1-13360-A2-GB20-10 June 1996IntroductionOverview 1-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Features 1-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .G.703 DTE Interface 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Alarm Message Capability 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Front Panel Emulation 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .SNMP Management Support 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Physical Description 1-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Front Panel 1-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Rear Panel 1-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .OverviewThe E1 NTU acts as an interface between a Highbit-rate Digital Subscriber Line (HDSL) network and thecustomer’s Data Terminal Equipment (DTE), convertingsignals received from the DTE into the two binary, onequaternary (2B1Q) signal format for transmission over theHDSL network.The E1 NTU’s G.703 DTE interface supports2.048 Mbps (E1) data that is compatible with the signalformat of ITU Recommendation G.703 and the framestructure of ITU Recommendation G.704.In addition to the G.703 DTE interface, the 336x E1NTUs have one to four EIA 530A synchronous data portsthat may be configured for rates of 64 kbps to 1984 kbps.The 336x Series consists of a Model 3360 NTU(2-port), a Model 3364 NTU (4-port), and a Model 3365NTU (1-port). Differences between these models arediscussed where applicable throughout this guide.FeaturesThe E1 NTU optimizes network performance with awide range of features such as the following:• Software configuration menu displayed via a liquidcrystal display (LCD) to permit quick and easyoperation, and elimination of complicated hardwarestrapping.• Local or remote configuration and operationflexibility.• Several loopback capabilities and test patterngenerators.• G.703 DTE capability.• Alarm message display/print capability.• Front panel emulation via Windows-based FrontPanel Emulation software.• Network management provided throughindustry-standard Simple Network ManagementProtocol (SNMP).1