In recent years, the construction of data centers is at a stage of rapid growth. At present, many companies have passed various information and communication systems, and have a large number of electronic information facilities and large-scale information network architecture. How to better use them and play their biggest role in making them more convenient and quick to manage has become the most concerned issue for many companies. Fiber optic cabling is a key part of the data center. How do data centers choose fiber optic cabling? In this article, Yifeiyang Communications will give you a detailed introduction.
There are two kinds of data center fiber cabling, one is AOC active optical cable, and the other is DAC high-speed cable. Here we introduce one by one.
DAC High Speed ​​Cable - In-rack Connection SolutionFirst introduce several DAC high-speed cables.
1:100G QSFP28 DAC Direct Connection Cable
100G QSFP28 cable assemblies are high-performance, cost-effective I/O solutions. High-speed cable assemblies meet and exceed 100 Gigabit Ethernet, InfiniBand EDR. And temperature requirements for performance and reliability. The cable complies with SFF-8436. Specification and provide connectivity between devices using QSFP ports.
2: 100GE QSFP28 to 25G SFP28 DAC Direct Connection Cable
The QSFP28 4x25SFP28 cable is a high-performance, cost-effective SFP28 and QSFP28 device interconnect. The hybrid cable complies with SFF-8402 and the set trigger - 8665 specification. It is to provide a low power, short reach interconnect application. Each line can transmit data at a rate of 25 Gb/s, providing an aggregate rate of 100 gb/s.
3:25GE SFP28 DAC Direct Connected Copper Cable
The SFP28 passive cable assembly is a high-performance, cost-effective I/O solution that connects to 25 Ethernet. The SFP28 copper wire allows hardware manufacturers to achieve high port density, configurability and very low utilization of the foundry and reduced power budget.
4:56G QSFP+ DAC Copper Cable
QSFP+ copper cable is compatible with SFF-8436. It is to provide a low power, short reach and interconnect. Each line can transmit data up to 14 Gb/s, providing an aggregate rate of 40 gb/s.
For the above, then the DAC cabling selection in the data center can be selected as follows:
In-rack wiring: 1-5 meters
The QSFP28 passive DAC high-speed cable includes QSFP28 to QSFP28 DACs and QSFP28 to 4xSFP28 DACs. Their ideal range of use is within 5m. The QSFP28DAC is an ideal solution for 100G short-distance connections instead of 100G optical modules. If your 100GbE network is deployed in a 5m rack, the QSFP28DAC passive high-speed cable is perfect for you.
AOC Active Optical Cable - Inter-rack Connection SolutionAOC active optical cable products are 200GQSFP-DD AOC, 100G QSFP AOC, QSFP+AOC, SFP28 AOC, etc. Each kind of aoc transmission length is different, so we must consider when selecting optical fiber wiring in the data center. Actual usage.
For example: There are two options for 100GbE cabling using multimode fiber between switches. One is to use the QSFP28 AOC active optical cable that is most suitable for 3-20 meters. Another option is to use the QSFP28 SR4 optical module with 12 cores
MTP OM3/OM4 fiber patch cords. The QSFP28 SR4 optical module and 12-cell OM4 MTP fiber jumper support 100 meters of data transmission.
The above is the introduction of fiber optic cabling solutions in the data center for everyone.
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