Administrator's Guide

Busy indicator
Issue 5 October 2002 1521555-233-506
Busy indicator
The Busy Indicator button provides multiappearance telephone users and
attendants with a visual indicator of the busy or idle status of one of the following
system resources:
■ An extension number
■ A trunk group
■ A terminating extension group
■ A hunt group—either DDC or UCD
■ Any loudspeaker paging zone, including all zones
The Busy Indicator button provides the attendant or user with direct access to the
extension number, trunk group, or paging zone.
You can assign extension numbers, trunk group access codes, and Loudspeaker
Paging access codes to a Busy Indicator button.
The Facility Busy lamp indication for a VDN does not light when the VDN is
being used. The associated button may be used to place a call to a VDN.
Busy tone disconnect
In some regions of the world the CO sends a busy tone for the disconnect
message. With Busy Tone Disconnect (BTD), the switch disconnects analog
loop-start CO trunks when a busy tone is sent from the CO.
A call that is originated from or terminated to a phone using a BTD enabled trunk
has a Call Classifier port connected to the trunk. The Classifier port connects, then
the call is answered and stays connected on the trunk until the station hangs up or
a BTD signal is received from the CO. If there is only one BTD trunk on a call
when the BTD signal is received, the call is dropped. If it is a conference call, only
the trunk is dropped and the rest of the parties stay connected.
Interactions
■ Answer supervision
If Answer supervision is enabled, set the Answer supervision timeout field
to
0 (zero).