MOBILE RADIO LINE CONTROL SYSTEM

摘要

PURPOSE:To attain quick and sure restoration at a fault of dial connection control by allowing a connection controller to send a signal for starting the restoration to parallel processing systems simultaneously after on-hook is confirmed. CONSTITUTION:Each parallel processing system informs the end of processing to a connection controller. when at least one of the parallel processing systems includes a negative acknowledge (failure in processing), a main body of the connection controller gives a command of transmission of a message urging on-hook to a base station toward a portable telephone set and the base station sends the message to give a command of on-hook to a caller. The portable telephone set sends an on-hook signal to the base station and the base station informs the on-hook of the caller to the connection controller. The connection controller sends a restoration signal to each parallel processing system to give a command of starting the interruption of the processing and of restoring the state to a state before the processing operation start to each parallel processing system. Thus, quick and sure restoration is implemented at a fault of the dial connection and the convenience of the user, operability and the reliability of the system are improved.