ADTRAN 25 manual Glossary

GLOSSARY

Central Office Codes

The first three digits of a 7-digit public network telephone number. These codes are numbered from 200 through 999 and are sometimes referred to as NNXS.

Central Office Trunk

A telecommunications channel that provides access from the system to the public network through the local central office (CO).

C h a n n e l

A communications path for transmitting voice and data.

Class of Service (COS)

Parameters used to define voice terminal, data, and trunk port capabilities and restrictions.

Common Control Switching Arrangement (CCSA)

A private telecommunications network using dedicated trunks and a shared switching center for interconnecting company locations.

Confirmation Tone

Three short bursts of tone followed by silence; indicates that the feature has been activated, deactivated, or canceled.

C o n s o l e

See Attendant Console.

C o v e r a g e C a l l

A call that is redirected from the called station to an alternate answering position.

C o v e r a g e P a t h

The order in which calls are redirected to alternate answering positions.

G-4