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Cisco GLC-BX120-U Compatible 1000BASE-BX BiDi SFP 1490nm-TX/1550nm-RX 120km Transceiver Module


The Cisco GLC-BX120-U  compatible SFP optical transceiver module is equipped with an LC simplex connector, reaching a link up to 120km. This 1G BiDi SFP transceiver, featured with carrying information in both directions via a single strand, can double your network capacity and save your cable resources. QSFPTEK manufactured 1G SFP optical transceiver is compliant with MSA, SFF-8472. Besides, DDM (digital diagnostics monitoring) function is supported on the 1G fiber optic transceiver to achieve real-time operating parameters monitoring. It's also fully compatible with almost all OEM brand devices.


Part Number: QT-WDM-02120AD Vendor Name: QSFPTEK
Form Factor: SFP Data Rate: 1.25Gbps
Wavelength: 1490nm-TX/1550nm-RX Distance: 120km
Connector: LC Simplex Cable Type: OS2 SMF
Transmitter: DFB Receiver Type: APD
TX Power: 0~5dBm Receiver Sensitivity: <-30dBm
Power Consumption: <1W Modulation Format: NRZ
DDM: Support Bit Error Ratio (BER): 1E-12
Protocols: Fast Ethernet, Gigabit Fibre Channel, MSA Compliant Warranty: 5 Years
Quality Testing Program
Quality Certifications


  • 1. High Reliablility and Best Price
    Proudly self-producing and rigorous testing, QSFPTEK is dedicated to delivering cost-effective products with high reliability and performance at trade price.
  • 2. Double Your Network Capacity
    One strand is used to carry information in both directions.
  • 3.EMC Support, Anti Electro-Static Discharge and Radiation Resistant.
  • 4. Quality Certifications
    Backed by CE, FCC, ROSH, ISO9001.


Bidirectional (BiDi) SFP module interconnection over a single fiber



Related Product:

LC to LC OS2 Simplex Fiber Optic Patch Cable for Bidirectional Fiber Optic Transceiver

Product details

Save 50% On Fiber Resources


1G BiDi SFP module allows data transmitting and receiving over one single fiber, greatly saving network fiber resources and costs.




Various Switch Tests


Every module is quality tested for compatibility in the multi-brand switches environment, which guarantees flawless operations.


transceiver compatibility tests



Tested in The Host Device to Prove Interoperability


Every unit sold undergoes rigorous quality testing, to ensure compatibility in the target switch environment, guaranteeing perfect operation.




Comprehensive Testing


Every module is qualified through rigorous procedures and advanced equipment to ensure high-quality and reliable optical devices for you.



Questions & Answers

  • I have bought Cisco Compatible 1000BASE-BX-U BiDi SFP Transceiver Modules before, the question is: can I use them for Mikrotik CRS326-24S+2Q+ and Cisco Nexus 3064x switches?
    Yes, Cisco encoding modules can be used normally on Mikrotik and Cisco devices.
  • I have OS2 duplex patch cables, can I connect them to this module?
    Sorry, the bidi modules should be used with single mode simplex patch cords.
  • Could you suggest a fiber patch cable that's suitable for achieving 1000Base transfers?
    You can click on this product: https://www.qsfptek.com/product/101211.html
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