Trunk Mode; Ans Mode - Nortel ICS Install Manual

Trunk mode

Trunk mode allows you to specify either disconnect
supervision or unsupervised. Disconnect supervision, also
referred to as loop supervision, releases an external line when
an open switch interval (OSI) is detected during a call on that
line. This prevents the line from remaining unavailable for
other Norstar users.
Press CHANGE to select the setting: Unspr or Super.
Unspr (the default) turns disconnect supervision off for the
•
line.
Super assigns supervised mode, if supported by the line.
•
otherwise, the line functions as unsupervised.
Tips -
Norstar disconnects a call is programmed by the Discon
timer setting under Hardware.
Disconnect supervision is required for loop start trunks to
operate in auto-answer mode or with DISA. It is also required
to conference with two external callers. The line must be
equipped with disconnect supervision from the central office
for the Super option to work.

Ans mode

The Answer mode setting appears on the display during
programming for loop start and BRI lines with a Trunk mode
setting of Super, for groundstart (T1) lines, and for E&M
lines. Press CHANGE to select the setting: Manual or Auto.
Tips -
an E&M card for the DTMF receivers to function properly.
N0130943 02
The duration of an open switch interval (OSI) before
If loop start lines are set to Auto, you will require
Lines / 369
Modular ICS 7.1 Installer Guide