DAC high-speed cable (Direct Attach Cable) is generally translated as direct cable, direct connection copper cable or high-speed cable.High- speed cable is a low-cost, short-distance connection solution that replaces optical modules. Both ends of the high-speed cable have got module cable assemblies, and the ports cannot be replaced. The module head and copper cable can't be separated, but compared to optical modules.The connector module on the high-speed cable does not have expensive optical lasers and other electronic components, thus greatly saving costs and power consumption in short-distance applications.

Huawei high-speed cable classification

1.10G SFP + to SFP + high-speed cable

The 10G SFP + to SFP + DAC uses a passive dual-axis cable assembly and is directly connected to the SFP + module.It features high density, low power, low cost, and low latency.

2.40G QSFP + to QSFP + high-speed cable

40G QSFP + to QSFP + DAC provides a very cost-effective way to establish a 40G link between the internal rack and cross-rack QSFP + switch ports, increasing the backbone link from the access layer to the core to 40G / 100G, Due to its high speed and low latency.It is widely used in high- speed backbone networks, enterprise network switching and network storage.

3.40G QSFP + to 4 * SFP + high-speed cable

QSFP + to 4 * SFP + DAC has a 40G QSFP + interface at one end, which meets the requirements of SFF-8436, and four 10G SFP + interfaces at the various other end, which meets certain requirements of SFF-8432. According to the customer's requirements for the distance of the two ends of the cable, add a splitter in the middle of the cable to recognize that one 40G optical signal is certainly divided into four 10G signals.

5.25G SFP28 to SFP28 high-speed cable

25G SFP28 to SFP28 DAC can provide customers with 25G high-bandwidth data interconnection capabilities, comply with IEEE P802.3by Ethernet standard and SFF-8402 SFP28, and are trusted in data center or supercomputer center system scenarios.

6.100G QSFP28 to QSFP28 high-speed cable

100G QSFP28 to QSFP28 DAC can offer customers with 100G high-bandwidth data interconnection capabilities, providing 4 duplex channels, each channel operating rate can support up to 25Gb / s, aggregate bandwidth is 100Gb / s, in line with SFF-8436 specifications, applied to QSFP28 port connection between devices.

7.100G QSFP28 to 4 * SFP28 high-speed cable

100G QSFP28 to 4*SFP28 DAC One end includes a 100G QSFP28 interface, and the other end provides four 25G SFP28 interfaces, which can provide customers with 100G high-bandwidth data interconnection capabilities, consistent with SFF-8665 / SFF-8679, IEEE 802.3bj and InfinibandEDR standards.It really is widely used in data center or supercomputer center system scenarios.