AT&T System 75, Wiring Diagram

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CHAPTER 6. GLOSSARY
CHAPTER 6. GLOSSARY
Note: A complete glossary for System 75 is contained in the AT&T
System 75 Reference Manual—System Description, (555-200-200).
Asynchronous Data Transmission
A scheme for transmitting data where each character is preceded by
a start bit and followed by a stop bit, thus permitting data elements
to occur at irregular intervals. This type transmission is advantageous
when transmission is not regular (characters typed at a keyboard).
Asynchronous Data Unit (ADU)
A data communications equipment (DCE) type device that allows
direct connection between RS-232C equipment and the digital
switch.
Applications Processor (AP)
A minicomputer used to support several user-controlled applications
such as traffic analysis and electronic documentation.
Attendant Console
An electronic call-handling position with pushbutton control. Used by
attendants to answer and place calls and to manage and monitor
some of the system operations.
Audio Information Exchange (AUDIX)
A unit that provides voice mail service to users.
Bridging
Thee sharing of the same extension by two or more voice terminals.
Central Office (CO)
The location housing telephone switching equipment that provides
local telephone service and access to toll facilities for long-distance
calling.
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