Active Speaker Notification; Terminating A Conference - AudioCodes Mediant 600 User Manual

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33.2.5 Active Speaker Notification

After an advanced conference is established, the Application Server can subscribe to the

device to receive notifications of the current set of active speakers in a conference at any

given moment. This feature is referred to as Active Speaker Notification (ASN) and is

designed according to the MSCML standard. Notifications provide information on the

number of active participants and their details.

The notifications are sent unsolicited at specific intervals requested by the application and

only when a change in the number of active conference speakers occurs. If a change in the

speakers list occurs, the server issues an INVITE to the specific SIP UA, and then transfers

the call to the UA.

Event notifications are sent in SIP INFO messages, as shown in the example below of XML

Response Generated for ASN:

<?xml version="1.0" encoding="utf-8"?>

</activetalkers>

</conference>

</notification>

</MediaServerControl>

To remove a leg from a conference, the Application Server issues a SIP BYE request on

the selected dialog representing the conference leg. The Application Server can terminate

all legs in a conference by issuing a SIP BYE request on the Control Leg. If one or more

participants are still in the conference when the device receives a SIP BYE request on the

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