Instruction manual

Page 1020 of 3156 China – Supervised Analog Lines
553-3001-306 Standard 10.00 January 2002
• The Off-Premise Station Line Card NT1R20AB or later vintage, and
• The Off-Premise Station Line Card for China NTRA06AB or later
vintage.
Hook flash disconnect supervision is supported on the following cards:
• The Off-Premise Station Line Card NT1R20AB or later vintage, and
• The Off-Premise Station Line Card for China NTRA06AB or later
vintage.
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 (i.e., 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 line is
reverted to normal polarity when the terminal device completes the transfer
and drops out or when the last of either the held party or the consultation party
disconnects.