Lucent Technologies 555-230-220 manual Call Classification for User-Classified Calls

ASAI and Call Control

Call Classification for User-Classified Calls

All call-progress audible tones are provided to the originating user at the calling endpoint (except that user does not hear dial tone or touch tones). Call progress feedback is sent to the adjunct in event reports. For OCM preview dialing applications, final call classification is done by the station user staffing the originating set (who hears call progress tones and manually records the result).

ECS Operation for User-Classified Call Setup

Before trying to set up the call, the ECS validates the field/options consistency. It then attempts to originate the call for the originating user on behalf of the extension specified in the originating address (orig_addr) call parameter.

Once the call is successfully originated, the ECS does not drop it regardless of outcome. The only exception is the denial outcome which results in the intercept tone being played for 30 seconds, after which the call is disconnected. The normal audible feedback is provided to the originating station user. It is then up to the originating station user or application to drop such calls (either by going on-hook or via a Call Control request). For example, if the adjunct places a call to a busy destination, the originator will be busy until he or she normally drops or until the adjunct sends a Call Control command to drop the call.

Once set up, either the station user or adjunct may control this call. The adjunct may then use the association used for the Third Party Make Call request to control the call.

Starting with Release 6, a User-Classified Call can originate from a station AWOH (Administration Without Hardware), or a hunt group extension administered with members AWOH. This is referred to as a Phantom Call.

User-Classified Call Originator

For the originator to place the call, the originator’s set (display or voice) must have an available call appearance for origination and must not be in the talking (active) state on any call appearances. The originator is allowed to have a call(s) on hold or alerting at the set.

The originator may go off-hook first, and then issue the Third Party Make Call request. The ECS originates the call on the call appearance with dial tone.

If the originator is off-hook busy, the call cannot be placed and the request is denied (NAK/Return Error component, cause=CS0/17 — User busy). If the originator is unable to originate for other reasons, the ECS denies the request. See ‘‘Negative Acknowledgement of a User-Classified Call’’ on page 4-23 in this chapter for more detail.

4-22Issue 7 May 1998