Interface modules (line cards) Huawei depending on the type and functions are divided into the following types: Main Processing Unit (MPU) - Main Processor, Switch Fabric Unit (SFU) - Switching block, Centralized Monitoring Unit (CMU) - Centralized monitoring unit, Line Processing Unit (LPU, also called interface card or line card) - Linear Processor (LPU, also called interface card or line card, and others.
These modules add functionality to existing modular routers or switches. Each Huawei series or sub-series has its own interface modules, line cards, processor and network devices.
These modules can expand the functionality at high speeds, such as 100GE, or increase the performance of a router or switch. Huawei.
For convenience and understanding of the module, you can use this table, by decoding part numbers Huawei. For example, a part number of this kind: 
decrypted as follows according to this table: module Huawei CE series, with 24 ports 40GE QSFP
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Identifier
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Meaning
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Description
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A
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Brand
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It is fixed as CE, representing CloudEngine.
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B
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Line card type
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- L: Line Processing Unit for CE12800 series switches
- F: Flexible Service Unit for CE12800 series switches
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C
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Number of interfaces on the card
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For a line card with different types of interfaces, this field stands for the number of downlink interfaces. It has two digits. The first digit is 0 if the card has fewer than 10 interfaces.
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D
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Interface rate
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- G: GE interface
- X: 10GE interface
- Y: 25GE interface
- L: 40GE interface
- C: 100GE interface
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E
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Interface type
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- T: Base-T interface
- S: SFP/SFP+ interface
- X: XFP interface
- Q: QSFP+/QSFP28 interface
- F: CFP/CFP2/CFP4 interface
- C: CXP interface
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F
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Line card specifications
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- BA/EA/EC/EC1/MC/MC1: basic specifications
- ED/EF/EG/FD/FD1/FG/FG1/SD/MD: enhanced specifications
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Specifications of the interface module Huawei ES5D21Q02Q00:
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Model
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ES5D21Q02Q00
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Basic functions
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Provides two 40GE QSFP+ optical ports for data access and line-rate switching. Each 40GE port can be split into four 10GE ports.
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Hot swap
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Supported
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Service port stacking
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Ports on the card can be used as stack ports.
NOTE:
A 40GE port cannot be used as a stack port after it is split into four 10GE ports.
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Physical specifications
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Dimensions (W x D x H): 100 mm x 208 mm x 40 mm (3.9 in. x 8.2 in. x 1.6 in.)
Maximum power consumption: 9 W
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Environment parameters
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Operating temperature: 0°C to 45°C (32°F to 113°F)
Relative humidity: 5% to 95%
Storage temperature: -40°C to +70°C (-40°F to +158°F)
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