AT&T 555-230-520 manual Busy Command

Call Vectoring Commands

Busy Command

busy

Purpose

Gives the caller a busy signal and causes termination of vector processing.

Syntax

busy

Requirements

Basic Call Vectoring software must be installed.

Operation

The command takes effect on non-CO trunk calls whether or not answer supervision has been sent. However, if the call is on a CO trunk and answer supervision has not been sent, the busy is not passed back by the CO, and the caller continues to hear ringback from the CO. Calls are dropped approximately 45 seconds after the busy tone is applied.

If ISDN-PRI is involved, the application of the busy tone is enabled via D-channel messaging. The network switching office returns the busy tone to the caller. The facility to the PBX/ACD is dropped, thus making it immediately available for another call.

Answer Supervision Considerations

After the 45 second timeout, an unanswered CO trunk call is answered and then dropped. All other unanswered calls after this timeout are dropped without being answered. For an ISDN call that has not yet queued or been answered, no timeout occurs, and answer supervision is not sent. Instead, a message requesting a busy tone is sent to the network and, subsequently, the trunk is released.

Feature Interactions

For Look-Ahead Interflow, the command is considered a call denial vector command in all cases.

A-24Issue 4 September 1995