SM321B

Manufacturer reference

Manufacturer details describe the cited version. Confirm the exact unit and intended system.

Product type

1000Base-BX WDM Bi-Directional SFP Module

Standards and Protocols

IEEE 802.3z, TCP/IP

Wave Length

TX: 1310 nm, RX: 1550 nm

Cable

Single-mode fiber

Fiber Type

9/125 μm single-mode

Max. Cable Length

20 km

Data Rate

1.25Gbps

Port Type

LC Simplex

Power Supply

3.3V

Selection notes

• Specifications are from the manufacturer's official datasheet.
• ISD stock, price, Malaysian warranty and delivery are confirmed separately. Confirm the exact model suffix and supplied revision.

Official documents

• ISD datasheet (PDF): TP-Link SM321B
• TP-Link official source

Manufacturer source checked 2026-10-26. The supplied unit and local terms require confirmation.