Question Device to connect internet from USB to an ethernet cable ?

Jun 26, 2025
13
0
10
Hello! Maybe you can help me.

I have a Windows 10 computer, and connect to internet from the USB connector of a TP-Link Archer T9UH Ver. 2.0 antenna that receive the WIFI signal from a Sagemcom Fast 3890v3 router. I want to connect a total of 3 computers to internet with an Archer T9UH. The 3 computers have Gigabit and USB ports.
Found that a network switch could give internet to my 3 devices at the same time, but the problem is that the Archer has USB connector and a network switcher only has gigabit ports.
I found some adaptors on Amazon that convert USB to Ethernet, but I don't trust that they could work since no recognized brand produce them.

Thanks for your time!
 
Welcome to the forums, newcomer!

If you want to use the Archer T9UH, you'll need 3 adapter for 3 machines that will all pair to the router. You might want to do a personal assessment to see how much 2 more adapters will cost you as opposed to running all your machines using Ethernet cable;
fst_3890v3_2.jpg

considering you have access to 4 LAN ports to pair with RJ45 ports on your 3 machines.
 
Welcome to the forums, newcomer!

If you want to use the Archer T9UH, you'll need 3 adapter for 3 machines that will all pair to the router. You might want to do a personal assessment to see how much 2 more adapters will cost you as opposed to running all your machines using Ethernet cable;
fst_3890v3_2.jpg

considering you have access to 4 LAN ports to pair with RJ45 ports on your 3 machines.
Thanks for the detailed reply!
My connection is of 120 Mb download speed. I got 20 meters from the rooter to the 3 PCs. A cat.6 ethernet cable should work fine or for that length I need a cat. 7 or 8?
It could be a possible to make the following connection? Rooter - 20 meters length Ethernet cable - Internet switch (TP-Link TL-SG105) - Ethernet to each of the 3 PC's. Do you know which could be the drawbacks of this setting?
 
No cat7 or cat8 cables. Almost all fakes. Cat6 or even cat5e works for 20 meters distance.

So with a TL=SG105 switch (if you already have it) in between, all you need is just one 20 meter long ethernet cable to the router (not rooter) and 3 short ethernet cables to 3 PCs. Ethernet is always better than wifi.

You can also pull 3 20-meter long ethernet cables directly from the router if you want without a switch.
 
Last edited:
  • Like
Reactions: learnerguy
No cat7 or cat8 cables. Almost all fakes. Cat6 or even cat5e works for 20 meters distance.

So with a TL=SG105 switch (if you already have it) in between, all you need is just one 20 meter long ethernet cable to the router (not rooter) and 3 short ethernet cables to 3 PCs. Ethernet is always better than wifi.

You can also pull 3 20-meter long ethernet cables directly from the router if you want without a switch.
Thank a lot for your answer!
 
The idea is to connect the Archer adapter (with USB connection) to a network switch (only has RJ45 connectors). That's why I need a female USB to RJ45 connector.
Your TP-Link Archer T9UH is for wifi connection, not converting usb to rj45 ethernet. Your PCs also already have rj45 ethernet ports, why do you need extra usb to ethernet adapters? Unless they are laptops without rj45 ports and no wifi capabilities.
 
Your plan will not work as simple as that.

Very technically it is impossible to run multiple devices over a single wifi connection. The MAC address is part of the encryption keys so only the device with that mac address can use the connection.

So there are a couple of "hacks" that can make it work.

You can buy a wifi repeater/extender that has multiple ethernet ports. This device is designed to overcome the mac address limitation. The big BUT is the main router must have a feature on called WDS. This is something that is not part of the official wifi so not all routers have it and many have it turned off because it is actually a security feature to only have a single mac.

So if the main router has WDS or you have control of the main router and can turn it on a wifi repeater is a valid choice.

So if that is not a option you need to get creative.

1. You can use your pc as a router and use the internet sharing feature. You would plug a switch into the ethernet port and then plug all your machines into that. The main pc that has the wifi nic would provide communications for all the machines. I suspect at some point microsoft will remove this feature. It was orginally designed to share dial up phone modems. It still works but is extremely basic in function.

2. You can try to find a repeater that can in router mode. Hard to say again this is all non standard. A lot of tplink router can run as wifi repeaters in what they call universal mode. That will connect to most routers.
 
