Preventing Reciprocal Call Forward - Nortel 1000 Features And Services Fundamentals

180 Call Forward, Remote (Attendant and Network Wide)
As the data blocks associated with Phantom TNs match those of standard
analog (500/2500 type) telephones configured within the system, the
operation of the RCFA and RCFD features on Phantom TNs is applicable
to the RCFW feature. As such, the set-based local and network RCFW
features can be used to configure and activate/deactivate the CFW DN
of Phantom TNs.
The Phantom TN feature uses a Default Call Forward (DCFW) DN. If call
forward is not active on the Phantom TN, all calls to the Phantom TN DN
are routed to the DCFW DN.
The Phantom TN feature modifies the set-based RCFW feature so that if
CFW is not active on the Phantom TN, and the CFW DN entered in the
RCFV operation matches the DCFW DN, confirmation tone is returned to
the RCFV user; if the CFW DN entered does not match the CDFW DN,
overflow is returned.
This change to the set-based RCFV operation is applicable to the network
RCFV operation. The operation of this feature network wide requires no
changes to the ISDN message passing for the set-based network RCFV
operation.
There is no Attendant RCFW operation which interacts with the DCFW
DN of Phantom TNs.

Preventing Reciprocal Call Forward

When Preventing Reciprocal Call Forward Allowed (PVCA) is defined in LD
15, a set within the same customer configuration cannot be call forwarded
to a set that is call forwarded back to it. Thus, CFW loops are prevented.
This feature applies when the CFW DN is changed by Remote Call Forward.
For network operation of the set- and attendant-based RCFW features,
entering an invalid CFW DN (under the rules of the PRCF feature) results in
overflow tone being returned and the CFW DN being ignored.
Traffic Measurements
The peg count, for the attendant RFW key, is generated on the first RFW
key press of the RCFW operation. While the RFW key may be pressed
multiple times during a single RCFW function, the peg count will only be
implemented once.
The RFW key peg count is included in the TFC005 feature key usage traffic
report.
Copyright © 1994–2008, Nortel Networks
.
Nortel Communication Server 1000
Features and Services Fundamentals — Book 2 of 6 (C)
NN43001-106 02.04 Standard
Release 5.5 9 May 2008