GLOSSARY
B u f f e r
A circuit or component that isolates one electrical circuit from another. Typically, a buffer holds data from one circuit or process until another circuit or process is ready to accept the data.
B u s
A multiconductor electrical path used to transfer information over a common connection from any of several sources to any of several destinations.
Bus,
See
Call Appearance
A button on a multiline voice terminal at which a call seems to appear. Calls may be received, originated, and held at an appearance. System Access, Personal Lines, Direct Extension Selection, and Pooled Facilities are examples of call appearances. Software makes it seem to the terminal user that a line actually is terminated at the button.
Call Appearance, Voice Terminal
A button labeled with an extension number or line number used to place outgoing calls, receive incoming calls, or hold calls. Two
CCS (Hundred Call Seconds)
A
Erlang).
Central Office
The location housing telephone switching equipment that provides local telephone service and access to toll facilities for
