The Public Telephone Network Flashcards
identifies and connects the subscriber to a suitable transmission path
switching functions
supply and interpret control and supervisory signals needed to perform the operation
signaling functions
any device used to originate and terminate calls and to transmit and receive signals into and out of the telephone network
Instrument or station equipment
central location where subscribers are interconnected, either temporary or on a permanent basis
Exchange
the first local telephone exchange were ___, where manual interconnects were accomplished using patchcords and jacks
patch panel or boards / switchboards
Each telephone line could have more than 10 or more subscribers connected to the CO using the SAME local loop
Party Lines
is a system of sensors, switches and other electrical and electronic devices that allows subscriber to give instructions directly to the switch without having to go through an operator
automated switching system
is a programmable matrix that allows circuits to be connected to one another
circuit switch
Exchanges that connect directly to the local loop
local exchange or central office
A telephone call completed within a single local exchange
intraoffice call or intraswitch call
calls placed between 2 stations that connected to a different local exchange or CO
Interoffice calls or interswitch calls
special facilities used for CO to CO connection
Trunk or interoffice trunk
is an exchange w/o any local loops connected to it
tandem office
only facilities connected to switching machines in a tandem office
trunks
other terms for tandem switches
tandem trunks or intermediate trunks
