| 摘要 |
A digital memory used by a digital telephone answering device to record messages, a method by which vacant memory space created by the deletion of a message interlying two saved messages is recovered for future message recording use. Available vacated memory is transferred to the top of memory while saved messages are moved to form a contiguous block in lower memory. The location of messages in the digital memory, and save/delete flag, are stored in an entry table for reference and memory management.
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