About TP-LinkTL-SM321A 1000Base-BX WDM Bi-Directional SFP Module

TP-LINK´s TL-SM321A adopts the latest standard 1000Base-BX, transmission over a single strand of fiber, with one different wavelength going in each direction. You can extend the network distance up to 10Km with TP-LINK´s Routers, Switches, Media Converters to provide high speed and stability.


  • Adopts the latest standard 1000Base-BX.
  • Up to 20 km transmission distance in 9/125μm SMF (Single-Mode Fiber).
  • Compatible with Small Form Pluggable Multi-Source Agreement (SFP-MSA).
  • Supports Digital Diagnostic Monitoring (DDM).
  • Supports Hot Swappabl.
  • WDM Bi-Directional SFP Module.
  • Supports WDM Bi-Directional technology, using a single strand of fiber, cost saving.
  • Work with TL-SM321B as a pair.

Package contents:

  • SFP Module TL-SM321A
  • Installation Guide

Hardware Features

  • DDM: Yes
  • SFP-MSA: Yes
  • Hot Swappable: Yes

Media Converter & Module

  • Standards and Protocols: IEEE 802.3z, TCP/IP
  • Wave Length:
    • TX: 1550 nm
    • RX: 1310 nm
  • Dimensions (W*D*H): 2.2*0.6*0.5 in (55.4*14.6*12.9 mm)
  • Power Supply: 3.3 V
  • Safety & Emission: FCC, CE
  • Cabel: Single-Mode Fiber
  • Fiber Type: 9/125 μm Single-Mode
  • Max. Cable Length: 20 KM
  • Data Rate: 1.25 Gbps
  • Port Type: LC Simplex
  • Environment  
    • Operating Temperature: 0–70 °C (32–158 °F)
    • Storage Temperature: -40–85 °C ( -40–185 °F)
    • Operating Humidity: 10–90% RH, Non-Condensing
    • Storage Humidity: 5–90% RH, Non-Condensing
Brand TP-Link
Shipping Weight 0.0700kg
Shipping Width 0.150m
Shipping Height 0.040m
Shipping Length 0.210m

3-Year Limited Warranty

Need more information or assistance with this product?

Contact us on 1300 665 970 or complete an online enquiry and one of our staff members will get back to you as soon as possible.


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