| 摘要 |
AN EEPROM (18) OF A TELEPHONE (1) STORES SETTING DATA (18B) AND PIECES OF EDITION NUMBER INFORMATION (18A) EACH REPRESENTING THE EDITION INFORMATION FOR CORRESPONDING PIECE OF THE SETTING DATA, AND A MEMORY UNIT (24) OF A CENTER APPARATUS (2) STORES SETTING DATA (24B) AND EDITION NUMBER INFORMATION (24A), WHICH ARE SET FOR EACH TELEPHONE. THE EDITION NUMBER INFORMATION (18A) OF EACH TELEPHONE IS COMPARED AND COLLATED WITH EACH CORRESPONDING EDITION NUMBER INFORMATION (24A) IN THE CENTER APPARATUS, THEREBY MANAGING THE UPDATED STATE OF THE SETTING DATA OF THE TELEPHONE. AS A RESULT, IT CAN BE APPROPRIATELY DETECTED THAT THE DATA IN EACH TELEPHONE IS CHANGED AS INDICATED, OR THAT THE DATA IS ILLEGALLY SET. WHEN THE PIECES OF EDITION NUMBER INFORMATION DO NOT COINCIDE WITH EACH OTHER, THE SETTING DATA IN THE SETTING APPARATUS IS DOWNLOADED TO THE TELEPHONE FOR CORRECTION.FIG. 6
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