Instruction: Answer the given question by extracting information from the supporting document.

Input:
Question: Is the male side for telephone?  I already have an ethernet cable for the female end.
Document: With this adapter, all you need is a male to male ethernet cable to use Windows Migration assistant. No need to buy a special USB cable or use WiFi, which is painfully slow.
At less than $3.00 (with free Amazon Prime shipping), this was by far the lowest price that I had found for an Ethernet crossover adapter. It is nicely compact, and it just works. I connected two computers using a standard Ethernet cable which I already had, plus this adapter, and the setup has worked flawlessly.
Not many people even know what a cross over cable is or for. But, when you need one to plug something directly into a computer and bypass a network this small plug comes in very handy. Actually, all it does is to cross two wires in one end of a RJ 45 network jack. I have tried to wire one of these myself. it is possible, but very difficult to do.
Much better than buying a dedicated crossover cable; I can use it with any ethernet cable I have, and it works perfectly!
I ordered this adapter so that I could connect to computers. Unfortunately, I didn't have the correct Ethernet cable. I think it only works with T568B/ standard b cables. Be sure you have the right cable before you order this item.
I have had problems in the past where I go to some ones house to work on their computer and and they don't have internet connected to it. With this I can connect my laptop via 3g and then use this and a regular Ethernet cable to share my internet with the computer and download updates or necessary software. Great little doodad.
I don't often need a crossover cable, so carrying one around is annoying. You have to have it labeled properly so it doesn't get mixed up with straight ethernet cables, and it breaks easily so you have to rebuild or replace it. This little adapter is tiny, tough, and always there when you need. Whether the connection is two feet or fifty feet it doesn't matter because all you need as regular ethernet cable and this adapter.
I didn't purchase this item, but I wanted to add a note about it. You don't need this product to connect two computers if at least one of them has a gigabit ethernet port. The gigabit standard includes something called 'auto MDIX'. You can look that up if you're curious. It is also implemented in some newer 10/100 ports. Overall, just try to use a regular ethernet cable. If that doesn't work, this item might be required.
You most likely need two of these for one ethernet cable. I was trying to set up a home LAN. I found out I needed a crossover cable. Nothing in any instruction said I needed two adapter to use one of my many ethernet cable. sigh. I had to order another one and wait. Anyway, learn from my mistake. I'm a psychologist not a computer science person. Hope this helps someone.
These are great for connecting PC to industrial ethernet devices and save an extra cable in your bag. Only downside is the clip is not protected so many of them have broken off.
Answer: This is not the adapter you need. A household telephone jack is an RJ11. This is an RJ45. This product converts a standard Ethernet cable into a crossover cable. These are rarely needed these days. The GigE specification requires auto MDI-X.