  • Like
Reactions: learnerguy
Your TP-Link Archer T9UH is for wifi connection, not converting usb to rj45 ethernet. Your PCs also already have rj45 ethernet ports, why do you need extra usb to ethernet adapters? Unless they are laptops without rj45 ports and no wifi capabilities.
Maybe a female USB to rj45 adapter could work because the closest point of access to internet is through the Archer that only has male USB connection. Then I could connect the rj45 to the network switch. But as

bill001g told, that could have MAC address problems.

 
Your plan will not work as simple as that.

Very technically it is impossible to run multiple devices over a single wifi connection. The MAC address is part of the encryption keys so only the device with that mac address can use the connection.

So there are a couple of "hacks" that can make it work.

You can buy a wifi repeater/extender that has multiple ethernet ports. This device is designed to overcome the mac address limitation. The big BUT is the main router must have a feature on called WDS. This is something that is not part of the official wifi so not all routers have it and many have it turned off because it is actually a security feature to only have a single mac.

So if the main router has WDS or you have control of the main router and can turn it on a wifi repeater is a valid choice.

So if that is not a option you need to get creative.

1. You can use your pc as a router and use the internet sharing feature. You would plug a switch into the ethernet port and then plug all your machines into that. The main pc that has the wifi nic would provide communications for all the machines. I suspect at some point microsoft will remove this feature. It was orginally designed to share dial up phone modems. It still works but is extremely basic in function.

2. You can try to find a repeater that can in router mode. Hard to say again this is all non standard. A lot of tplink router can run as wifi repeaters in what they call universal mode. That will connect to most routers.
Thanks for your detailed explanation!

My current router is controlled by my internet provider, so that is not an option.

Option 1: PC 1 is connected to internet through Archer device. I connected an ethernet cable from PC1 to
PC2 and configure as an "Internet connection sharing" (explained in this video:
View: https://www.youtube.com/watch?v=gR_Irr5VZJ8
) That worked but after resenting my computer stopped working and couldn't find why was that.

As cruisetung told, it seems that the best option will be to get 20 meters of cat. 6 ethernet cable from the router to my pc zone, connect it to a network switch (TP-Link TL-SG105 is a good one?), and from there 3 ethernet cables to each computer.
 
I completely agree if you can run a cable from the main router to the remote room that is always the best option. That is a very well liked switch. It doesn't matter a real lot all those small switches use the same chip inside and they haven't changed it in many years so it is extremely stable. Mostly the difference is the warranty, all electronics can fail. That said I have a tplink switch that is over 10 years old and still runs fine.

No matter how good wifi is you always get random transmission errors which mostly causes no issues....unless you are playing online games.
 
  • Like
Reactions: learnerguy
A added note that unfortunate is needed. There are massive numbers of fake ethernet cables sold that do not meet the specs. It is even more important when you are buying longer cables.

You still need nothing better than cat5e or cat6 if its cheaper BUT it must actually meet those specifications. The biggest thing to avoid are those flat or thin cables.
In the ad for the cable make sure they specify that the wire is pure copper, and it must have wires size 22-24 awg, Find a different vendor if you can not find that information.
 
  • Like
Reactions: learnerguy
I completely agree if you can run a cable from the main router to the remote room that is always the best option. That is a very well liked switch. It doesn't matter a real lot all those small switches use the same chip inside and they haven't changed it in many years so it is extremely stable. Mostly the difference is the warranty, all electronics can fail. That said I have a tplink switch that is over 10 years old and still runs fine.

No matter how good wifi is you always get random transmission errors which mostly causes no issues....unless you are playing online games.
Great!

I don't play online games. 👍
 
A added note that unfortunate is needed. There are massive numbers of fake ethernet cables sold that do not meet the specs. It is even more important when you are buying longer cables.

You still need nothing better than cat5e or cat6 if its cheaper BUT it must actually meet those specifications. The biggest thing to avoid are those flat or thin cables.
In the ad for the cable make sure they specify that the wire is pure copper, and it must have wires size 22-24 awg, Find a different vendor if you can not find that information.
I will definitely check on pure copper and 22 to 24 awg. Thanks those the tips!