74 List of terms
co
Central Office.
CPU
Central Processing Unit.
Common equipment (CE)
A hardware subsystem that houses one or more Central Processing Units
(CPUs), memory circuits, mass storage devices, and service circuits.
Configuration
A group of machines (hardware) which are interconnected and are
programmed to operate as a system.
Data Terminal Equipment (DTE)
Equipment or devices which are capable of transmitting and/or receiving
data signals over a communications network commonly called a business
machine.
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dB
Decibel
DCHI
D-Channel Handler Interface.
Diagnostic programs
Software routines used to test equipment and pinpoint faulty components.
Digital
A process which models information as discrete values of some parameter
such as voltage, current, or phase. Compare with analog.
Digital Multiplex Switching System (DMS)
A family of switching systems using new technology that provides digital
circuit switched service for voice and data transmission. DMS is
characterized by the use of pulse code modulation (PCM) and time division
multiplexing (TDM) throughout the switched network. The system allows
the direct switching of PCM signals without their conversion to analog
format.
System overview 553-3001-l 00