The RQ-100GDO25-XXXX series single mode transceiver module is designed for multiple channel 100GbE transmissions for up to 25km distance over standard G.652 single mode optical fiber (SMF) . The transceiver operates at a data rate of 100Gbps at the nominal DWDM wavelength from 1295.56nm to 1312.58nm as specified by the CW-WDM MSA. This module can convert 4 channels of 25Gbps (NRZ) electrical input data to 1 channel of 100Gbps (PAM4) optical signal, and also can convert 1 channel of 100Gbps (PAM4) optical signal to 4 channels of 25Gbps (NRZ) electrical output data. The electrical interface of the module is compliant with the OIF CEI-28G-VSR and QSFP28 MSA. It is designed to deploy in the RQ-100GDO25-XXXX SeriesQSFP28 100G O-Band DWDM 25KM SM LC Transceiver DWDM networking equipment in metropolitan access and core networks