In this case check to make sure that the MMH900 mux has the appropriate virtual channels selected. Virtual channels are selected with dip switches 6 through 8. When programming, the destination channels have to match the virtual channels selected. When programming the mux use the virtual channel number , for example physical channel 1 is set for virtual channel 17 : ATC17B9600&W ( NOTE , In this example virtual channel 17 was programed and not physical channel 1 ) .
