3Com Router 5000 and Router 6000 v2.41Module GuideChapter 3Multifunctional Interface Modules (Router 5000)3-50Modem interfacePhone portLine portADSL cardRJ11 interfacePSTNModem interfacePhone portLine portADSL cardRJ11 interfaceRouterDSLAMSplitterModem interfacePhone portLine portADSL cardRJ11 interfacePSTNModem interfacePhone portLine portADSL cardRJ11 interfaceRouterDSLAMSplitterFigure 3-54 Connecting the Router 1-Port ADSL Over POTS MIM3.12 Router 2-Port ADSL Over POTS MIM3.12.1 IntroductionRouter 2-Port ADSL Over POTS MIM, the 2-port ADSL over PSTN interface card,allows a LAN subscriber to connect to the digital subscriber's loop access multiplexer(DSLAM) at the central office over a regular analog subscriber line or telephone line.Thus, the subscriber can access the ATM/IP backbone or the Internet to enjoyservices such as high-speed data communication and video on demand (VoD).ADSL transmits data in the high frequency band above 26 kHz. Therefore, it canprovide services without interfering with the voice service being provided in the lowfrequency band (0 to 4 kHz) on the same line. It provides downlink rates in the range32 kbps to 8 Mbps and uplink rates in the range 32 kbps to 1 Mbps.The ADSL interface cards provide these functions:z Manual ADSL line activation and deactivation, supporting SAR loopback forconvenient fault isolation.z Interface standards of G. DMT, G. Lite, and T1.413, auto-sensing.z Trellis coding (except for G. Lite) on ADSL interfaces, enhancing stability of ADSLconnections.3.12.2 Interface AttributesThe following table describes the interface attributes of the Router 2-Port ADSL OverPOTS MIM.Table 3-30 Interface attributes of the Router 2-Port ADSL Over POTS MIMAttribute Router 2-Port ADSL OverPOTS MIMConnector RJ-11
