CBUQBR User Manual80-14004000-011–61.4.4 Jumpers and LinksFront card:These are all factory set and must not be changed.Jumper Description(F=Factory Set)JP1-3 - Not usedJP4 - Clock postJP5 OUT (F) Watchdog timer enabledJP6 OUT (F) Rear card absence enables re-bootJP7-11 MASTER (F) System Bus Master operationSLAVE System Bus Slave operationRear card:Jumper Description(F=Factory Set)JP1 OUT (F) Tx ISDN line 1 termination disabledJP2 OUT (F) Rx ISDN line 1 termination disabledJP3 OUT (F) Tx ISDN line 2 termination disabledJP4 OUT (F) Rx ISDN line 2 termination disabledJP5 OUT (F) Tx ISDN line 3 termination disabledJP6 OUT (F) Rx ISDN line 3 termination disabledJP7 OUT (F) Tx ISDN line 4 termination disabledJP8 OUT (F) Rx ISDN line 4 termination disabled