ASAI and Call Control

Third Party Single-Step Conference

Starting with Release 6, this capability allows the adjunct to add a device into an existing call. This is accomplished with a single request without the need for a local device to be previously connected into the call. Up to the maximum allowed number of parties (as per administration), can be added to a call by using Single-Step Conference. The party to be Single-Step Conferenced may be added as a listen-talk (full-visibility) participant, or as a listen only (no visibility), participant.

The mixing of visibility options is not recommended for subsequent Single-Step Conference requests into the same call. Regardless of visibility, displays are not updated as a result of a Single-Step Conference operation. However, when one party drops, the displays will be updated to reflect the actual remaining count. This may result in the display update showing a count that includes a party that was added with no visibility. However, the behavior of the station displays is expected to change in a future release.

No system tones will be provided as a result of the Single-Step Conference operation.

This feature may be used instead of, or in addition to Service Observing. There are no tones provided on the call during or after a party is added via Single-Step Conference. If tones are needed, applications may use the “Send DTMF” ASAI capability after adding a device into a call.

This capability generates Connected Event Reports instead of Conferenced Event Reports. Two new cause values within the Connected Event Report indicate that a new party was added to the call by using Single-Step Conference either with full visibility (CS3/9), or no visibility (CS3/8).

Information Flow

The adjunct expects a response to its requests. An acknowledgement is sent to the controlling adjunct if the request is successful. As part of the acknowledgement, a party_id list and an extension list of all the parties on the call, are provided.

If the request is unsuccessful, the DEFINITY ECS denies the request and sends the adjunct an appropriate cause value.

4-56Issue 7 May 1998

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Lucent Technologies 555-230-220 manual Third Party Single-Step Conference