How to process alarm signal of optical cable TV integrated information network

摘要

In accordance with the present invention, in an integrated information communication network of an optical cable TV, an E1 signal (CEPT: European standard signal using a transmission rate of 2.048 Mbps) multiplexed in twelve in a telephone exchange in a domestic telephone is transmitted through a line terminating device (LT) The frame alignment unit monitors an alarm condition such as loss of a received signal or loss of a frame synchronizing signal and outputs the detected alarm condition to the dime slot 16 of the upward E1 signal And the 12 E1 signals are transmitted to the maintenance center via the central station to easily check the reception status of the E1 signal, thereby eliminating the inconvenience of the subscriber and reducing the time required for the inspection. Thereby improving the efficiency of the system.