3Com 3C13755-US - Router 5642 Installation Manual

Also see for 3C13701: Installation guide Quick reference guide Installation guide Getting started guide Module guide

Contents

3Com 3C13755-US - Router 5642 Installation Manual Manual pdf 55 page image

ADSL MIMM 53Figure 59 1-Port Channelized T3 PanelTable 48 1-Port Channelized T3 LEDsADSL MIMM The 1/2 ADSL (1-Port/2-Port Asymmetric Digital Subscriber’s Loop) modules areavailable for 3Com 5000 Routers. The ADSL interface modules provide the userswith telephone interfaces equivalent to WAN interfaces, which can enable a LANsubscriber to reach the DSLAM (Digital Subscriber's Loop Access Multiplexer) ofthe service provider through an analog subscriber line, and then access the ATM/IPbackbone network or Internet. Thus, high-speed data communications and videoon demand can be fulfilled. As ADSL uses the high frequency band upper than 26KHz for data transmission, its activities will not interfere the voice service (whichoccupies the low frequency band in the range of 0 to 4 KHz) implemented acrossthe same line. Normally, the subscriber can be provided with a speed in the rangeof 32 Kbps to 8 Mbps (downstream rate) and a speed in the range of 32 Kbps to 1Mbps in the (upstream rate).The primary function of ADSL module in a system is to provide ADSL interface forthe router, which includes,■ Allows manual activation/deactivation of ADSL line, and supports four SARloopback methods that facilitate the fault isolation.■ Supports interface standards of G. DMT, G. Lite, and T1.413 and theconfiguration of auto-sensing.■ Supports network lattice coding (except for the G. Lite standard) on ADSLinterfaces for enhancing the stability of ADSL connections.LED MeaningLINK OFF means that the link is not set upand ON means that the link has beenset up.ACT OFF means that no data is beingtransmitted or received, and blinkingmeans that data is being transmittedand received.