07
2025
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07
Is a 1.25g optical module a Gigabit module?
Author:
Yes, a 1.25G optical module is a Gigabit module.
This is because "Gigabit" in Ethernet standards usually refers to an effective data transmission rate of 1Gbps (1000Mbps) while 1.25Gbps is the transmission rate of the optical module at the physical layer.
During data transmission, Ethernet frames contain additional overhead such as preamble and inter-frame gaps (used to ensure data synchronization and transmission reliability). In order for the actual effective data rate after deducting this overhead to still reach 1Gbps, the physical layer needs to design a higher transmission rate to "offset" the overhead loss - the 1.25Gbps physical rate exactly meets this requirement.
Therefore, the 1.25G optical module is specifically designed for Gigabit Ethernet (1000BASE-X), and its core function is to achieve 1Gbps effective data transmission, which is a standard Gigabit optical module.
1.25G optical module
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