Lucent Technologies 555-230-220 manual Call Classification

ASAI and Call Control

Call Classification

The ECS uses the Call Classification process, along with a variety of internal and external events, to determine a Switch-Classified call’s outcome. If Call Classification after Answer Supervision is disabled, then whenever the called endpoint is external, a call classifier is used.

The classifier is inserted in the connection as soon as all the digits have been outpulsed.

The Global Call Classification can be administered by setting the USA Default Algorithm field to ‘n’ on the system Parameters OCM Call Classification form. Global Call Classification uses the TN744D (or later) and TN 2182B (or later) call classifiers.

If Call Classification after Answer Supervision is enabled, the ECS will not use a call classifier and will instead only rely on network answer supervision to determine whether the call is answered. If Answer Machine Detection is requested for the call, the ECS will attach a call classifier after answer supervision has been received.

A call is classified as either “answered” or “dropped” (Third Party Call Ended).

Ringing is reported to the adjunct as an Alerting Event Report, but in and of itself is not a final classification. “Non-classifiable energy” is always treated as an answer classification and reported to the adjunct as such. The modem’s answer back tone results in a Third Party Call Ended. The SIT detection is reported to the adjunct as an Answered Event Report or Third Party Call Ended depending on the customer’s administration preference. Answering Machine Detection (AMD) is reported as answered or call ended, depending on administration or call options. Starting with G3V4, the accuracy of SIT tone detection has been improved by interpreting the cause value for SIT tones that the network sends in the ISDN PROGress messages. If no SIT tone related cause value is included in a PROGress message, then the classifier is used to detect the SIT tone. See the “change SIT Treatment” form in the DEFINITY Enterprise Communications Server Implementation, 555-230-302, to administer SIT reporting to the adjunct.

4-12Issue 7 May 1998