Abstract: A modularized network component system that includes a transceiver module and a separate accessory module, and enables the transmissions range of the transceiver module to be augmented by the accessory module, is disclosed. According to one aspect of the present invention, an optical network includes a fiber, a first device, and a second device. The first and second devices are coupled to the fiber such that the second device is in communication with the first device through the fiber. The second device includes a first modular subsystem that is arranged both to transmit data and to receive data through the fiber. The first modular subsystem is substantially physically decoupleable from the second device and from the fiber such that the first modular subsystem may be readily replaced within the second device by another modular subsystem.