Instruction manual

GLOSSARY
Tone/Clock
The Tone/Clock circuit pack provides tone generation and timing for the TDM bus. The
active Tone/Clock circuit pack is currently providing service for the cabinet in a duplicated
system whereas the standby tone/clock is a backup circuit pack in the event the active
tone/clock fails.
Tone Ringer
A device with a speaker, used in electronic voice terminals to alert the user.
Trunk
A telecommunications channel between two switching systems.
Trunk Data Module
Provides the required interface between the system and a data set (modern) or data ser-
vice unit connected to a private or switched data line.
Trunk Group
Telecommunications channels assigned as a group for certain trunking functions.
U
Uniform Dial Plan (UDP)
A feature that allows a unique 4- or 5-digit number assignment for each terminal in a
multi-switch configuration, such as a DCS or Main/Satellite/Tributary configuration.
Unrestricted Call List
A list of digit strings that can be accessed by a user.
V
Vector Controlled Split
A hunt group or ACD split is vector controlled when the field “Vector” is enabled on the
Hunt Group form. Only vector-controlled hunt groups or vector-controlled ACD splits are
accessible via the vector commands “queue to main” and “check backup”.
Vector Directory Number (VDN)
A number that can be dialed to access a vector. Several VDNs may map into the same
vector.
G-27