"I wanted to move the existing phone socket and afterwards it didn't work. I shortened the wire from where it was damaged with the tacks and still nothing. The box only had 5 terminals in it for some reason. Fearing a big call out charge from phone line supplier I bought this one and it had 6 terminals for 6 wires and was very easy to assemble and it worked. Woo woo saved myself a fortune. Very pleased."