ATX Board RJ12 Cables - RJ11 doesn't work / Need quality RJ12 for Power and Control

[Flask3328]

Good day,

Earlier today, I upgraded to 0.3.7 / 0.2.2 and was ecstatic to see the ATX board controls finally working. After some hit or miss troubleshooting, what I find is that RJ11 (4 pin) does not work with this board. It does not provide power nor does it facilitate controls from the JetKVM. A 4 foot RJ12 (6 pin) cable facilitates controls, but not power. The only cable I could get to work delivering both power and controls was the provided 18 inch cable that came in the box with the ATX board.

I have ordered off of Amazon another set of 3 foot and a 6 foot RJ12 cables off Amazon I'll receive later in the week, but I was curious if the documentation could be updated to give guidance on whether there are preferred cables or lengths that we should be using.

I am trying to set up the JetKVMs using a 3d printed 1U holder and run cables to the devices, but if power can only run 18 inches, I may have to change my design.

[Flask3328]

This is likely a me issue. I see some inconsistencies. So I went back to the 4 foot RJ12 cable and it powered the device for a few seconds then if I moved the cable in the plug (there is slight wiggle room) it would reboot. After a bit, it stopped powering off the 4 foot RJ12. Went back to the 18 inch and it worked fine. It is likely something with the cable or more likely the connector. I will see if it magically all fixes itself when I get other RJ12 cables in later this week. The 18 inch cable fits firm, no wiggle room. This is probably just a tolerances issue.

[Flask3328]

Good day,

With the new firmware released this week focused on providing ATX control extensions, I went and tested some RJ11 and RJ12 cables to use with the JetKVM. My vision was to provide power to the JetKVM via the USB-C input on the ATX board and mount the JetKVM on a 3d printed rack mount and feed the USB, HDMI and RJ11/RJ12 to the device forward facing on the rack.

Overall, the in hand 4 foot RJ11 and 5 foot RJ12 were disappointments. The RJ11 4-pin cables could not provide power to the JetKVM or execute commands. The 6-pin RJ12 cable could execute commands to power cycle the device, but was incapable of providing power to the JetKVM. While I was waiting for different cables, I could have sworn I got my RJ12 to pass power, but it was very flaky. Once the motherboard was turned on and providing power to the device via USB-A to C, it seemed to override the RJ12 input and spontaneously rebooted. Overall, neither of the in hand cables that I had sized for my environment worked well providing power and control reliably.

Over the past 24 hours I have received 2, 3 and 6 foot NECCABLES RJ12 cables from Amazon and in all 3 cases, in all 3 lengths the 6 pin cables pass both power via the ATX board and can send controls to the motherboard.

This is a great step forward, but we are still facing issues with if the device is powered via the ATX board and the RJ12 cable, it sees USB as being disconnected and you have no keyboard/mouse input into the KVM. So, we have power and controls, but there seems to be some missing logic inbetween the USB detection and ATX power. I can't move forward with deployment until that is sorted. Baby steps though, I guess.

USB-C 5v Power Adapter (connected to ATX board - works fine with y-cable on USB-C port)
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USB Power Adapter (Went with this for UL rating)

Security-01 AC Adapter - https://www.amazon.com/dp/B09JW2H7KK

Cables that didn't work
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(No Power and No Controls - RJ11 cable / 4 pin)

AmzPRO 4 Foot (RJ11) - https://www.amazon.com/dp/B089Q238HG

(No Reliable Power / ATX Controls work)

Volcora 5 Foot (RJ12) - https://www.amazon.com/dp/B0B4DSQBRQ

Cables that Worked - Providing Power to the JetKVM via USB-C Pass-Thru on ATX Board and Controls
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In ATX board box - 18 inch RJ12 cable

NECCABLES RJ12 Cables -

2 Foot: https://www.amazon.com/dp/B08BJ72TS8
3 Foot: https://www.amazon.com/dp/B08BJ11QVK
6 Foot: https://www.amazon.com/dp/B08BHVF6XS

TL; DR - ATX control board is only as good as the RJ12 cable that provides it power; RJ11 doesn't work, need RJ12 for 6 pins. Some RJ12 cables didn't work for power delivery, NECCABLES did at a 2/3/6 foot lengths. As per a different issue raised, there seems to be an issue with USB status and ATX provided power. If power via ATX RJ12 cable, USB will be shown as disconnected.