Nortel 1000 Features And Services Fundamentals page 435

If the system initializes while an outgoing call originating from an analog line
is established and battery reversal is activated, unprotected data for the
call is lost. In this case, battery reversal remains activated when the call is
cleared down by either party. However, the line status is reverted to normal
when the next outgoing call is answered and then cleared down.
If the hook flash timer is set equal to or greater than the on-hook timer,
activation of the hook flash disconnect signal also causes the card to send
an on-hook message and then an off-hook message to the system. In this
case, if the user remains off-hook after the far end disconnects, dial tone
is received and an outgoing call can be initiated.
Battery reversal supervision is supported on the following cards:
•
•
•
Hook flash disconnect supervision is supported on the following cards:
•
•
Feature interactions
Call Transfer
If more than one active call is extended to an analog line, the call type
associated with an analog line is determined by the first active call. The call
type is assumed to be incoming and hook flash supervision applies if a
terminal device answers an incoming call from an idle state. If the terminal
device performs a switch hook flash to put the first party on hold and
initiates a consultation call, the Battery Reversal feature is not supported;
no battery reversal answer signal is extended to the terminal device when
the second party answers.
If the first party disconnects while the terminal device is connected to
the second party, no disconnect supervision is extended to the terminal
device. However, hook flash disconnect supervision is extended to the
terminal device when the second party disconnects (that is, a disconnect
supervision signal is sent only when the last party connected to the terminal
disconnects).
If a terminal device originates an outgoing call, battery reversal answer
supervision is extended when the called party answers. The polarity of the
line remains reversed when the terminal device performs a switch hook
flash and then initiates a consultation call to a second party. The analog
Copyright © 1994–2008, Nortel Networks
.
The Enhanced Extended Analog Line Card for China NTRA08AA or
later vintage.
The Off-Premise Station Line Card NT1R20AB or later vintage, and
The Off-Premise Station Line Card for China NTRA06AB or later vintage.
The Off-Premise Station Line Card NT1R20AB or later vintage, and
The Off-Premise Station Line Card for China NTRA06AB or later vintage.
Nortel Communication Server 1000
Features and Services Fundamentals — Book 2 of 6 (C)
NN43001-106 02.04 Standard
Release 5.5 9 May 2008
Feature interactions 435