Well, the problem with my camera isn't the RJ45 jack/keystone as I thought it was.
This is a camera that has been in service for a year or so, and has previously had no problems. Now, when I'm connected to my TPLink POE switch, the camera does not power-up. I have tried each of the other 3 POE ports on the switch, and the result is the same. I have tried new cables, and cables that work with other cameras, and still no success. There appeared to be a bit of corrosion on the keystone contact wires, but the problem remained after cleaning those to bright metal, and I definitely have continuity through the keystone to the Dahua camera cable.
If I use an external 12V power supply, connected to the 12V pigtail, the camera works just fine with the TPLink switch (not using the POE ports). If I use a POE injector (48V, 0.5A, single-port output), the camera also powers up and works just fine. I have a second TPLink POE switch, and the camera does not power up with that one either.
Any suggestions for what to do next? I really don't want to dedicate a separate POE injector, or 12V power supply to just this one camera.
This is a camera that has been in service for a year or so, and has previously had no problems. Now, when I'm connected to my TPLink POE switch, the camera does not power-up. I have tried each of the other 3 POE ports on the switch, and the result is the same. I have tried new cables, and cables that work with other cameras, and still no success. There appeared to be a bit of corrosion on the keystone contact wires, but the problem remained after cleaning those to bright metal, and I definitely have continuity through the keystone to the Dahua camera cable.
If I use an external 12V power supply, connected to the 12V pigtail, the camera works just fine with the TPLink switch (not using the POE ports). If I use a POE injector (48V, 0.5A, single-port output), the camera also powers up and works just fine. I have a second TPLink POE switch, and the camera does not power up with that one either.
Any suggestions for what to do next? I really don't want to dedicate a separate POE injector, or 12V power supply to just this one camera.