The Optical Transceiver Module CC-OSFP04SR4-12D is a high-performance, hot-pluggable solution designed for next-generation data centers and high-speed networks. It supports 400G Ethernet and InfiniBand NDR applications with a reach of up to 100m over OM4 fiber. There are two common types of 400G transceiver packages: OSFP and QSFP-DD. For 400G optical. A key new modulation scheme, PAM4, was introduced around 2017 and enabled the big jump from 100G to 400G. When it comes to enabling 400G and higher Ethernet speeds, a four-level pulse amplitude modulation or PAM4 multilevel signaling is needed as opposed to the non-return-to-zero (NRZ) modulation. Uses MACRS depreciation table to derive 'value used' of a fiber plant. − Objectives optimizing for 10km reaches unlikely to yield cost optimized solutions for sub 500m reaches. 125 GBd, PAM4 optical interface using standard single-mode fiber with reach up to at least 500 m, and host-module electrical interfaces for hosts with DSP based SerDes and RS(544,514). The module converts 4 channels of 100Gbps (PAM4) electrical input data to 4 channels of parallel optical signals, each capable of 100Gbps operation for an aggregate data rate of 400Gbps.