50G SFP56 DAC (Direct-attach Cable)cables are made of twinax copper cables, operating at data rates of up to 53.125Gbps (26.5625GBd PAM4). It provides a cost-effective, low power alternative to 50G optical SFP56 connections. It is assembled from two 50G SFP56 modules heads with fixed cable lengths. 50G SFP56 DAC is a good option for short-distance interconnections within racks and across the adjacent racks, with the advantage of high reliability and low power consumption, and is widely used in data centers and 50 gigabit Ethernet applications. 50G SFP56 DAC is compliant to SFF-8431 specification. AscentOptics could provide high performance 50G passive copper cables with ranges from 0.5M to 3Meters. Supports a wide compatibility with different system equipment.