Four Prong to Modular RJ-11 Telephone Line Converter / Adapter 318b<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>You can use old rotary telephones with most modern systems - including most VOIP systems!</li><li>Brand new</li><li>individually bagged</li><li>quality unit， made in Taiwan for us to our specifications</li><li>Old Western Electric part number: 318b</li></ul></div><img src="http://ecx.images-amazon.com/images/I/31eQSRAM8wL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/31jTVwGecML.jpg" noproxy>