AT&T DEFINITY Generic 3 Manuale Utente

Call Vectoring Commands

Issue  4  September 1995 

busy

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

Basic Call Vectoring software must be installed.

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 drop ped 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.

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.

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