Northern Telecom 3X8 Owner's Handbook Manual page 227

Unsupervised line: A line for
which disconnect supervision is
disabled. If an external caller
hangs up, the system
does not detect the
disconnection and does not
hang up its line. See Disconnect
Supervision.
User Filter: See Dialing filter.
PO842627 01
Glossary
V
Voice Call: A feature you can
use to make an announcement
or begin a conversation through
the speaker of another
telephone in the
system. The telephone you call
does not ring. Instead, the
person you call hears a beep
and then your voice. Their
telephone beeps periodically to
remind them that their
microphone is on.
DR5.1 Owner's Handbook
223