More point - a data transmission system with the function for re-initialization of the inserted in the process of the modem modem and reinitializing

摘要

PURPOSE:To restore a slave station MODEM immediately to the normal state by informing a fault of the slave station MODEM caused by a fault of an outgoing line to a master station so as to allow the master station to send a training signal. CONSTITUTION:When a fault is detected, a control section 100 applies retraining request notice by means of a slave station address ADD and a fault occurrence data DATA to a master station MODEM 10 via an incoming sub modulation section 24 with a laps of a specified time from the detection of the fault. When a control section 320 of the master station MODEM 10 receives a retraining request notice from the slave station side, the MODEM 10 references a slave station information storage section 34 based on the slave station address, reads out a past fault occurrence history and a retraining execution time relating to the slave station having a fault, terminates the modulation of a host data forcibly to an outgoing main modulation section 14 and applies the training operation sending a training signal to an outgoing line 100.