ATOP XG-PON&GPON OLT Class D is a combination of XG-PON OLT and GPON OLT optical transceiver in a SFP+ housing, and it is compliant to ITU-T G.987.2 XG-PON and ITU-T G.984.2 GPON standard. This module can support XG-PON and GPON over a single fiber via coarse wave division multiplexing. XG-PON feature supports 9.953 Gbps continuous-mode transmission by 1577nm EML laser and 2.488 Gbps burst-mode reception by 1270 nm PD/TIA. GPON feature supports 2.488 Gbps continuous-mode transmission by 1490 nm DFB laser and 1.244 Gbps burst-mode reception by 1310 nm APD/TIA. It has been designed to meet the harshest external operating conditions that include temperature, humidity and EMI interference. The module offers very high functionality and feature integration, accessible via a two-wire serial interface.