![1000Base-BX WDM Bi-Directional SFP Module [TL-SM321B]](https://iristechworld.com/wp-content/uploads/2025/08/TL-SM321B_1482981391505g-40x30.jpg "TL-SM321B_1482981391505g.jpg")
WDM Bi-Directional SFP Module
Supports WDM Bi-Directional technology, using a single strand of fiber, cost saving
1000Base-BX WDM Bi-Directional SFP Module [TL-SM321B]
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