Data link inspection method of satellite communication system and channel modem for satellite communication system

摘要

The present invention relates to a data link inspection method of a satellite communication system that can easily check whether there is an abnormality of a data link formed through a satellite in a satellite communication system, and a channel modem for a satellite communication system.;In the present invention, the central control station and the plurality of base stations are configured to perform mutual communication via satellite, and are equipped with at least a keyboard and a monitor and are coupled to the central control station so that a system administrator can control the central control station. A satellite communication system having a network management system, comprising: a test command input step of inputting a data link test command to a predetermined base station through the keyboard; and a data link between the central control station and the base station under control of the central control station; A data link forming step of forming, a data sending step of sending, by the central control station, any data input through the keyboard to the base station of the data link inspection target, and receiving data of sending the received data back to the central control station by the base station. Retransmission step and data transmitted from base station and received from base station Including transmitting and receiving data display step of displaying data on a monitor, characterized in that configured.;In this case, the channel modem according to the present invention has a switching function of demodulating the data transmitted from the central control station to generate original data, and modulating the demodulated data again and outputting the demodulated data to the central control station. It is possible to easily check whether there is a data link failure including the operation state of the channel modem of the base station.