exchanged.        Mobile telephone system

27.     In the telephone industry, BORSCHT functions are performed bya.        Subscriber line interfaceb.        Crosspoint matrixc.        Switching networkd.        Connector switch

28.     BORSCHT stands fora.        Battery, over-voltage protection, ringing, supervision, coding, hybrid and

testingb.        Battery, on-hook, regulator, surge protect, circuit, hybrid and testc.        Name of a leading manufacturer of telephone systemd.        Acronym for the developers of computer

29.     The location where all subscriber lines are terminated and switching equipment facility is installed

a.        Central officeb.        Toll officec.        Gate wayd.        Tandem

30.     A series of numbers dialed from the telephone in order to use the telecom service such as direct distance dialing

a.        Zip codeb.       Access codec.        Addressd.        Exchange code

31.     The three-digit code used in long distance dialing that is assigned to toll centera.        Zip codeb.       Area codec.        Exchange coded.        Country code

32.     The three digits following the area codea.        Zip codeb.        Bar codec.        Exchange coded.        Country code

33.     Generically refers to any switching system owner or leased by a business or organization to provide both internal switching function and access to the PSTN

a.        Private branch exchangeb.        Public telephone carrierc.        Local exchange carrierd.        Inter-exchange carrier

34.     The point where signals are conveyed from one telecommunication network of a telecom operator to another

a.        Point of interconnectionb.        Signal transfer pointc.        Originating pointd.        Point-to-point

35.     A private line communications channel of the type provided by communication common carrier for linking two or more points together

a.        Party lineb.       Tie linec.        DID lined.        Trunk line

36.     The class of exchange with the primary function is to connect between central offices when a direct trunk is not available

a.        Localb.        Gate wayc.        Tolld.       Tandem

37.     That part of central office or local exchange which refers to all cables and wires extending outward including supporting structures and associated apparatus connected to the subscriber telephone

a.        Outside plantb.        Power plantc.        Inside plantd.        Tandem

38.     Trunk signaling within the operative voice-band spectruma.        In bandb.        Out of bandc.        Channel associatedd.        Common channel

39.     Type of channel signaling where signal travels with the voice channela.        In bandb.        Out of bandc.        Channel associatedd.        Common channel

40.     Type of channel signaling where a completely independent channel carry signals of many traffic channels

a.        In bandb.        Out bandc.        Channel associatedd.       Common channel

41.     Transmission term corresponding to E & M signalsa.        2 wireb.       4 wirec.        8 wired.        16 wire

42.     E & M stands fora.        Ear and mouthb.        Encode and matchc.        Electricity and magnetismd.        Expander and multiplexer

43.     E & M is for interoffice trunk while _____ is for subscriber linea.        Loopb.        4 wirec.        Toned.        Data

44.     It is the means of transferring line or network related control information between telephone and central office or between central office

a.        Signalingb.        Dialingc.        Switchingd.        Multiplexing

45.     A common channel signaling system for use between stored program controlled exchanges, designed for use in digital environment

a.        Signaling system no. 4b.        Signaling system no. 5c.        Signaling system no. 6d.       Signaling system no. 7

46.     To interconnect system of different characteristics by resolving their incompatibilitiesa.        Boundaryb.       Interfacec.        Converterd.        End office

47.     Sampling theorem states that the rate of sampling must at least be _____ the highest frequency component

a.        Halfb.       Twicec.        Equald.        Ten times

48.     Sampling theorem is also known asa.        Shannonb.       Nyquistc.        Nortond.        Thevenin

49.     A process in which more than one signal at a time is translated over a signal link, route or channel

a.        Synchronizationb.       Multiplexingc.        Concentrationd.        Encoding

50.     The modulation technique where signals are sampled periodically and each sample is quantized and transmitted as a digital binary code

a.        TDMb.       PCMc.        PAMd.        PPM

51.     What multiplexing technique is used in PCM?a.        TDMb.        PCMc.        PAMd.        PPM

52.     Geographic area in which telephone services, numbering assignments and rates are the same

a.        Exchange areab.        City blockc.        Regional aread.        Country

53.     When a modulation signal is periodically sampled, a _____ wave is produceda.        TDMb.        PCMc.        PAMd.        PPM

