Method of avoiding unable synchronous port of ADSL

Abstract

The method includes the following steps: a detecting unit is set at central office used for detecting the state of ADSL port, if the ADSL port is at the state of HANDSHAKE, the detecting unit sends the information about ADSL port to the control chip, the control chip sends out the instruction of restarting the ADSL port; after the ADSL port receives the instruction of restarting, the ADSL port is restarted.

Description

Technical field: [0001] The invention relates to a method for avoiding that ADSL ports cannot be synchronized. Background technique: [0002] ADSL (Asymmetrical Digital Subscriber Loop, Asymmetrical Digital Subscriber Loop) is used to transmit voice and data simultaneously on copper twisted pair, and is a physical transport layer protocol based on unshielded twisted pair medium. ADSL is suitable for providing ordinary telephone service (POTS) and a series of digital channels at the same time on a pair of ordinary twisted-pair user loops. Among them, the digital channel has an asymmetric rate: in the direction from the network center to the user, it can provide a downlink high-speed channel up to 6-9Mbps and a duplex low-speed channel, while in the opposite direction it only provides a data uplink rate of 800Kbps and a voice bandwidth of 4KHz . Because ADSL has many characteristics such as asymmetry, long transmission distance, and strong anti-interference ability, it has g...

AI Technical Summary

Problems solved by technology

However, due to some differences in protocol understanding between some brands of MODEMs and broadband network equipment-specific central office chips, in practical applications, after the central office port and some brands of MODEMs work together for a long time, the state of the central office port will always stay. In the HANDSHAKE state, it does not migrate to the TRAINING state, resulting in the problem that the central office and the user cannot be synchronized

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