4 prong plug - RJ 11 adapter
4 Prong plug adapter to modular plug .
Now you need no conversion
Posted by Steve Olsen on 22nd Feb 2014
This was exactly what I needed ant it worked perfectly.
Right Part, Right Price
Posted by J. Rogers on 14th Aug 2013
Exactly what I needed. Love my phone and love the help from the Old Phone Shop.
Posted by Mike on 21st May 2013
This product enabled me to enjoy my vintage E-bay phone find. Thanks Old Phone Shop.