GPIBENET100_RevC9 firmware revision addresses the following issues:

- Some GPIB-ENET/100 units would fail intermittently by flashing error code 89 (8 long flashes, 9
  short flashes) on the PWR/RDY light.  Fixed this condition.

See the Getting Started Manual for your GPIB-ENET/100 for more information on updating the firmware.