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SEESUO’s Standard SFP is a series of optical transceiver modules operating at 850nm, 1310nm, 1550nm wavelengths over dual fibers. They are designed for use in Fast Ethernet, Gigabit Ethernet, Fibre Channel, and SONET/SDH links, compliant with the SFP MSA. SEESUO supplies OEM service and Third-Party(Cisco, Juniper, HP, Dell, MikroTik etc.) compatible fiber optic transceivers.

1.25G BiDi SFP Transceiver Module for Gigabit Ethernet and 1G Fibre Channel (SMF, 1550nm-TX/1310nm-RX, 20km, LC, DDM)

Optcore’s OPB1250-5320DCR is a hot-pluggable SFP bi-directional (BiDi) transceiver module specifically for duplex optical data communications such as 1000BASE-BX20 Gigabit Ethernet per IEEE802.3z and 1G Fibre Channel application. This 1G BiDi SFP module provides 20km transmission distance over a single strand of single-mode fiber. Compared with commonly used dual fiber SFP modules, this BiDi SFP transceiver allows end users to reduce the total cost on fiber cabling infrastructure by requiring half of the fiber cables, providing increased transmission capacity very convenient without installing new fibers.

The transmitter section uses a 1550nm DFB laser that is a class 1 laser compliant according to International Safety Standard IEC 60825. The receiver section uses a high-speed 1310nm InGaAs PIN photodiode (PD) integrated with a trans-impedance preamplifier (TIA). The BiDi SFP module is fully compliant with the SFP Multi-Sourcing Agreement (MSA) and SFF-8472. For further information, please see SFP MSA and SFF-8472 standard.

An OPB1250-5320DCR is always connected with an OPB1250-3520DCRover a single fiber.



• Hot-Pluggable SFP package
• Up to 1.25Gb/s data links
• Compliant with SFP MSA standard
• Compliant with IEEE 802.3z
• Single LC Connector
• Single 3.3V power supply
• Low power dissipation
• The metal enclosure provides lower EMI
• ROHS compliant and Lead-Free
• Digital Diagnostic Monitor Interface


● Fast Ethernet

● Gigabit Ethernet

● 1X Fibre Channel






What is compatible with 1.25 g SFP?

1.25G-SFP-10D SFP is fully compliant to SFP Multi Source Agreement INF-8074i. Consequently, it means that module is compatible with 80% of networking equipment, where is not implemented a special algorithm for protection against third party modules.

What is 1.25 g SFP?

1.25G-SFP-550D is Multi-Vendor MSA Compatible Multimode 1000Base-SX SFP (Small Form factor Pluggable) Transceiver, operating over Double Fiber Multi-Mode Fiber (MMF) optical cable. It has minimum guaranteed optical budget of 7.5 dB, with in most cases is enough to reach about 550 m 1000base-SX distance.

Company Overview:

Shenzhen seesuo technology co., ltd., is one of the high-tech companies, who is specialized in developing, manufacturing, selling and serving telecommunication-level products.

We offer a wide range of the products, such as Fiber Optic Splice Closure, Fiber Optic Termination Box, rack mounting ODF, wall mounting ODF, optical cross cabinet as well as passive components, such as patch cord, pigtail, optical splitter etc.

With the continuing rapid development of Internet, new Internet service which continuously increase needs of bandwidth of Internet access, our company FTTX solutions adopt independent R&D Optical Link Service products. We have taken full consideration of requirement in different operating environment by offering a range so f OLT, ONU, etc. GEPON products for customers various needs. Our FTTX products also include FTTX FOSC with splitter mounted, FTTX box, MDU splitter terminal, EPON/GEPON broadband data integration cabinet.

Our company have consistent quality, and our QC team monitor the manufacturing process and inspect all the products before shipment. At the same time, we are looking for global partners overseas. If you are an end user, distributor or agent of telecommunication-level products, please contact us.

We look forward to working with you in the near future.

"Integrity, Professionalism, Quality and Innovation" is our eternal goal. We are confident that we will be your reliable partner in China and Look forward to establishing fruitful business relationship with the customers domestic and overseas.

The SFP transceivers are high-performance, cost-effective modules supporting dual data-rate of 1.25Gbps/1.0625Gbps. The transceiver consists of three sections: a laser transmitter, a photodiode integrated with a trans-impedance preamplifier (TIA) and MCU control unit. All modules satisfy class I laser safety requirements. The transceivers are compatible with SFP Multi-Source Agreement (MSA) and SFF-8472. For further information, please refer to SFP MSA. If you need a large quantity of 1.25G BiDi SFP transceiver module product - Mail us through our E-mail at sales@seesuo.com or request a quote at live chat and our sales manager will contact you shortly.
Product Model Rate Wavelength Distance Connector Cable Type DDM
SS-SFP1G-XX35-L 1.25G 1310T/1550R 10km,20km,40km LC SMF With DDM
SS-SFP1G-XX53-L 1.25G 1550T/1310R 10km,20km,40km LC SMF With DDM
SS-SFP1G-XX34-L 1.25G 1310T/1490R 10km,20km,40km LC SMF With DDM
SS-SFP1G-XX43-L 1.25G 1490T/1310R 10km,20km,40km LC SMF With DDM
SS-SFP1G-XX45-L 1.25G 1490T/1550R 80km,120km LC SMF With DDM
SS-SFP1G-XX54-L 1.25G 1550T/1490R 80km,120km LC SMF With DDM
  • Dual data-rate of 1.25Gbps/1.063Gbps operation
  • 1310nm FP laser transmitter and 1550nm PIN photo-detector for 10/20km transmission
    1310nm DFP laser transmitter and 1550nm PIN photo-detector for 40km transmission
    1550nm DFB laser transmitter and 1310nm PIN photo detector for10/20/40km transmission
    1490nm DFB laser transmitter and 1550nm APD photo detector for 80km/120km transmission
    1550nm DFB laser transmitter and 1490nm APD photo detector for 80km/120km transmission
  • Compliant with SFP MSA and SFF-8472
  • Hot-Pluggable
  • Digital Diagnostic Monitoring
  • Compatible with SONET OC-24-LR-1
  • Compatible with RoHS
  • +3.3V single power supply
  • Operating case temperature: Standard:  0 to +70°C
  • Gigabit Ethernet
  • Fiber Channel
  • Metro/Access Networks
  • Switched backplane applications
  • Router/Server interface
  • Other optical transmission systems
  • 10 pcs Transceivers pack with one plastic box.
  • 4 plastic boxes pack with one antistatic bag.
  • OEM Manufacturer
    SEESUO supports OEM manufacturing by producing products according to the designs and specifications provided by the client. We strictly adhere to commercial confidentiality principles to protect the client's brand and privacy.
  • ODM Manufacturer
    SEESUO has extensive research and development experience and high-quality production management capabilities. We can develop and manufacture products specifically for our clients' brands according to their needs.
  • Customized production
    SEESUO offers highly customized product research and development and manufacturing services with a flexible production model. We are able to meet the small-batch customized production needs of some high-end clients.
  • R&D cooperation
    SEESUO is capable of adapting to the rapidly changing market demands and can collaborate with customers in research and development. We invest resources in R&D to meet customers' specialized requirements and build a strong brand moat.
  • function testing
  • compatibility testing
  • industrial production line
  • adaptive testing
  • data rate testing
  • final inspection
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