5 piece Wentronic TAE adapter (plug F on RJ45 (8P2C) clutch) (Electronics)
Who should know: When RJ45 Pin 1 and 8 are used. The plug does what it should. !!! But beware: it is wider than a "normal" TAE plug! If you (like me) multiple sockets on the PBX has closely next to each other, the plug will not fit side by