A non-blocking telecommunications node comprising a plurality of ports. Each port adapted to pass telecommunications traffic comprising multiplexed signals. Each port is adapted to receive an incoming multiplexed signal comprising a plurality of component signals each having a predetermined wavelength. The node includes a plurality of transponders each arranged to receive a component signal. The plurality of transponders are arranged and connected to the ports such that each instance of a component signal having a specific wavelength received by each of the ports can be received simultaneously by the transponders. A node for adding component signals to an outgoing multiplexed signal is also disclosed.