This is a must if you have digital telephone service. 
Now you can still use your rotary phone.
This will convert the pulse dialing from your cool old rotary phone to DTMF tones compatible with modern VOIP equipment.     
You can even dial* and # with it. Supports all rotary phones
 Needs no batteries. Allows you to dial *  and # 
 Six speed dial locations plus last number redial. Easy setup, just plug it in and use.

             This convertor is the Best on the market
 It will work with most providers. Others will not work   with AT&Tand certain other providers . The cheaper convertors will not work with Reverse polarity . Many homes have reverse polarity. This convertor works with both polarities. 
Now you can still use your wonderful rotary dial telephone. Just plug it in and your rotary telephone works like it did before.

Dialing on a quality rotary phone is great. The tactile heaviness of the dial, the finger stop. The smooth whirr of the gears, all provide you with the opportunity to slow down and think about how  things were earlier when life was somewhat better and not so fast paced. Its nice to forget about all those modern things for a while. There is nothing like an old phone when ringing fills the room as it would half a century ago. Works with low voltage VOIP like Magic jack and AT &T U-verse, Comcast and others. There are several kinds out there. This one is the best and its hassle free.