Toa EXES-6000, Эксплуатация и устранение неисправностей

Страница: 55 / 60

BASEBAND SIGNALING
Transmission of a signal at its original frequencies, i.e., a signal not changed by modulation.
BUS
A transmission channel for data from one of several sources to one of several destinations. Only one
transmission via the bus is possible at the time.
CARRIER
A continuous frequency capable of being modulated, or impressed with a second (information carrying)
signal.
CL (Conference Link Unit)
Operates under the control of the HC unit to connect or disconnect the links for conversation among up to
4 parties and conversation between 2 parties. One CL unit is provided with 1 conference link and 2 speech
links.
CP (Central Processing Unit)
Reads out the exchange procedures written into the memory (ROM) and collates the data from stations
for processing in succession.
CROSS-BAR SWITCH
A switch having a plurality of vertical paths, a plurality of horizontal paths, and electromagnetically
operated mechanical means for interconnecting any one of the vertical paths with any of the horizontal
paths.
CROSS-BAR SYSTEM
A type of line-switching system which uses cross-bar switches.
DL (Duplex Link Unit)
Operates under the control of the HC unit to connect or disconnect the individual links for conversation
between two stations, changing over from the hands-free conversation to the full duplex conversation
mode, or vice versa.
DUPLEX CONVERSATION SYSTEM
At any two stations in a Private Branch Exchange (PBX) system and an Intercom System mutual
outgoing/incoming and private conversation are possible.
— 55 —
GLOSSARY