Nortel 1000 Features And Services Fundamentals page 312

312 Called Party Disconnect Control
An incoming call with Called Party Disconnect Control can be forwarded to
another telephone, but not to another trunk.
Tandem trunk connections are not allowed on incoming calls on trunks with
Called Party Disconnect Control allowed.
If Barge-In or Busy Verify is applied to trunks with Called Party Disconnect
allowed, the trunk is disconnected.
Force disconnect, through service change and maintenance, overrides
Called Party Disconnect Control.
Feature interactions
Automatic Answerback
Incoming calls on a trunk with Called Party Disconnect Control allowed
that terminate on a telephone with Handsfree Answerback are answered
automatically. They are not disconnected automatically, however, when the
calling party goes on-hook.
Conference
Trunks with Called Party Disconnect Control allowed are treated as trunks
without disconnect supervision when conferenced.
Digital Trunk Interface (DTI) - Commonwealth of Independent States
(CIS)
Called Party Disconnect Control may not be used in the CIS market because
of its signaling requirements.
Malicious Call Traced - Enhanced
Prior to this feature, the Called Party Control (CDPC) option was not
supported for conference calls. The CDPC option is now supported if the
conference contains exactly one recording trunk, one MCT activating party
and one other trunk. This is done to make the recorder transparent to the
user. The CDPC option remains unsupported for all other conference calls.
Meridian 911
The Called Party Disconnect (CPDC) feature is used to retain a 911 trunk
when a 911 call is disconnected by the caller. No modification to the feature
is required for Meridian 911, except lifting the CPDC and Automatic Call
Distribution (ACD) NCFW limitation. 911 Calls, arriving through trunks with
CPDC defined, is allowed to NCFW, unlike non-911 ACD calls.
Meridian 911 - Call Abandon
There is no interaction with M911 Call Abandon and Called Party Disconnect
Control.
Copyright © 1994–2008, Nortel Networks
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Nortel Communication Server 1000
Features and Services Fundamentals — Book 2 of 6 (C)
NN43001-106 02.04 Standard
Release 5.5 9 May 2008