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Call Vectoring Commands
A-24 Issue 4 September 1995
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.