YOLISTIC (Pack of 4 A Pair of Converter Adapters for RJ11 Male to RJ45 Female) & 2 In-Line Couplers

I had several old PBX lines that used a larger connector that I had to convert back to the 4 line size connector. Worked great. No quality issues.

I bought this as my modem router only has an Ethernet plug, and my house only has a phone jack. I couldn’t get the internet to work. I even tried using it in my old router, which works, but it couldn’t find internet. The second I stopped using it, I had internet again. I looked at the female end of the Ethernet connection, and noticed it only had 4 of the wires, instead of all 8. Not sure if that makes a difference. But either way, this product did not work for me.