Telephone Definitions

Question 1

Mixed signals are an _________ with digital transmissions

Answer 1

advantage

Question 2

a structure which is mounted in the entrance facility and/or equipment room to guard against damage to the CO equipment from outside sources such as power surges or lightning is known as _________

Answer 2

protectors

Question 3

a printed circuit board with a special connector edge that allows the board to be plugged into a slot on a back plate is called ________

Answer 3

card

Question 4

the connection between the public switched network and customer premises equipment and or a generic term for firms that sell install and service subscriber equipment is known as

Answer 4

interconnected

Question 5

the part of the telephone microphone which converts sound-waves of the speakers into electrical energy is known as the

Answer 5

transmitter

Question 6

a unit of information in binary which represents one of two states of information, either a 1 or 0, as apposed to a decimal figure is referred to as a__________

Answer 6

bit

Question 7

a switch located within a telephone set alerts the switching equipment that a caller has initiated a call or that the caller has finished and the parties have disconnected. it operates when the user removes the handset from the telephone (off-hook) or returns the handset to the telephone (on-hook) is known as________

Answer 7

hookswitch

Question 8

a location identifier enabling messages to be sent and received to a particular person or station is know as

Answer 8

address

Question 9

a unit used for temporary storage of data; a storage element which may be written into or read out from any memory address, or at any point in time is known as ________

Answer 9

RAM random access memory

Question 10

the term for a time period enclosing a character a character group or bit group involved in a digital carrier system is a ____________

Answer 10

frame

Question 11

the point of access into a communications system, computer, network or other electronic device is known as ________

Answer 11

port

Question 12

in data communications a bit added to a group of bits so that the number of 1s in the group is always odd or even. used on a byte by byte basis to verify the integrity of data transmission. the receiving end of the transmission must be prepared for the same type of _______ (odd/even) that is being sent

Answer 12

parity

Question 13

a type of transmission facility that uses radio frequencies between 1,000 and 20,000 megahertz extensively used for TV transmission and by some long distance carriers is known as_______

Answer 13

microwave

Question 14

a trunk connecting a subscribers telephone equipment to a central office other than the local central office is________

Answer 14

Foreign exchange trunk

Question 15

name three types of protectors

Answer 15

fuse, airgaps, rare gas

Question 16

what is the factor by which LEC’s determine responsibility for repair and maintenance

Answer 16

demarcation point

Question 17

what does COS stand for

Answer 17

class of service

Question 18

refers to the capability of fully charged battery cells to carry the power load of a system when commercial power fails and the primary power source is inoperative is known as_________

Answer 18

battery backup

Question 19

a series of digits or characters that must be entered into a system such as a telephone or other communication terminal to gain access is know as __________

Answer 19

access code

Question 20

an application of ISDN which, by combining two or more B channels allows improved motion for video is known as _______

Answer 20

video conferencing

Question 21

subscribers to ________ that are behind the same system can all call each other as if they were extensions allowing for the transferring of calls

Answer 21

centrex services

Question 22

the number of cycles completed per unit of time measured in Hertz is ________

Answer 22

frequency

Question 23

an independent federal agency responsible for regulating interstate and foreign telecommunications is known as _________

Answer 23

FCC

Question 24

what does DTMF stand for

Answer 24

Dual tone multi frequency

Question 25

a data communications transmission rate based on the number of signal level changes per second, regardless of the information content of those signals is known as________

Answer 25

baud rate

Question 26

a special program built into a system to control the hardware and software resources and to supervise the running of other programs is known as________

Answer 26

operating system

Question 27

a ________ is usually 8-bits and represents a single character.

Answer 27

byte

Question 28

a storage device within a computer system that compensates for a difference in the rate of data flow when transmitting data from one device to another is know as _____________

Answer 28

buffer

Question 29

a method of organizing speech samples into a single communication path by interleaving them into time slots is known as

Answer 29

time division multiplexing.

Question 30

A key system that replaces electromechanical relay controls with electronic devices; four or six conductors per telephone replace bulky multiple cables is known as__________

Answer 30

EKTS electronic key telephone set

Question 31

cabinet which contains the control modules associated with the key telephone systems; usually electromechanical relay units or electrical printed circuit cards

Answer 31

Key service unit (KSU)

Question 32

to momentarily depress and release a telephone hook-switch in order to signal a request for a feature such as a conference or transfer is known as _______

Answer 32

hook flash

Question 33

what is a type of signaling in telephone switching systems that uses direct current in a ground return path to indicate a subscriber’s request for service

Answer 33

ground start

Question 34

this provides centralized telecommunications services to tenants in a building or complex. Also exists in large shopping centers and high rises

Answer 34

Shared tenant services

Question 35

a junction box on the side of a house where tip and ring connect to the outside network is known as_______

Answer 35

NID

Question 36

the difference in hertz between the highest and lowest frequency of a group or band of frequencies is known as _________

Answer 36

bandwidth

Question 37

an individual person or company who has a telephone number in their name is known as a

Answer 37

subscriber

Question 38

a device that combines two or more signals for transmission over the same path is known as _______

Answer 38

Multiplexer unit MUX

Question 39

carriers who provide telephone service within their franchise area are known as LECs what does this stand for__________

Answer 39

local exchange carriers

Question 40

the part of the telephone which converts electrical energy back to voice is known as the

Answer 40

receiver

Question 41

a method of signaling where the amplitude or frequency of the electrical signal is analogous to the source, is known as ___________

Answer 41

analog transmission

Question 42

a wiring board used in microcomputers and mini computers to provide connections between logic, memory, and input/output modules is known as________

Answer 42

backplate

Question 43

a guideline platform for upgrading global telephone communications to a completely digital switched network , simultaneous transmission of voice and data over multiplexed communications circuits is _________

Answer 43

integrated services digital network (ISDN)

Question 44

one of the local telephone exchange areas which serve to distinguish local phone service from long distance service is____________

Answer 44

Local access and transport area