330 Calling Party Privacy Override
If CPPO is requested on the forwarding DN and the call is forwarded across
an ISDN link, the outgoing SETUP message includes the Redirecting
Number IE (if it exists) with the Presentation Indicator set to "Presentation
Allowed".
If CPPO is requested on the forwarding DN and the call is forwarded
across a non-ISDN link, no Privacy Override Indicator is outpulsed to
the terminating node if the originating set did not request CPPO. This is
because no Redirecting Number information is sent across a non-ISDN link.
When an internal call is forwarded into the public or private networks, if the
originator requests CPPO and the outgoing trunk route provisions CPPO,
the Privacy Override Indicator is sent to the far end to allow the display of
the Calling Party Number and Name.
Call Pickup
With CPPO activated, when an incoming trunk call with the Privacy
Override Indicator is picked up locally, the Calling Party Number and Name
information is displayed on the terminating set.
Call Transfer
As per existing operation, if an incoming non-ISDN call is transferred or an
incoming ISDN call is transferred to a non-ISDN trunk, the Connect Party
Number and Name information is not passed to the terminating node. The
CPPO feature does not change this operation.
When an incoming call with the Privacy Override Indicator is transferred
across the MCDN network or to a local set, the originator’s calling party
information is displayed on the final terminating set.

Calling Line Identification Restriction

Basic Rate Interface (BRI) sets do not support the Flexible Feature Code
(FFC) feature. CPPO can only be requested by applying the existing Calling
Line Identification Restriction (CLIR) Service option. This is done by setting
the soft key "ID PRES" (if it exists) to "Allowed" or the Presentation of CLID
to far end on outgoing calls (PRES) prompt to YES in Overlay 27. Then an
outgoing ISDN/non-ISDN trunk call carries the Privacy Override Indicator
if the outgoing trunk route provisions CPPO. However, if the Calling Party
Number Information Element (IE) with the Presentation Indicator set to
"Presentation Denied" is included in the SETUP message generated by
the Basic Rate Interface (BRI) terminal, then the BRI terminal does not
allow CPPO. This is because the Presentation Indicator, generated by the
BRI terminal, always overwrites the Calling Line Identification Restriction
(CLIR) service option.
Nortel Communication Server 1000
Features and Services Fundamentals — Book 2 of 6 (C)
NN43001-106 02.04 Standard
Release 5.5 9 May 2008
Copyright © 1994–2008, Nortel Networks
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