Interactive audio telecommunications message storage, forwarding and retrieval system

摘要

A voice store and forward telecommunications system that provides for the receipt, storage and retrieval of voice messages is described. The system design allows for messages to be received and stored to a mass storage device, messages and prompts to be retrieved from the mass storage device and issued, and DTMF commands to be received simultaneously with the issuance of messages and prompts without conflict. Multiple user telecommunication channels are supported by the system, all in real time. Channel interface processors communicate with a system control processor through paired message segment buffers alternately swapped into the address space of the system control processor. A directory and allocation table corresponding to the mass storage device is maintained by the system control processor in a RAM buffer to permit real time storage and retrieval of messages. A dynamic isolation and cancellation circuit is used to prevent the receipt of any message, prompt or command simultaneously issued by the system independent of any message or command being received from a user.