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NETWORK 8000 ISSUE: faceplate not communicating with central computer

To power down a Network 8000 cabinet, remove one of the two main fuses located towards the bottom inside of the cabinet.


If the trouble is occurring with multiple satellites in an area, the problem may be in the field communications wiring or the Communication Surge Board near the central computer. If you have determined the issue is with the communications surge board, check for blown fuses and replace if neccissary. (0.5A Fast Blow)

If the trouble is occurring with a single satellite location, follow the steps below.

  1. Check for proper indicator light operation on the modem PCB.
    • The light labelled "RX" illuminates to show any communication with any satellite connected to the communication wire path. This light should be blinking almost constantly.
    • The light labelled "TX" illuminates to show when the faceplate connected to this modem is sending a response back to the central. This light should blink occasionally
  2. If the "RX" light is on constantly, unplug the communication wire from the modem.
    • If the "RX" light remains on, plug the communication wire back into the modem and go to step 6.
    • If the "RX" light goes off, then the problem is likely not within the satellite cabinet. Check other satellites in the area for proper central communications.
  3. If the "RX" light is blinking but the "TX" light never blinks, then check the address settings on the faceplate. Instructions can be found HERE.
  4. If the "TX" light is on constantly, then go to step 6.
  5. If neither light is blinking, or if the "RX" light is blinking and the "TX" light never blinks, then check the modem's fuses
    • Verify that the fuse connectors that hold each of the fuses are not touching each other. If they are touching one another this will cause a short and disable communications.
  6. Try wiggling/adjusting/cleaning the faceplate-modem interconnecting cable at both ends to see if the faceplate begins to communicate with the central
  7. Try replacing the modem PCB with a known good unit.
  8. Try replacing the faceplate with a known good unit.
  9. Try replacing the faceplate-modem cable with a known good unit.
  10. If the communication issues are still not resolved, then check the field communications wiring.