COMSPHERE 3550 Series Data Service Units2-6 July 1999 3550-A2-GB20-40Connecting to the NMSA 3600 Hubbing Device is required to connect thecontrol DSU to the 6700 Series NMS. When connected tothe NMS, the DSU can be controlled and configured fromthe NMS rather than from the DCP alone. Procedure1. Plug the 4-pin modular plug of the 3600 HubbingDevice (Figure 2-3) into the DSU jack labeledCC/DC.2. Plug one end of an M6BJ cable into the hubbingdevice jack labeled CC IN/DC OUT.3. Plug the other end of the 8-pin M6BJ cable intothe 8-pin end of the 873A adapter.4. Plug the D-type end of the 873A adapter into theappropriate 6700 Series NMS jack.Refer to your COMSPHERE 6700 Series NMSdocumentation to control and configure the DSU from theNMS.496-14576aNMS NETWORKCONNECTIONCC/DCHUBBINGDEVICELOW VOLTAGEAC POWER INTONMS (873A)3000HUBBING DEVICEMODEL #3000-F3-300Figure 2-3. Model 3550 DSU NMS ConnectionConnecting to the Dial (or PSTN) NetworkIf your DSU is equipped with a V.32 DBM, refer toFigure 2-4 as you follow these steps. Procedure1. Plug either end of the dial (analog) interface cableinto the DSU jack labeled BACKUP.• Permissive service – telephone cord with 6-pinmodular RJ11C plug• Programmable service – telephone cord with8-pin RJ45S plug2. Plug the other end of the cable into the modularjack provided by the telephone company, USOCRJ11C (permissive) or USOC RJ45S(programmable).3. If your site has programmable service, verify thatthe DSU’s hardware strap S1-1 is switched to theOFF position.Figure 2-4. Model 3550 DSUDial (PSTN) Network Connection
