| 摘要 |
PURPOSE:To attain accurate time management at both a center communication equipment and a terminal equipment by devising the system such that the center communication equipment sends a data at a reference time to the terminal equipment and the terminal equipment adjusts its own data to the reference data when a time difference between its own clock and the reference time is at the outside of the allowable range. CONSTITUTION:A reference time data sent from a center communication equipment 10 is received by a terminal equipment 30 and it is compared with a time data of a clock 34 of the terminal equipment 30 and a time difference is calculated. When the time difference is at the outside of the allowable range, fault information is sent from the terminal equipment 30 to the communication equipment 10. Simultaneously, a controller 32 of the terminal equipment 30 adjusts the time of the clock 34 so that it is coincident with a reference time data of the equipment 10. Thus, the time management accurate at all times is implemented between the center communication equipment and the terminal equipment. |
