Several different forms and applications of DAC products

I. DAC high-speed cable

Direct Attach Cable is generally translated as direct cable or direct-attach copper cable, usually procured in fixed lengths, with fixed connectors at both ends of the cable assembly, non-replaceable ports, and the modular head and the copper cable cannot be separated. Due to its low cost, ease of use and reliability, DAC has a huge share in the IDC market. The following is a brief introduction about the different forms of DAC and their applications.

II. DAC high-speed cable form factor

2.1 10G SFP+ to SFP+ DAC

10G SFP+ to SFP+ DAC uses a high-speed cable assembly that can be directly connected to the SFP+ port of a switch or NIC, featuring high density, low power, low cost and low latency.

Figure 1 10G SFP+ to SFP+ DAC

2.2 25G SFP28 to SFP28 DAC

25G SFP28 to SFP28 DAC can provide customers with 25G high-bandwidth data interconnect capability, which is compliant with IEEE P802.3by Ethernet standard and SFF-8402 SFP28, and is widely used in data center or super-computing center system scenarios.

Figure 2 25G SFP28 to SFP28 DAC

2.3 40G QSFP+ to QSFP+ DAC

40G QSFP+ to QSFP+ DAC provides a very cost-effective way to establish 40G links between internal rack and cross-rack QSFP+ switch ports, upgrading the access layer uplink to the core backbone to 40G, and is widely used in high-speed backbone networks, enterprise network switching, and network storage for its high speed and low latency.

Figure 3 40G QSFP+ to QSFP+ DA

2.4 40G QSFP+ to 4*SFP+ DAC

One end of the QSFP+ to 4*SFP+ DAC is a 40G QSFP+ interface, which meets the requirements of SFF-8436, and the other end is four 10G SFP+ interfaces, which meets the requirements of SFF-8432, and is used for connecting the 40G devices and 10G devices.

Figure 4 40G QSFP+ to 4*SFP+ DAC

2.5 100G QSFP28 to QSFP28 DAC

100G QSFP28 to QSFP28 DAC can provide customers with 100G high-bandwidth data interconnection capability, providing 4 duplex channels, each channel can support the operating rate up to 25Gb/s, and the aggregation bandwidth is 100Gb/s. It complies with the SFF-8436 specification, and is used for connecting between devices with QSFP28 ports.

Figure 5 100G QSFP28 to QSFP28 DAC

2.6 100G QSFP28 to 4*SFP28 DAC

100G QSFP28 to 4 SFP28 DAC where one end is a 100G QSFP28 interface and the other end is four 25G SFP28 interfaces, which can provide customers with 100G high-bandwidth data interconnection capability, compliant with SFF-8665/SFF-8679, IEEE 802.3bj, and Infiniband EDR standards, and is widely applied to data center or super-computing center system scenarios.