54.     What is the sampling rate used in PCMa.        3.4 kHzb.        4.0 kHzc.        8.0 kHzd.        64 kHz

55.     The process of assigning discrete value to a PAM signals in PCMa.        Samplingb.       Quantizationc.        Equalizationd.        Multiplexing

56.     Continuous one hour period which has the maximum average traffic intensitya.        Busy hourb.        Traffic quantityc.        Grade of serviced.        Erlang

57.     The aggregate engagement time or occupancy time of one or more traffic paths

a.        Busy hourb.       Traffic quantityc.        Grade of serviced.        Erlang

58.     A measure of the probability that a call offered to a group of trunks or circuits will fail to find idle circuit at the first attempt

a.        Busy hourb.        Traffic quantityc.        Grade of serviced.        Erlang

59.     The consultative body with the primary purpose of promoting compatibility between communications practices and performance standards of various nations in the field of telephony and telegraphy

a.        CCITTb.        CCIRc.        FCCd.        IEEE

60.     Using a cellular phone outside your home service areaa.        Long Distance Communicationsb.       Roamingc.        Global Communicationsd.        Jamming

61.     What is the meaning of AMPS which is the standard for analog cellular telephones?a.        Advanced Mobile Phone Serviceb.        Automatic Mobile Phone Systemc.        Analog Mobile Passband Systemd.        Amplitude Mixing Phone Standard

62.     The time spent on a cellular phone which is usually billed to the subscriber on a per minute system.

a. Time division systemb. Airtimec. Durationd. Interval

63.     Channel is known as the width of the spectrum band taken up by a radio signal which is measured in kilohertz (kHz). What is the width of the channel used by most analog cellular phones?

a. 50 kHzb. 60 kHzc. 40 kHzd. 30 kHz

64.     A digital technology that uses a low power signal spread across a wide bandwidth. With this technology, a phone call is assigned a code instead of a certain frequency. Using the identifying code and a low power signal, a large number of callers can use the same group of channels.

a.        Time Division Multiple Accessb.        Pulse Code Division Multiplexingc.        Pulse Multiple Accessd.       Code Division Multiple Access

65.     A central computer that connects a cellular phone call to the public telephone network. It controls the entire system’s operation, including monitoring calls, billing and handoffs.

a.           Personal Communications Servicesb.           Wide Area Network Computerc.           Mobile Telephone Switching Officed.           International Standards Organization

66.     What is the meaning of IS-54 which is the dual mode (analog and digital cellular standard in North America? In the analog mode, this conforms to the Advanced Mobile Phone Service.

a. Interim Standard Number 54b. International Standard Number 54c. Integrated Systems Number 54d. Industry Standard Number 54

67.     A phone that operates on both analog and digital networks.a. Dual systemb. Coupled systemc. Paired-mode systemd. Dual-mode system

68.     The geographic area by a single low-power transmitter/receiver. It categorizes a cellular system’s service area.

a. Channelb. Service areac. Sited. Cell

69.     Radio frequencies assigned in one channel in a cellular system are limited to boundaries of a signal cell because of their low power. The carrier is free to use the frequencies again in other cells in the system without causing interference. What do you call this method?

a. Frequency assignmentb. Channel utilizationc. Frequency reused. Optimum frequency assignment

70.     A loosely defined future universal telecommunications service that will allow “anytime, anywhere” voice and data communication with personal communication devices.

a. Personal Communications Systemb. Universal Telephone Servicec. Personal Handy Phoned. Nationwide Communication Services

71.     A special fee that local telephone companies are allowed to charge all telephone customers for the right to connect with the local phone network.

a. Airtime feeb. Access feec. Connection feed. Mandatory fee

72.     A means of increasing the capacity of a cellular system by subdividing or splitting cells into two or more smaller cells.

a. Spectrum allocationb. Cell allocationc. Channel splittingd. Cell splitting

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

a. Wireless decoderb. Cellular decoderc. Encryptiond. Decoder

74.     An important safety feature that’s included with most of today’s car phones. It permits the driver to use his cellular car phone without lifting or holding the handset to his ear.

a. Hands-freeb. Hands-offc. Handy phoned. Safety phone

75.     A cellular phone feature that automatically blows the car’s horn if a call comes in, alerting the recipient standing nearby.

