-These adapters are designed to convert RJ11 and RJ45 type plugs to another connection

-This could be RJ11 to UK, ideal for attaching a fax machine to a standard BT socket, or it could be a simple modular connector to attach two RJ45 cables together

-Converts a single phone jack into five jacks so you can plug in five devices such as telephones, fax machines, modems, answering machines, etc. keyed to accept a modular phone cord