| 摘要 |
Apparatus and process for logging telephone calls on a single telephone line. The apparatus records on a cheap recording medium such as an audio cassette tape or a simple solid state memory a signal indicative of each telephone number dialled and signals indicative of the time of day and the duration of each telephone call dialled from the single telephone line. The information may be processed in a remote processing apparatus to produce the desired information, ie a printed record of said information. The logging apparatus may be combined with means for identifying the calling subscriber and recording his identity and the combination may be used for call burring.
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