Instruction manual

GLOSSARY
L
Link
A transmitter-receiver channel or system that connects two locations.
Listed Directory Number
A LDN is a publicly listed telephone number for an organization. These numbers are
administered as special extensions, each associated with a 15-character name. DID for
any of these extensions causes routing of the call to the attendant group with the ter-
minating attendant display indicating an LDN call and the name associated with the
dialed extension.
Local Clock
The tone/clock circuit pack that has a local oscillator that can be used to maintain timing
for the switch if DS1s are not used or if both DS1 primary and secondary clock refer-
ences fail.
Lookahead Interflow
Lookahead Interflow is an enhancement to Call Vectoring that checks the status of
remote ACD locations that calls may be interflowed to. For example, calls under vector
control will not interflow to a remote ACD location that is not accepting calls. This capa-
bility will be provided via the use of a private or public network ISDN-PRI connection with
the receiving switch having the capability to reject or accept the call.
Loop-Start Trunk
After establishing a connection with the distant switching system for an outgoing call, the
system waits for a signal on the loop formed by the trunk leads before sending the digits
of the called number. On incoming calls, the received request for service is sufficient to
cause the call to route to a predetermined destination, normally the system attendant
group. No digits are received.
M
Main/Satellite/Tributary
A Main switch provides: interconnection, via tie trunks, with one or more subtending
switches, called Satellites; all attendant positions for the Main/Satellite configuration; and,
access to and from the public network. To a user outside the complex, a Main/Satellite
configuration appears as a single switch, with a single LDN. A Tributary is a switch, con-
nected to the Main via tie trunks, but which has its own attendant position(s) and its own
LDN.
G-17