Accelight’s ASP-PR-GU-20 Series is a transceiver for the optical network unit (ONU) of 10G GPON with 9.95328Gbps in downstream and 9.95328Gbps in upstream. ASP-PR-GU-20 series is high performance module for single fiber communications by using 1270nm burst-mode transmitter and 1577nm continuous-mode receiver. The transmitter section uses a DFB 1270nm laser and the receiver section uses an integrated 1577 nm detector preamplifier (IDP) mounted in an optical header and a limiting post-amplifier IC. CML interface is used for differential inputs and outputs. LVTTL logic control interface simplifies the interfaces to external circuitry.