RT-BE86U USB ports - how much power do they provide?

[Qbcd]

Hello, I'm wondering if it would be possible to power an ONT and a DSL modem using the USB ports on the back of the RT-BE86U router. They are both 12V devices, so I would be using those 5V to 12V step-up USB to barrel plug cables. Neither device uses more than 5W, so if the ports can provide 1A, it would work. But I can't find the power rating of the ports anywhere.

I know you'll say not to do it, but I'm wondering if anyone has tried it and if has worked, and/or what the actual spec of the USB ports is. I remember years ago reading about someone powering an ONT from an Asus router, but I can't find it now.

 

[Richard1864]

Hello, I'm wondering if it would be possible to power an ONT and a DSL modem using the USB ports on the back of the RT-BE86U router. They are both 12V devices, so I would be using those 5V to 12V step-up USB to barrel plug cables. Neither device uses more than 5W, so if the ports can provide 1A, it would work. But I can't find the power rating of the ports anywhere.

I know you'll say not to do it, but I'm wondering if anyone has tried it and if has worked, and/or what the actual spec of the USB ports is. I remember years ago reading about someone powering an ONT from an Asus router, but I can't find it now.

1. The USB ports on routers aren't designed to power ONT's or modems.

2. The ONT and modems have to be plugged into the wall because they can easily use more than 5 watts under load.

3. If they're powered by the router then you'll never get online; ONT and modem have to already be fully powered BEFORE the router is turned on for the router to get online. That can't happen if they're powered by the router.

The USB ports can't even charge a cell phone, so they don't definitely can't power a modem or ONT. Tried it myself.