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Forum Discussion
30 m CAT6 cable length seems too long
I have tried using a UNIFI AP from an unmanaged 108 switch. It works off 1 m lengths of cable. But when attached to about 30m, the AP connects successfully for 30 seconds and then drops and reports...
The injector has always been placed by the AP. So distance shouldn’t be an issue.
The AP powers up and connects (temporarily). So power doesn’t seem to be the issue (but what do I know 🤷🏼♂️).
The AP powers up and connects (temporarily). So power doesn’t seem to be the issue (but what do I know 🤷🏼♂️).
SteveM58 wrote:
The injector has always been placed by the AP. So distance shouldn’t be an issue.
The AP powers up and connects (temporarily). So power doesn’t seem to be the issue (but what do I know 🤷🏼♂️).
When an electronic device initially powers up, it will start a series of checks (often called boot up). If the series of checks are not completed successfully, it will shut down. For a POE injector, I am sure the startup checks would include voltage, current, and polarity. These could be over specification, under specification, or incorrect. The device shutting down after 30 seconds would indicate the startup sequence is not being successfully completed.
This sequence points to either a bad cable or a bad or marginal device. Possibly to a bad AC power supply for the device.
Have you checked the AC power source where you are connecting the injector? Possibly low voltage, possibly hot and neutral reversed?
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