Extension unit for rtx wireless phone jackadd up to 4 wireless extension units to your rtx wireless phone jack 50 meters of wireless phone linefeatures if you want an extra telephone socket in your home you need to install wires and other equipment which can be both an expensive and time consuming affair telephone sockets are often in high demand in a home whether it be for plugging in a telephone fax machine dial up modem or even a set top box extra connectionfeatures the wireless pho