Deck 14: More on Telecommunications

Question 1

ATM provides quality-of-service for voice.

Answer 1

True

Question 2

SONET-SDH applies ________ when there is a break in a trunk line between switches.

A)the Spanning Tree Protocol
B)wrapping
C)half-duplex transmission
D)full-duplex transmission

Answer 2

B

Question 3

PSTN signaling in the United States uses ________.

A)Signaling System 7
B)ATM
C)TDM
D)SIP
E)Both b.and c.

Answer 3

A

Question 4

A ring topology is attractive because it brings ________.

A)higher speed
B)lower cost
C)greater reliability
D)All of the above.

Question 5

Because of the curvature of the earth,microwave systems that must travel over long distances need ________.

A)to operate at low frequencies
B)to operate at high frequencies
C)repeaters
D)reflectors
E)Both a.and d.

Question 6

Which of the following is good for mobile stations?

A)GEOs.
B)LEOs.
C)Both A and B
D)Neither A nor B

Question 7

In TDM,time is first divided into brief periods called ________.

A)packets
B)frames
C)slots
D)cells
E)All of the above.

Question 8

Satellite ________ operate on a point-to-point basis.

A)uplinks
B)downlinks
C)Both A and B
D)Neither A nor B

Question 9

Cross-connect devices are found in ________.

A)PBXs
B)equipment rooms
C)telecommunications closets
D)switches

Question 10

Plenum wiring is needed for ________.

A)heavy traffic loads
B)safety
C)Both A and B
D)Neither A nor B

Question 11

________ is widely used in Europe for PSTN signaling.

A)C7
B)SS7
C)Both A and B
D)Neither A nor B

Question 12

Which of the following is packet-switched?

A)ATM.
B)TDM.
C)Both A and B
D)Neither A nor B

Question 13

SONET-SDH uses a ________ topology.

A)point-to-point
B)hierarchy
C)mesh
D)ring

Question 14

In telephone wiring,there needs to be four wires for each computer on the floor in ________.

A)horizontal distribution
B)vertical distribution
C)Both A and B
D)Neither A nor B

Question 15

In data wiring,there needs to be four wires for each computer on the floor in ________.

A)horizontal distribution
B)vertical distribution
C)Both A and B
D)Neither A nor B

Question 16

In TDM,there are more frames than slots.

Question 17

Incompatibilities between signaling systems in the United States and Europe cause serious problems.

Question 18

Which of the following is NOT one of the three categories of PBX services?

A)Attendant services.
B)Management services.
C)Advanced services.
D)User services.

Question 19

In TDM,a voice conversation gets the same ________ in each ________.

A)frame,packet
B)packet,frame
C)frame,slot
D)slot,frame

Question 20

Which of the following has an altitude of a few thousand miles?

A)GEOs.
B)LEOs.
C)MEOs.
D)None of the above.

Question 21

Call restriction refers to a switch's ability to control incoming calls to a station.

Question 22

For PBXs,camp-on is ________.

A)a user service
B)an attendant service
C)a management service

Question 23

Which of the following was set up primarily to provide long-distance telephone service after the breakup of the Bell System in the early 1980s?

A)AT&T.
B)RBOCs.
C)Both A and B
D)Neither A nor B

Question 24

Message units are a time and distance pricing method that can be used to charge for local calls.

Question 25

For PBXs,nighttime calling is ________.

A)a user service
B)an attendant service
C)a management service

Question 26

For PBXs,call detail reporting is ________.

A)a user service
B)an attendant service
C)a management service

Question 27

In the United States,telephone customers can connect to a(n)________ carrier to receive telephone service.

A)ILEC
B)CLEC
C)Either A or B
D)Neither A nor B

Question 28

Which of the following is an advanced carrier telephone service?

A)Voice mail
B)Caller ID.
C)Both A and B
D)Neither A nor B

Question 29

PTTs were found in ________.

A)Europe
B)the United States
C)Both A and B

Question 30

Which of the following would a mail order company's customers prefer?

A)900 number service.
B)800 number service.
C)WATS.
D)All of the above.

Question 31

With WATS calls,the ________ pays and pays ________ per minute than direct distance dialing.

A)caller,more
B)caller,less
C)called party,more
D)called party,less
E)caller,the same

Question 32

In the United States,telephone customers can connect to a(n)________ carrier to receive telephone service.

A)ILEC
B)LATA
C)Both A and B
D)Neither A nor B

Question 33

With 888 numbers,the ________ pays and pays ________ per minute than direct distance dialing.

A)caller,more
B)caller,less
C)called party,more
D)called party,less
E)caller,the same

Question 34

For PBXs,call transfer is ________.

A)a user service
B)an attendant service
C)a management service

Question 35

A ________ provides telephone service to customers.

A)PTT
B)Ministry of Telecommunications
C)Both A and B
D)Neither A nor B

Question 36

Even for local calls,many telephone companies charge by the duration of the call.

Question 37

Local calls are always billed on a flat rate basis where the customer pays a monthly fee for unlimited local calling.

Question 38

For PBXs,call forwarding is ________.

A)a user service
B)an attendant service
C)a management service

Question 39

Which of the following regulates intrastate telephony in the United States?

A)The FCC.
B)PUCs.
C)Neither A nor B

Question 40

With 900 numbers,the ________ pays and pays ________ per minute than direct distance dialing.

A)caller,more
B)caller,less
C)called party,more
D)called party,less
E)caller,the same

Question 41

In the United States,which of the following is a carrier?

A)ILEC.
B)LATA.
C)Both A and B
D)Neither A nor B

Question 42

In the United States,________ handle long-distance communication.

A)ILECs
B)IXCs
C)Both A and B
D)Neither A nor B

Question 43

ICCs provide telephone transmission service ________.

A)within LATAs
B)between LATAs
C)between different countries
D)All of the above.

Question 44

Deregulation is highest for ________.

A)customer premises equipment
B)local telephone service
C)long-distance telephone service
D)All of the above are deregulated to about the same degree.

Question 45

In the United States,IXCs provide telephone transmission service ________.

A)within LATAs
B)between LATAs
C)between the United States and another country
D)All of the above.

Question 46

Within a LATA,ILECs and CLECs interconnect at ________.

A)access points
B)NAPs
C)POPs
D)IXCs
E)switches

Question 47

Deregulation is lowest for ________.

A)customer premises equipment
B)local telephone service
C)long-distance telephone service
D)All of the above are deregulated to about the same degree.