I have a VOIP phone connection with a multi-unit cordless phone system (5.8 GHz). I have no phone jacks in any room. Now I need to connect a fax machine in a room far from where the modem and phone-base is located. Can I use a wireless phone jack to connect the fax (such as http://www.amazon.com/RCA-RC926-Wireless-Phone-Jack/dp/B00000J08Q)? Will that interfere with the cordless phone system or my wireless router (802.11n)? Or can I buy a new cordless phone system that allows me to plug in an external phone device on a remote unit?... I don't know if anyone makes something like this. Or any other ideas except for running a very long phone wire?