The QSFP-40G-ACC10M direct attach copper cable assembly (also known as DAC) is suitable for very short distances and offers a highly cost-effective way to establish a 40 Gigabit link connectivity between devices using QSFP ports. FS 40G DAC cable, passive/active DAC from 0. 5m to 10m, cost-effective alternative to connect two 40G Ethernet ports of network switches. Trusted by 260K+ Enterprise Users. These cables provide low-latency, high-bandwidth solutions suitable for modern data center demands. 3125Gbps data rate per channel. These cables offer seamless QSFP+ to QSFP+ or QSFP+ to 4×SFP+ breakout configurations, ensuring.