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    IP DSLAM

     Introduction

     

    DSLAM, Digital Subscriber Line Access Multiplexer, is network equipment, in general setup in Telecom Company to receive DSL signals through multiple telephone lines coming from multiple DSL subscribers, to transmit data over high speed back bone network by using multiplex technology.
     
    DSLAM is the basic equipment of DSL system, it provides DSL gateway service through commercial or home-used telephone network to achieve the high speed DSL multimedia services. It splits the high speed data and voice signal from high speed data streaming to satisfy the control and DSL gateway services.

     

     Standard

     

    ADSL standards published by ITU-T:
    – G.994 Handshake procedures for DSL
    – G.992.1 (G.dmt) Annex A, B and C
    – G.992.2 (G.lite) Annex A and C
    – ANSI T1.413
    – G.992.3 ADSL2 Annex A, B, C, J, L and M
    – G.992.5 ADSL2+ Annex A, B, C, J and M
    – G.993.1 VDSL
    – G.993.2 VDSL2
    – G.993.5 G.vector
    – G.998.1 ATM bonding
    – G.998.2 PTM bonding
    – G.998.4 G.INP
    – G.9700/01 G.Fast 

     

     Application
     
    In the point to point connection of xDSL, DSLAM is mainly collected multiple signals from xDSL modem connected to backbone network through one IP (Ethernet) port, indicates the network management, protocol translation, flow control functions.

     

    It transforms the analog signal delivered from ATM/PTM circuit into digital format by modulation/de-modulation technology. The voice and data packet were split delivered to the equipments to process. To provide the triple play service, besides voice and data, it also equipped with video processing capability, management and IGMP (Internet Group Management) control so can differ customer’s requirement, providing customization DSL services.
     

     

     Architecture