How does the telephone line connect with the cat? (the telephone line has no connection, just two copper wires)
It's better to make two wires into a crystal head, then go to the market and buy a conversion box
Why do you do it yourself? Just fix it and they'll change it for you, and it's free.
You can even, you can put the crystal head with scissors, there is even line connected to a telephone line can be!
