Job Administration voice broadcasts involve no documents (no $job_document is used), but can be set up to perform either the same operation, or customized operations, for each recipient.  Apart from playing messages, a voice broadcast can also initiate an IVR session by prompting the person called and awaiting DTMF responses.

Show detailsThe same message/IVR for all recipients
Show detailsMessages/IVR customized for each recipient