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ASAI and Feature Interactions
12-16 Issue 7 May 1998
If a call covers and rings at a station with domain-control, then the Alerting Event
will indicate Call Coverage in a Cause IE. The possible causes are: Send All Calls
Cover All or Go to Cover (CS3/31), Principal Station is Busy (CS3/26), and
Principal Station Not Answering (CS3/28).
When a call is redirected via Redirect Call, the coverage timer is restarted. Thus, if
the destination does not answer, the call will go to the coverage point for the
principal (that is, the original called party). The subsequent Redirection No
Answer timer is also restarted when a call is redirected from a coverage point via
Redirect Call.
Remote Call Coverage
Starting with R5: Calls that cover to a remote (off-net) coverage point may cause
charging information to be received if the outgoing trunk is administered for
charge advice. Charging information will be sent as part of a Charging Event
Report invoked by the Trunk Group Notification Association.
Coverage of Calls Redirected Off-Net
Starting with R5: this new feature allows a call classifier port to be added to
determine if an external party answers the call. If a call covers to a remote point
over a trunk administered for charge advice and modem tone is encountered, the
call classifier uplink message may cause ECS to drop the trunk and continue to
check for available coverage points. As a result, the adjunct will receive at least
one Charging Event Report if answer supervision was provided before the call
classifier detected the modem.
If a call covers to an external number over an Advice of Charge (AOC) trunk, the
charging number indicated in any Charging Event Reports will be the principal
station’s extension number.
Call Coverage Path Containing VDNs
When a call is redirected to a station/split coverage path and the coverage path is
a VDN, the ECS provides the following event reports for the call:
■ Call Redirected Event Report [for the Third Party Domain (Station) Control
association monitoring/controlling the station]:
A call redirected event can also be sent if the call provides events to an
Event Notification association and the VDN in the coverage path has Event
Notification active. The VDN with active notification receives a Call Offered
to Domain Event Report. If the VDN in the coverage path is not monitored
(Event Notification active), then no call redirected event is sent to the active
Event Notification association providing event reports for the call.
■ Call Offered to Domain Event Report: