Telephone Definitions Flashcards
Mixed signals are an _________ with digital transmissions
advantage
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 _________
protectors
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 ________
card
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
interconnected
the part of the telephone microphone which converts sound-waves of the speakers into electrical energy is known as the
transmitter
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__________
bit
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________
hookswitch
a location identifier enabling messages to be sent and received to a particular person or station is know as
address
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 ________
RAM random access memory
the term for a time period enclosing a character a character group or bit group involved in a digital carrier system is a ____________
frame
the point of access into a communications system, computer, network or other electronic device is known as ________
port
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
parity
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_______
microwave
a trunk connecting a subscribers telephone equipment to a central office other than the local central office is________
Foreign exchange trunk
name three types of protectors
fuse, airgaps, rare gas
what is the factor by which LEC’s determine responsibility for repair and maintenance
demarcation point
what does COS stand for
class of service
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_________
battery backup
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 __________
access code
an application of ISDN which, by combining two or more B channels allows improved motion for video is known as _______
video conferencing
subscribers to ________ that are behind the same system can all call each other as if they were extensions allowing for the transferring of calls
centrex services
the number of cycles completed per unit of time measured in Hertz is ________
frequency
an independent federal agency responsible for regulating interstate and foreign telecommunications is known as _________
FCC
what does DTMF stand for
Dual tone multi frequency
