With the rapid rise of the Internet of Things, cloud computing, artificial intelligence, and big data applications, the data transmission rate of servers, routers, switches, and data storage devices is also increasing, and data centers will also face challenge of high bandwidth, high reliability, and low latency, especially the higher requirements for data transmission up to 400G.

To achieve high data transmission, the cost-effective, stable and reliable data transmission cables and connectors are necessary. At the same time, the DAC Direct Attach Copper has the advantages of high simplicity, flexibility, and low power consumption. It is a cost-effective solution for short-distance high-speed transmission in the data center.

ETU-Link will introduce the 400G DAC Direct Attach Copper for you in this blog.

Among various types of DAC cables, compared with SFP series (including SFP+, SFP28, SFP56), QSFP series (including QSFP+, QSFP28, QSFP56, QSFP-DD) are 4-channel data transmission, and the data capacity is larger, from 40G to 400G , such as 400G QSFP-DD is quite suitable for data center applications such as servers, routers, switches and data storage for current ultra-high data transmission.

Although the data rate of the SFP series is relatively low, due to the  use of LEONIzell® dielectric technology, the bending performance is better when wiring indoors, and the insertion loss is 10% lower than the industry average.

The 400G QSFP-DD DAC has a data rate of up to 425Gbps, adopts 8-channel 53Gb/s PAM4 modulation, and meets the requirements of 400G Ethernet and InfiniBand EDR. Available in various wire gauges from 28AWG to 30AWG. The length is 0.5 to 2.5 meters, with the advantages of low insertion loss and low crosstalk.

It is mainly used in switches, servers and routers, data center networks, storage area networks, storage area networks, high performance computing, telecommunications and wireless infrastructure, medical diagnostics and networking test and measurement equipment.

There are three types of 400G DAC, do you know them? 
1. 400G QSFP-DD to QSFP-DD DAC
2. 400G QSFP-DD to 2*200G QSFP56 DAC
3. 400G QSFP-DD to 8*50G SFP56 DAC

The above is the content brought by ETU-Link. If you want to know more about optical communication products, you can read the previous articles of ETU-Link to help you become a master in the optical communication industry.