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DEFINITY ECS Release 8.2
Administrator’s Guide
555-233-506
Issue 1
April 2000
Features and technical reference
1558Transfer — Outgoing Trunk to Outgoing Trunk
20
DCS networks provide a similar but more restrictive version of this feature, called
DCS Trunk Turnaround, which permits two outgoing trunks to be connected when
the switch at the remote end of one of the trunks agrees to turn around the logical
direction of the trunk. DCS trunk turnaround is permitted, when some other party
involved in the call (at the remote switch) can provide disconnect supervision.
Without OTTOTT or DCS, a conference involving two or more outgoing trunks is
permitted only when at least one remaining conference party is an attendant,
incoming trunk, or station.
Considerations
■ OTTOTT is not intended for use in DCS networks, since DCS Trunk
Turnaround provides comparable capabilities much more safely. However,
use of OTTOTT with DCS is not prohibited, and may be useful when one
or more of the trunks goes off the DCS network.
Security Measures
!
SECURITY ALERT:
This feature can be used to transfer an outside party to a trunk over which
toll calls might be made, and enabling it poses significant security risks.
Since trunks have to be specifically administered for OTTOTT, you should
examine the Class of Restriction (COR) and Facility Restriction Level (FRL)
of that trunk group to determine if they are appropriate.
!
SECURITY ALERT:
OTTOTT is not a system-wide parameter. It is administered on a trunk-group
basis. You must enable the Trunk-to-Trunk Transfer field on the
Feature-Related System Parameters screen for this feature to work. If you
deem that the feature is not relevant to your business practices, do not
enable it. Alternately, if a temporary need presents itself, you can
temporarily enable this feature and then turn it off.