ASAI and Call Control

The Alerting and Call Connected Event Reports are sent to the adjunct when the call is being delivered at a physical endpoint (agent/extension). The Connected Party number item and its extension are included in these event reports. For announcements, the connected party extension is the same as that specified for the calling endpoint in the Third Party Make Call request. For hunt groups and splits, this is the member/agent extension receiving the call.

The Call Ended Event Report is sent to the adjunct when the call is dropped because of a busy, reorder, denial, answer-back tone, or no-answer result. A separate Dropped Event Report is not sent for these outcomes.

If a SIT was detected, the call is either dropped (call ended message is sent with cause=SIT value), or it is considered answered depending on how the ECS is administered. If an ISDN progress message is received with a cause value that maps to a SIT tone, then a call is dropped or answered depending upon the ECS administration. See Table 4-2on page 4-13 for definitions of the SITs detected and cause value mappings.

For G3V3 and later, an ASAI adjunct may request Answering Machine Detection (AMD) for a Switch-Classified call. If AMD is requested for a call, the receipt of Network Answer Supervision or the ISDN CONNECT message is no longer sufficient to classify the outcome of a call. Further classification by the call classifier is required.

If an answering machine is detected, a cause value is sent in either the Answered or the Call Ended message to indicate such, and the call is either dropped or connected. If the treatment selected is connect, an Event Report is sent to the adjunct. The treatment may be specified either system-wide or on a per-call basis.

NOTE:

When AMD is requested on a Switch-Classified call, the reporting of the call outcome is delayed because detection of voice energy is no longer sufficient to classify a call, and further classification is required to distinguish between a live answer and a machine answer. However, the maximum number of call classifiers required for Switch-Classified calls need not be increased, since the increase in average holding time for call classifiers is minimal (up to two seconds). AMD uses the following Call Classifiers: TN744B (or later), and TN2182.

For Switch-Classified calls, the COR of the ASAI link is used to determine whether a call can be made to the destination indicated in the request.

Switch-Classified Call Originator

When the destination answers, the originator receives ringing. If the originator intraflows with priority, the new destination receives priority ringing. The originator receives the zip tone if it is in auto-answer mode.

Issue 7 May 1998 4-17

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Lucent Technologies 555-230-220 manual Switch-Classified Call Originator