Paradyne COMSPHERE 3550 Series User Manual

Also see for Comsphere 3551: Installation manual Quick reference guide

Contents

1-13550-A2-GB20-40 July 1999About Your DSUOverview 1-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Standard Features 1-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Optional Features 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .V.32 DBM 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-Port TDM/Flex 1-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Upgrades Available 1-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Technical Specifications 1-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Equipment Warranty and Support 1-8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .OverviewThe COMSPHERE Model 3550 or 3551 Data ServiceUnit (DSU) supports communication between computersand other data processing devices by providingconnections to digital data service (DDS) transmissionfacilities. Both point-to-point and multipointconfigurations are supported.The following sections describe the standard featuresof the DSU, as well as the features of the options that mayhave been ordered with your unit. The technicalspecifications of the DSU and its orderable options arenear the end of the chapter.Standard FeaturesThe Model 3550 or 3551 DSU offers the followingfeatures:• Multispeed operation. The DSU operates at datarates of 2.4, 4.8, 9.6, 19.2, 38.4, and 56kbpsfull-duplex over the digital data service (DDS)network.Two DTE connectors (interfaces) are provided forPort 1: EIA-232-D and V.35. Use the EIA-232-Dconnector for data rates up to and including19.2 kbps; use the V.35 connector for higher rates.• Rate Adaption. With this feature, the DSU canadapt its data rate to a low-speed application whileoperating over the high-speed DDS circuit.• LADS operation. The DSU can operate as a localarea data set (LADS) (sometimes called alimited-distance modem, or LDM) at 2.4, 4.8, 9.6,19.2, 38.4, 56, or 64kbps.• Single-Port Async/Sync. The single-portasynchronous-to-synchronous feature makes itpossible to send asynchronous data over thesynchronous network.• Nondisruptive Diagnostics. When set up to usenondisruptive diagnostics, the DSU sendsdiagnostic data without interrupting or disruptingcustomer data.• NMS control. The DSU can be controlled byCOMSPHERE 6700 Series NMS. The 6700 SeriesNMS operates using Advanced Diagnostic protocol(ADp).The Model 3550 DSU requires a hubbing devicefor connection to the NMS; the Model 3551 DSU isconnected to the NMS through the shareddiagnostic unit (SDU) in the COMSPHERE3000 Series Carrier.1