METHOD FOR RECORDING CALL CHARGE RATE IN A SWITCHING SYSTEM

PURPOSE: A charging service recording method in an exchanger is provided to heighten a service quality and improve the stability of an exchanger by detecting an error in advance when a charging record service used in the existing magnetic tape device to a disk. CONSTITUTION: The first disk controller determines whether an error occurs in the first portable disk(302). The first disk controller determines whether the first portable disk unit having an error is in the course of recording a charging service(304). If the first portable disk unit is in the course of recording of the charging service, the first disk controller updates the state information data of the first portable disk unit to the first disk state manager(306). The first disk controller excludes the first portable disk unit having the error from a charging service recording apparatus(308). The second portable disk unit, the other part of the duplexing, which has been set in a standby mode successively performs the charging service recording(310). The first disk controller repeatedly transmits a command that the second portable disk unit should be closed to the second portable disk unit and determines whether an arc signal is received from the second portable disk unit(312). If no arc signal is received in a predetermined time lapse, it is determined to be a time out(314). If the first disk controller receives an arc signal, it determines whether it is the case that a signal informing that the charging service recording had been terminated has been received from the second portable disk unit(316). If it is the case that a signal informing that the charging service recording had been terminated has been received from the second portable disk unit, the charging service recording of the second portable disk unit is stopped, it is registered that no mode allocated to prevent the second portable disk unit from using(318). If the first portable disk unit is mounted and a charging service is recordable, the first portable disk unit is set as an active state and the second portable disk unit is set as a standby state, so that the charging service is recorded in the first portable disk unit. 본 발명은 과금 서비스 기록 중인 휴대용 디스크 장치에서 오류가 발새하는 경우 이를 닫아 스탠바이로 만들고, 스탠바이로 대기 중인 휴대용 디스크 장치를 액티브로 설정하여 과금 서비스 기록의 중단없이 기록하는 교환기에서 과금 서비스 기록하도록 하기에 적합한 교환기에서 과금 서비스 기록 방법에 관한 것으로서, 종래의 기술에 있어서의 과금 데이터는 중요한 자료이지만 종래의 자기 데이프는 컴퓨터에서 인식하기 힘들며, 분석을 정상적으로한 경우에도 과금 데이터의 정확도가 떨어지기 때문에 과금 데이터의 신뢰도가 떨어지고 크기에 비해 용량이 작아 휴대가 불편한 결점이 있었으나,