Core Insights - The article discusses the significance of the 400G-SR8 optical module, highlighting its increasing usage in high-speed networking equipment like the MikroTik CRS812 DDQ switch [2][3]. Summary by Sections What is 400G-SR8 Optical Module? - The 400G-SR8 optical module operates at a speed of 400Gbps, designed for short distances of approximately 100 meters, and consists of 8 communication channels, each capable of 50Gbps [3]. Technical Specifications - Each SR8 module requires a total of 16 optical fibers (8 for transmission and 8 for reception) and is compatible with existing LC or MPO-12 cabling, although it necessitates MPO-16 APC cabling for optimal performance [3]. Electrical Characteristics - The SR8 modules typically utilize 56Gbps PAM4 or 50G PAM4 electrical interfaces, which are crucial for designing network connectivity at 400G and beyond [10]. Advantages of SR8 Modules - Compared to earlier generations like QSFP28 100G, the SR8 offers a more cost-effective solution due to its lower channel speed of 50Gbps and the use of separate optical fibers, making it suitable for standardization in most data centers [11]. Testing and Standardization - Initial testing with 400G-SR8 modules revealed that while they are effective, a more standardized approach is beneficial for diverse equipment types in data centers, as SR8 modules meet limited connection requirements effectively [11].