7996 SHDSL NTU User’s GuideChapter 1 Introduction1.1 OverviewThis user’s manual provides general information about the features, functions and operation ofthe 7996-A2-374 SHDSL NTU.The 7996-A2-374 is a Network Termination Unit (NTU) that utilizes SHDSL technology,combining the best of 2B1Q SDSL and HDSL2 to achieve fast and efficient data transmission inboth directions, over a single copper telephone line.The 7996-A2-374 has an industry standard E1 interface. Based on TC-PAM coding, the7996-A2-374 supports data rates of up to 2,048 kbps. It is suitable for leased line applicationssuch as video conferencing, Internet access, and Digital Data Network (DDN) access.Featuring remote control capability, the local 7996-A2-374 is able to perform configuration,performance monitoring, querying, diagnostics, and all maintenance functions over the remoteNTU via the DSL line.1.2 Featuresz TDM-based SHDSL NTUs guarantee real bandwidth without the large overhead requiredby ATM-based NTUsz Full remote control capability via SHDSL Embedded Operation Channelz Complies with ITU-T G.991.2 (G.shdsl)z E1 DTE interfacez Versatile loopbacks for diagnosticsz Built-in test pattern generator and detectorz SHDSL and E1 line performance monitoring (PM)z 96-quarter-hour / 7-day PM storagez Local control via RS-232 management port (VT100) and LAN port (Telnet access)z SNMP management through Ethernet LAN portz Software download capability7996-A2-GB21-00 September 2004 5