Description

High-performance WDM Bi-Directional SFP Module for stable gigabit fiber connections.
The TP-Link TL-SM321B-2 is a high-performance WDM Bi-Directional SFP Module that supports transmission distances of up to 2 km over 9/125 _m Single-Mode Fiber. Developed in accordance with the Small Form Pluggable Multi-Source Agreement (SFP-MSA), this module integrates a Digital Diagnostic Monitoring (DDM) feature compatible with SFF-8472, allowing real-time monitoring of the transceiver's parameters such as temperature, optical power, and current. Ideal for short-to-medium distance fiber networks, it ensures fast and stable gigabit connections for switches, routers, and servers.

Key Features

  • Adopts the latest standard 1000Base-BX
  • Up to 2 km transmission distance in 9/125 _m SMF
  • Compatible with SFP-MSA
  • Supports Digital Diagnostic Monitoring (DDM)
  • Supports Hot Swappable

Technical Specifications

Specification Value
Package ContentsSFP Module TL-SM321B-2, Installation Guide
DDMYes
SFP-MSAYes
Hot SwappableYes
Standards and ProtocolsIEEE 802.3z, TCP/IP
Wave LengthTx: 1310 nm, Rx: 1550 nm
Dimensions (W*D*H)2.2*0.6*0.5 in (55.4*14.6*12.9 mm)
Power Supply3.3V
Safety & EmissionFCC, CE
Fiber Type9/125 _m Single-Mode

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Product form

1000Base-BX WDM Bi-Directional SFP Module

TP_Link

SKU: SM321B-2

17,000 IQD

  • Shipped today? Order within: Jun 17, 2026 17:00:00 +0300
    • Shipped today? Order within: Jun 17, 2026 17:00:00 +0300

    Description

    High-performance WDM Bi-Directional SFP Module for stable gigabit fiber connections.
    The TP-Link TL-SM321B-2 is a high-performance WDM Bi-Directional SFP Module that supports transmission distances of up to 2 km over 9/125 _m Single-Mode Fiber. Developed in accordance with the Small Form Pluggable Multi-Source Agreement (SFP-MSA), this module integrates a Digital Diagnostic Monitoring (DDM) feature compatible with SFF-8472, allowing real-time monitoring of the transceiver's parameters such as temperature, optical power, and current. Ideal for short-to-medium distance fiber networks, it ensures fast and stable gigabit connections for switches, routers, and servers.

    Key Features

    • Adopts the latest standard 1000Base-BX
    • Up to 2 km transmission distance in 9/125 _m SMF
    • Compatible with SFP-MSA
    • Supports Digital Diagnostic Monitoring (DDM)
    • Supports Hot Swappable

    Technical Specifications

    Specification Value
    Package ContentsSFP Module TL-SM321B-2, Installation Guide
    DDMYes
    SFP-MSAYes
    Hot SwappableYes
    Standards and ProtocolsIEEE 802.3z, TCP/IP
    Wave LengthTx: 1310 nm, Rx: 1550 nm
    Dimensions (W*D*H)2.2*0.6*0.5 in (55.4*14.6*12.9 mm)
    Power Supply3.3V
    Safety & EmissionFCC, CE
    Fiber Type9/125 _m Single-Mode

    Read more

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