Amphenol's Rugged 156-Channel 50G/400G PAM-4 Ethernet Switch Box is conduction cooled and configurable for system connectivity, speeds, port types, and interoperation with various high-speed media converters and connectors for system interfacing. This switch box features 12 copper ports and 144. Mini Cool Edge is a 0. 60 mm high-density, high-speed card edge connector for new-generation small form factor systems. The fine-pitch solutions in vertical orientation are now available for a complete interconnect solution. 60 mm meets SFF-TA-1002, OCP NIC 3. This gives you the flexibility to build powerful and secure networks, even in harsh environments: copper and FO ports, as well as redundancy. PAM4 is a branch of the pulse amplitude modulation (PAM) technology, which is a mainstream signal transmission technology following non-return-to-zero (NRZ). Figure 1-1 shows the typical waveform. The Broadcom® BCM87840 is the industry's highest-performance and lowest-power single-chip 400GbE PAM-4 PHY transceiver capable of driving four lanes of 106-Gb/s PAM-4 at 53 Gbaud, while supporting DR4, FR4, LR4, and QSFP112 optical links. The BCM87840 leverages Broadcom's market-leading 7-nm PAM-4.