•
night service;
•
call extension, which allows calls to an attendant to be extended across a
network;
•
timed reminder recall, which allows unanswered calls to be recalled to
the attendant. When the attendant extends a call to a destination at
another node, the trunks are not released. This prevents call
disconnection and gives the attendant control of the call, including the
ability to exclude the source or destination;
•
incoming call indication, which is received when a call reaches the
attendant via NAS routing;
•
Camp-on and Call Waiting;
•
Break-in;
•
attendant control, which gives the attendant control of the call, including
control of disconnecting the call and the ability to exclude the source or
destination;
•
ring held party, which allows the attendant console to receive ringing if
a terminal that originated a call to the attendant disconnects while
attendant control is configured;
•
attendant display of Calling Line Identification (CLID), which allows the
CLID of the calling party to be displayed on the attendant console.
These features are supported transparently for ISDN BRI, with the following
exceptions:
•
Camp-on;
•
Break-in;
•
network wide attendant control; when an ISDN BRI terminal disconnects
from an attendant extended call, the call is released on the ISDN BRI
side;
•
ring held party; when an ISDN BRI terminal disconnects from an
attendant extended call, the call is released on the ISDN BRI side.
The displays on ISDN BRI terminals are never updated.
International ISDN PRI Feature description and administration
ISDN BRI features
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