An optical transceiver formed onto a conventional low-cost printed circuit board with integrated optical waveguides is presented. The transceiver incorporates an optical multimode polymer Y-splitter formed directly on a low-cost singlelayered FR4 substrate enabling duplex transmission along a single optical fibre. The transmitter and receiver assemblies are mounted onto the board using methods common to conventional PCB manufacturing. Simple through-board connectors, compatible with pick-and-place assembly technology, are used to interface the electrical and optical layers of the board. This approach allows end-fired optical coupling between the active devices and optical waveguides on the board. The demonstrated transceiver, intended as a board-level optical network unit, achieves error-free data transmission for both Tx and Rx modules at 10 Gb/s.