Communication device and communication system

Abstract

The invention discloses a communication device, the communication device is connected with a local side through a symmetric line, and the communication device comprises: a lightning protection module which comprises a transformer, a first capacitor and a second capacitor, wherein two ends of a primary winding of the transformer are respectively connected with the symmetric line and are used for inhibiting common-mode lightning stroke energy introduced by the symmetric line, and the first capacitor, the second capacitor and the transformer form a signal conditioning circuit which is used for filtering low-frequency noise in noise signals acquired by the symmetric line; a filtering module which is connected with the lightning protection module and is used for filtering high-frequency noise in the noise signals acquired by the symmetric line; and a main control module which is used for carrying out operation processing on the noise signals after the low-frequency noise and the high-frequency noise are filtered out. The embodiment of the invention also discloses a communication system. By adopting the embodiment of the invention, the noise signal coupled to the DSL link can be accurately acquired, the lightning protection function is realized, and the environmental noise can be effectively acquired in a lightning stroke environment.

Description

technical field [0001] The present invention relates to the technical field of communication, in particular to a communication device and a communication system. Background technique [0002] DSL (Digital Subscriber Line, Digital Subscriber Line) is a combination of transmission technologies that use telephone lines as the transmission medium. DSL technology supports symmetric and asymmetric transmission modes on the subscriber loop of the public telephone network, which solves the problem that often occurs in network service supply. The "last mile" transmission bottleneck between suppliers and end users. For many years, communication service providers have been measuring the noise power in the line to determine the acceptability of the noise. However, due to the distance between the power line and the DSL communication transmission line, the current DSL equipment cannot truly reflect the noise coupled to the DSL communication line. In addition, the RF noise generated by ra...

AI Technical Summary

Problems solved by technology

However, due to the distance between the power line and the DSL communication transmission line, the current DSL equipment cannot truly reflect the noise coupled to the DSL communication line. In addition, the RF noise generated by radio equipment such as AM and FM in the space cannot be collected, and Lightning protection design is not considered, which can easily lead to lightning damage

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