Universal connection unit for analog and digital networks , flush-mounted versions with metal frame , Version 2 x RJ45 2x8 (8): Both sockets are connected in parallel , Version 2 x RJ45 8/8 (8): Sockets are connected separately , Version with terminating resistors: Switchable 100 ohm resistor , 05300550, 05300549, 05300554, 05300553: With terminating resistor , AP: For surface mounting , UP: For flush-mounted mounting with frame and central plate for 'stand-alone installation' , UP50: For flush-mounted mounting with central plate for integration into all common switch ranges using TAE intermediate frame , UP0: For flush-mounted mounting without central plate for direct integration into all common switch ranges