Glossary
A
Active Optical Cable (AOC) |
A communications cable that requires external energy to convert electrical signals into optical signals or convert optical signals into electrical signals. The optical transceivers at both ends of an optical cable provide functions of photoelectric conversion and optical transmission. |
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B
Baseboard Management Controller (BMC) |
As the core of the Intelligent Platform Management Interface (IPMI) standards, the BMC is responsible for collecting, processing, and storing sensor signals, and monitoring the operating status of components of a server. The BMC also provides the hardware status and alarm information about the managed objects to the management module to implement central management. |
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busbar |
A copper bar or aluminum bar that connects the general switch of the power distribution cabinet and a branch circuit switch in the power supply system. Its surface is insulated, and it is mainly used as an electrical conductor. |
E
End of Row (EOR) |
A method of distinguishing switches based on the cabling mode. EOR switches are deployed in one or two cabinets at the end of a row. All servers in the cabinets are connected to EOR switches using horizontal cabling. |
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M
Middle of Row (MOR) |
A method of distinguishing switches based on the cabling mode. The connection mode of MOR switches is similar to that of EOR switches. Access switches are deployed in one or two cabinets in a cabinet group in a centralized manner. The only difference is that the network cabinet is located in the middle of the cabinet group. |
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S
Serializer/Deserializer (SerDes) |
A pair of functional blocks commonly used in medium- and long-distance high-speed communications. SerDes is often selected as the physical layer implementation solution of communication protocols such as PCIe, gigabit Ethernet, and optical fiber communication, and is widely used for high-speed communications between chips, between cards, and between devices. |
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T
Top of Rack (TOR) |
A method of distinguishing switches based on the cabling mode. ToR switches are deployed at the top of the cabinet. Servers in the cabinet are connected to the switches by using optical fibers or network cables, and the switches are connected to upper-layer aggregation switches. |
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Power Usage Effectiveness (PUE) |
A comprehensive indicator that is widely accepted and used by data centers in and outside China to measure the energy efficiency of data center infrastructure. |
