Glossary
802.3
is an IE EE stan dard for LANs, tha t defi ne s the ph ysical l ayer as coax or un shie l de d
twisted pair and the MAC (medium access co ntrol) laye r as CSMA/CD (carrier-sen se
multiple access with collision detection).
802.5
is an IEEE standard for LANs, that defines the physical layer as shielded twisted pair
and the MAC (medium access control) layer as Token Ring.

A

Address
is a coded representation of the destination of a message.
Alarm
see “Event.”
ACELP
Stands for Algebraic Code Excited Linear Predictive, which is a type of voice com-
pression algorithm that can be configured for SmartSwitch 1800 Voice ports.
ARP
stands for Add ress Re s o lutio n Proto c ol, whic h dyna mi c ally ma ps netw ork addre sses
to MAC addresses.
ASCII
stands for American Standard Code for Information Interchange.
ASCII termina l
is a VT100 or compatible video display terminal.
Async
stands for “asynchronous.”
Asynchronous
describes terminals, printers, and other devices that transmit data in a discontinuous
character stream; it also describes the protocol used to interconnect such devices.
ATC
Stands for Adaptive Sub-band Transform Coding, which is a type of voice com-
pression algorithm that can be configured for SmartSwitch 1800 Voice ports.
Auxiliary Con sole
is an async terminal connected to the Console port in a SmartSwitch 1800, and acti ng
as an operator console.