INSTALLATION
Connect Cabinets
The Time Division Multiplex (TDM) bus extender cable and the intercabinet #6 AWG ground wire must be connected between cabinets. The TDM bus terminates on each side of the cabinet, and the intercabinet #6 AWG ground wire connects to the ground block at the rear of each cabinet.
Note: Make certain that the address plug is installed in the rear pin field of each cabinet (see Figure
TDM Bus Connections
One end of the TDM bus is terminated by resistors mounted on the ZTN129 or ZTN130 (R3) CP. This CP is always in slot 1 of Cabinet 1. The other end of the TDM bus is terminated by a Bus Terminator that plugs into the upper pin field of the topmost carrier (which may, of course, be the only cabinet). These connections are shown in Figure
Whenever a cabinet is added, the Bus Terminator must be moved to the end of the bus on the new top cabinet. This can be either slot 1 or slot 12, depending on the number of cabinets and how the TDM bus extender cable is run.
When removing a Bus Terminator and TDM bus extender cable, take care not to bend the backplane pins.
1.Verify that the Bus Terminator is in the proper position:
●Slot 12 of Cabinet 1 for
●Slot 1 of Cabinet 2 for
●Slot 12 of Cabinet 3 for
2.See Note. For 2- and
Note: When properly installed, the light blue stripe on the extender cable is at the bottom of the cable and the lettering on the cable (SER=1, for example, is right
