D-Link DEM-331T SFP 1000BASE-BX-D BiDi Single-Fiber Gigabit Optical Transceiver

Basic Parameter Table

Core Product Features

1. D-Link long-distance bidirectional single-fiber gigabit SFP module, only one single-mode fiber core realizes transmit & receive, greatly saving fiber resource cost.
2. Matching rule: This model TX1550/RX1310 must pair with DEM-331R (TX1310/RX1550) to realize full-duplex bidirectional communication.
3. Complies with 1000BASE-BX BiDi standard, stable 40km transmission over standard single-mode fiber, suitable for cross-district branch networking with limited fiber cores.
4. Hot-swappable plug-and-play design, compatible with all D-Link gigabit SFP switches, no power-off required during equipment replacement for easy maintenance.
5. Moderate optical power budget, strong anti-fiber attenuation and anti-electromagnetic interference capability, supports 24/7 uninterrupted long-term outdoor private line operation.
6. Cost-effective long-distance single-fiber BiDi solution, ideal for network renovation projects lacking spare fiber cores.

Typical Application Scenarios

1. Point-to-point interconnection with insufficient single fiber cores: cross-town branch office, remote factory workshop monitoring backhaul within 40km single-mode fiber range.
2. Old campus wide-area network reconstruction, small enterprise remote branch gigabit private line access when only one spare single fiber is available.
3. Not applicable for multi-mode fiber; must be matched with opposite wavelength BiDi module for normal communication.