Phonex PX211-D Easy Jack 2 Wireless Web Jack System - Data Only | Wireless Data Transfer Solution for Remote Monitoring & Industrial Applications | Perfect for SCADA, IoT Devices & Secure Data Networks

I DO RECOMMEND THIS ITEM.Here's a little story about the first one that I bought:The original unit that I bought was a "Phonex PX-211 Wireless Web Jack System". NOTICE that model doesn't have the "D" in the name. I don't know what the difference is but the original was a dud.Per the instructions, I plugged in the base then plugged in the remote module. The dialtone did appear on the remote end but sounded like a garbage truck was hemorrhaging on the other end of the line. Then the signal disappeared and the modules refused to connect ever again (even after resetting per the instructions). I even tested the two modules when connected to the SAME OUTLET and also tested with other nearby outlets. The modules permanently divorced each other, never to speak again. By that I mean the green "synch" light remained red for all eternity.Amazon made it ridiculously simple to return this defective item. THANK YOU Amazon. You rock! THIS is why I continue to buy from Amazon. I understand that sometimes you get a dud and returns are necessary. Amazon takes all the pain away from this process.Note: After returning the original dud, I proceeded to purchase THIS item:Phonex PX-211D Wireless Web Jack System( http://www.amazon.com/gp/product/B000MRN0LM/ref=oh_details_o00_s01_i00?ie=UTF8&psc=1 )I don't know what the "D" on this model is for but it was $3 more so I didn't care or mind.The Phonex PX-211D worked instantly and continues to work flawlessly for a dedicated fax machine. The base is in the living room in an outlet near a number of power strips which support a bunch of electronics (cable modem, stereo receiver, TV, DVD, Cable box, etc.). The remote module is in the kitchen, definitely on a different circuit. I expected some level of static and some fax retries but no, still works flawlessly. I'm very impressed.