Circuit and equipment of digital subscriber line

Abstract

The embodiment of the invention discloses a circuit of a digital subscriber line. The circuit comprises a line driver, an echo cancellation (EC) module, a transformer module, a first high-pass filter, an impedor and a bypass high-pass filter, wherein the transformer module is a high-pass filter; a receiving channel high-pass filter of the transformer module can receive an uplink signal of AnnexA and a part of signal of an integrated services digital network (ISDN); a transmitting channel high-pass filter of the transformer module can transmit a downlink signal of the AnnexA; the first high-pass filter can transmit the downlink signal of the AnnexA; the bypass high-pass filter filters an ISDN signal in cooperation with the ISDN; and the bypass high-pass filter receives the uplink signal of the AnnexA in cooperation with a plain old telephone service (POTS). The embodiment of the invention also discloses equipment of the digital subscriber line. Due to the adoption of the embodiment, an AnnexA mode and an AnnexB mode can be supported at the same time, and the original POTS service and ISDN service on a copper wire are compatible.

Description

technical field [0001] The invention relates to the technical field of digital subscriber lines, in particular to a digital subscriber line circuit and equipment. Background technique [0002] xDSL (x Digital Subscribe Line, x Digital Subscriber Line) is a general term for various types of DSL (Digital Subscribe Line, Digital Subscriber Line), and is a point-to-point transmission technology using copper telephone lines as the transmission medium. DSL technology supports symmetric and asymmetric transmission modes on the POTS (Plain Old Telephone Service, traditional telephone service) user loop, and solves the "last mile" transmission bottleneck problem that often occurs between network service providers and end users. Since a large number of telephone subscriber loops have been laid, making full use of existing copper cable resources and realizing high-speed access through copper twisted pairs has become the most realistic broadband access network solution with the lowest c...

AI Technical Summary

Problems solved by technology

As a result, in the existing DSL circuit, there are many types of single boards and a large number of device codes

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