| 摘要 |
PURPOSE: A multi-office line type caller ID display device is provided to configure plural slave microcomputers and a single master microcomputer to separate signals controlled by office line while decoding the separated signals, so that the master microcomputer can perform display control and office line control functions, thereby increasing operational reliability. CONSTITUTION: Slave microcomputers(SM1,SM2,...) are configured by corresponding to the number of telephone lines(L1,L2,...), and decode CID(Caller ID) signals by office line. A master microcomputer(MM) displays the decoded data of the slave microcomputers(SM1,SM2,...) by retrieving storage number data from a CID storage RAM, and carries out a telephone function. A CID is displayed by executing a separate decoding process by office line.
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