Instruction manual

GLOSSARY
Bridged Appearance
A call appearance on a voice terminal that matches a call appearance on another voice
terminal for the duration of a call.
Buffer
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.
Bus
A multi-conductor electrical path used to transfer information over a common connection
from any of several sources to any of several destinations.
Bus, Time Division Multiplex
See Time Division Multiplex Bus.
Business Communications Terminal
An advanced series of semi-intelligent terminals.
Bypass Tie Trunks
One-way, outgoing tie trunks from a tandem switch to a main switch in an Electronic Tan-
dem Network (ETN). These trunks, provided in limited quantities, are used as a ‘‘last-
choice’’ route when all trunks to another tandem switch are busy. Bypass tie trunks are
used only if all applicable intertandem trunks are busy.
Byte
A sequence of bits, 8 bits long, that is usually shorter than a word. A word is 16 bits
long.
C
Call Appearance, Attendant Console
Six buttons, labeled a through f, used to originate, receive, and hold calls. Each button
has two associated lamps to show the status of the call appearance.
Call Appearance, Voice Terminal
A button labeled with an extension number used to place outgoing calls, receive incoming
calls, or hold calls. Two lamps next to the button show the status of the call appearance
or status of the call.
163