The RS422 card on the DX8100 doesn't seem to function.
Pelco Video Management
- DX8100 all Models
Hardware failure causes PTZ outputs and keyboard input communications to fail.
Connect a CAT5 cable to the communication ports 1-4 on the back of the DX8100 that is non functional. using the 568B standard place the VOM test leads to the trasmit pair. There should be a constant 3-6 Volts DC.