Avaya Communication Manager Administrator's Manual page 1733

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 COR and 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.
Interactions
•
DCS Trunk Turnaround
OTTOTT increases the set of cases in which DCS Trunk Turnaround may be accepted. However,
use of OTTOTT in combination with a DCS network is strongly discouraged. The following
algorithm describes the DCS Trunk Turnaround request process.
a
If any party on the call receives a local-dial, busy, intercept, or reorder tone, deny
turnaround.
b
If any remaining party is an answered station or attendant, accept turnaround.
c
If any remaining party is on an incoming trunk, accept turnaround. For the purposes of this
check, an outgoing DCS trunk that has been turned around an odd number of times via a
DCS trunk turnaround is considered an incoming trunk with disconnect supervision.
Similarly, an incoming DCS trunk that has been turned around an odd number of times is
considered an outgoing trunk.
d
If any remaining party is an outgoing trunk administered for OTTOTT that has received
answer supervision, accept turnaround.
e
If any remaining party is an outgoing DCS trunk, forward the turnaround request.
f
Otherwise, deny turnaround.
•
Incoming Disconnect Supervision
Outside of the U.S., incoming disconnect supervision is a switching capability that restricts
transfers or conferences for certain incoming trunks. In the U.S., all incoming trunks are assumed
to provide disconnect supervision. In some countries this assumption is not valid, so administer
whether or not an incoming trunk provides disconnect supervision for each trunk group.
•
Personal Central Office Lines (PCOLs)
Transfer of PCOLs is not subject to the normal restrictions applied to transfer of other trunks.
These transfers are allowed since the PCOL appearance remains on one or more stations as a
feature button. System users must be aware that the DROP button cannot be used to disconnect
the transferred-to party from the call. Hence, if an outgoing PCOL is transferred to an outgoing
trunk and neither of the trunks can supply a disconnect signal, the two trunks lock up.
Administrator's Guide for Avaya Communication Manager
November 2003
Feature Reference
Transfer — Outgoing Trunk to Outgoing Trunk
1733