Several different forms and applications of DAC products
Time: 2020-03-29
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 0G 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.
Figure 6 100G QSFP28 to 4*SFP28 DAC
III. DAC high-speed cable applications
DAC are generally used on switches in data center server rooms, and DAC can be active or passive.
Figure 7 high-speed cable applications
Moduletek Limited the products involved in the above application guide, welcome to buy them.
If you have any questions about the above content, you can contact us by Email : web@moduletek.com