作者: David Phillip Silverman
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摘要: An automatic call-back device notifies a subscriber when called party's telephone station is no longer busy. When the calls party and busy, offers options for calling If selected, monitors an on-hook signal, example. goes on-hook, connects in call. multiple subscribers call same party, stores identifier corresponding to each list based on party. contacts first (i.e., that first). this cannot be reached, then next so until one of connected with or exhausted.