1-13150-A2-GB21-80 February 1998IntroductionOverview 1-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Features 1-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Alarm Message Capability 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Front Panel Emulation 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Integral Modem 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Async Terminal Interface Support 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Telnet Access 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .SNMP Management Support 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Physical Description 1-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Standalone CSU Front Panel 1-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Standalone CSU Rear Panel 1-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .OverviewThe CSU acts as an interface between the T1 digitalnetwork and the customer premises equipment, convertingsignals received from the DTE (Data TerminalEquipment) to bipolar signals that can be transmitted overT1 lines.The Model 3150 is a standalone CSU, and theModel 3151 is a carrier-mounted CSU that is designed tofit into the COMSPHERE 3000 Series Carrier.For more information about the carrier-mounted CSU,refer to the ACCULINK 3151 CSU and 3161 DSU/CSUGeneral Information Guide and the COMSPHERE 3000Series Carrier Installation Manual.FeaturesThe CSU optimizes network performance with a widerange 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.• Alarm message display/print capability.• Front panel emulation via Windows-based FrontPanel Emulation software.• Integral modem for standalone CSUs.• Asynchronous (async) terminal interface support.• Telnet access for remote async terminal operations.• Network management provided throughindustry-standard Simple Network ManagementProtocol (SNMP).1