a. Alert modeb. Warning hornc. Call hornd. Alert mode

76.     An important feature of a cellular phone subscribing of a voice mail which indicates a light or other indicator announcing that a phone call came in.

a. Alert modeb. Call alertc. Message alertd. Voice mail alert

77.     A sophisticated service provided by a cellular carrier that automatically transfers an incoming cellular call to another phone number if the cellular subscriber is unable to answer.

a. Call forwardingb. Call transferc. Call waiting

d. No-answer transfer78.     The periods of time during which the carriers offer discounted airtime charges,

usually available after 10 p.m. and before 6 a.m., on weekends and holidays.a. Night timeb. Lean timec. Off-peakd. peak

79.     The standard cellular antenna for a car which prefers to the spring-like section in the lower third of the antenna known as a phasing coil.

a. Pigtail antennab. Omnidirectional antennac. Whip antennad. Flexible antenna

80.     The type of cellular phone which is installed in a car or truck. This unit is attached to the vehicle, draws its power from the vehicle’s battery and has an external antenna.

a. Mobile or car phoneb. Portablec. Electronic phoned. Enhanced cellular phone

81.     A protected database that holds a copy of the secret key stored in each subscriber’s SIM card

a.        HLRb.        VLRc.        AuCd.        EIR

82.     The time which a cellular subscriber uses a carrier’s service charged per unit time of call

a. Talk timeb. Air timec. Stand-by timed. Hand off time

83.     The Subscriber’s Identity Module (SIM) Card for GSM contains a/n _____ number that identifies the user to the network along with other user and security information.

a. IMEIb. IMSIc. ESNd. MIN

84.     The modulation technique in cellular communications wherein each message is assigned with a frequency, which is unique to a particular cell.

a.        NBFMb.        NBDTc.        PCMd.        Modem

85.     A channel used for the transmission of supervisory information from a cell site to a mobile station or vice versa.

a. Speechb. Controlc. Commond. Voice

86.     The database for good and known IMEI’sa.        Whiteb.        Blackc.        Greyd.        red

87.     A means of increasing the capacity of a cellular system by subdividing cells into two or more smaller cells.

a. Spectrum allocationb. Cell allocationc. Channel splittingd. Cell splitting

88.     A database used for management of mobile subscriber.a. HLRb. VLRc. MSCd. EIR

89.     The following are the supervisory audio tones used in cellular phones excepta.        5970 Hzb.        6000 Hzc.        6030 Hzd.       3925 Hz

90.     A special signal tone that is transmitted to the cell site to free the voice channel when the mobile terminates a cell.

a. 10 KHzb. 20 KHzc. 30 KHzd. 25 KHz

91.     In the CDMA Cellular technology, the signal meant for a given user is tagged with a distinctive _____ pattern that only the user’s receiver can recognize.

a. PIN Codeb. PN Codec. SIMd. IMSI

92.     In a Cellular network, if you  split a cell originally containing a maximum of  20 channels into two cells, the theoretical total channel capacity is

a. 10b. 20c. 30

d. 4093.     In wireless communications, a radio channel consists of _____ frequencies within the

RF spectrum, which allow a cell site and a wireless phone to transmit and receive signals simultaneously.

a. 2b. 3c. 4d. 5

94.     A GSM security measure which is designed to prevent eavesdropping of user data on the radio path

a. IMSIb. TMSIc. IMEId. MSRN

95.     The uplink frequency range for GSM900a. 935 – 960 MHZb. 890 – 915 MHzc. 935 – 960 MHzd. 890 – 915 MHz

96.     The geographic area served a single-power transmitter/receiver. It categorizes a cellular system’s service area.

a. Channelb. Service areac. Sited. cell

97.     Best described as an amplifier used in radio telephony.a. Class Ab. Class Bc. Class Cd. Magnifier

98.     This is the Nordic analog mobile radio telephone system originally used in Scandinavia.

a.        NMTb.        GSMc.        PCNd.        PCS

99.     It is a one-way wireless messaging which allows continuous accessibility to someone away from the wired communications network.

a.        Pagingb.        Trunked Radioc.        Cellular Telephonyd.        Text Messaging

100.  The following are parts of the Trunked Radio System excepta. Channels

b. Central controllerc. Antenna and towerd. 48 volts power supply