Call message delivery system and method
 A call delivery service (CDS) apparatus and method are disclosed which enable non-subscriber callers to a common carrier network to bill a voice message delivery to their billing code, and to check the delivery status of the message from the network during a subsequent call. Optionally, at the caller's request, CDS can deliver the message status to the caller at a predesignated station. In one embodiment the caller can optionally request a response from the message recipient or answering party at the called station. 
AT&T Bell Laboratories
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Tung-Hai Richard E. Percy B. Wen-Ping Thomas L. Georg K. Nga V. Dawn R.
Hsiao LeCronier Brown Ying Russell, Jr. Karawas Chau Parrott