Network phone will provide two RJ11 interfaces generally. OneRJ11 interface for connecting HomePNA phone line connected to theswitch, the other RJ11 interface connects the telephone. RJ11 NetworkAdapters are the most common connection method which is applied in yourhome or office. Phones are plugged in this common non-reverse wire.There are six pairs of copper wire at the end of RJ11 Network Adapterswhich is distinguish by different colors, usually only four pairs ofcopper wire will be used. Four pairs of copper wire of RJ11 NetworkAdapters used are usually directiving by black, white, red and green.Two pairs of copper wires which is black and white provide channels forlow-voltage signals such as telephone and optical signals under normalcircumstances. Red and green two pairs of copper wire is mainly used forvoice or data transmission. In addition to find RJ11 plug in the phone,RJ11 can also be found on the computer modem, especially in RJ11Network Adapters. Now voice gateway, or ip phones are basically two wireline of RJ11 Network Adapters. As long as this two lines' interfaces isconnecting, it can be uesd at normal. If the direction is reverse,there woule be no sound at all.