COMSPHERE –48 Vdc Central Office Power Unit2-6 October 2002 3000-A2-GB41-50Setting the Option StrapsThe option straps are screw switches that are set byraising (loosening) or lowering (tightening) the screw tobreak or make the contact. There are five option straps, S1through S5, on the CO Power Unit’s backplane (seeFigure 2-2).NOTEOlder power modules havestraps labeled S1 and S2. Theseshould always be in the raisedposition.Basic ModeIf you want to operate in the Basic mode, you must useone –48 Vdc power source and configure the option strapsas shown in Table 2-2.Table 2-2Settings for Basic ModeS1 LoweredS2 LoweredS3 LoweredS4 LoweredS5 LoweredTo set the option straps for Basic mode of operation: Procedure1. Tighten the screws on all five straps (S1 throughS5) on the CO Power Unit’s backplane. Make surethat the screws are securely touching the contacts,but do not screw the straps too tight because doingso can damage the equipment.S1S2S3S4S5CO Power Tray496-13695-01CO Power UnitBackplaneFigure 2-2. Option Straps (S1 through S5) on the CO Power Unit’s Backplane
