Asymmetrical digital loop routing equipment and interface card

An interface card, asymmetric technology, applied in the direction of digital transmission system, data exchange network, electrical components, etc., can solve the problems of short wiring distance, difficult design, high manufacturing cost of ADSL interface card, so as to avoid poor selectivity and reduce The effect of manufacturing costs

Inactive Publication Date: 2008-12-31
NEW H3C TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The invention aims to solve the problems of high manufacturing cost, high design difficulty and short routing distance of the ADSL interface card in the routing equipment of the prior art

Method used

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  • Asymmetrical digital loop routing equipment and interface card
  • Asymmetrical digital loop routing equipment and interface card
  • Asymmetrical digital loop routing equipment and interface card

Examples

Experimental program
Comparison scheme
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Embodiment 2

[0092] The ADSL CPE unit, the interface card processing unit 340 and the interface card Ethernet interface 351 in the second embodiment can be implemented by the ADSL SOC chip, and A-A is used as the dividing line between the interface card and the main control board.

[0093] Figure 6 Shown is the processing flow of ADSL data and management data in the interface card and the main control board in the second embodiment. The Ethernet between the main control board of the routing device and the interface card needs to transmit two types of data: ADSL data and management data.

[0094] The sending and receiving process of ADSL data is as follows: In the uplink direction, the data from other ports (usually other Ethernet ports) completes the relevant protocol processing through the data plane on the main control board side of the routing device to form a data packet that meets the requirements of the ATM AAL layer. And the data packet is composed of an Ethernet frame and sent to...

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PUM

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Abstract

The invention discloses an ADSL routing device, which includes an ADSL interface card and a main control card. The ADSL interface card includes an ADSL modulation and demodulation unit and an interface card processing unit, wherein the ADSL modulation and demodulation unit is connected with the interface card processing unit to carry out ADSL The conversion between the digital signal of the data and the AAL data packet of the asynchronous transfer mode adaptation layer; the interface card processing unit transmits the ADSL data in the AAL data packet to the main control card, and encapsulates the ADSL data received from the main control card in the AAL The data packet is transmitted to the ADSL modem unit. The invention also discloses an ADSL interface card. The invention reduces the manufacturing cost of the ADSL interface card, avoids the poor selectivity caused by the reduction of ATM chip suppliers, reduces the design difficulty of the ADSL interface card, and increases the wiring distance.

Description

technical field [0001] The present invention relates to routing equipment and ADSL (Asymmetric Digital Loop, Asymmetric Digital Subscriber Line), in particular to an ADSL routing equipment interface card. Background technique [0002] ADSL is a technology for transmitting high-speed digital signals over ordinary telephone lines. By adopting new modulation technology and using new transmission characteristics on ordinary telephone lines, the function of telephone lines is expanded without affecting the original voice signal. ADSL uses ordinary telephone lines as the transmission medium. The traditional MODEM (modem) only uses the low-frequency band of 0K-4KHz (kilohertz) on the telephone line for transmission, and the telephone line has a bandwidth close to 2MHz (megahertz) in theory. ADSL is precisely because of Only the high frequency band after 26KHz can provide such a high speed. The specific working process is: in the uplink direction, after the data is encoded by ADSL...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/56H04L29/10H04L45/60
Inventor 魏初舜余昌刚段嘉华杨建
Owner NEW H3C TECH CO LTD
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