25G BiDi SFP28 20km Industrial Transceiver (Side B): BIDI-25G-SFP28-20BI

Our EDGEOPTIC BIDI-25G-SFP28-20BI is a multi-vendor compatible industrial-grade 25G BiDi SFP28 single-fiber optical module designed for extended-reach 25 Gigabit Ethernet applications in harsh environmental conditions. The BIDI-25G-SFP28-20BI module transmits at 1330nm wavelength and receives at 1270nm wavelength, with data rates from 8.5 to 28.1 Gbps supporting multiple protocol standards and applications. Our industrial 25G BiDi SFP28 20km transceiver utilizes DML (Directly Modulated Laser) technology for transmission and PIN photodiode for receiving, serving as the complementary unit for bidirectional communication when paired with the BIDI-25G-SFP28-20AI module in extreme temperature environments.

The transceiver ensures a 7 dB guaranteed optical link budget with host-based Forward Error Correction (FEC) support, which determines the maximum transmission distance capabilities. Over standard single-mode fiber (SMF), the module achieves reliable bidirectional transmission up to 20 kilometers, making it ideal for outdoor metropolitan deployments, industrial campus extensions, and critical infrastructure networks where both fiber conservation and environmental resilience are essential. However, distance is just an indicative parameter calculated for convenience of identification – eventually we calculate distance taking into account minimal optical budget and average attenuation of optical cabling in industry standards. The robust BiDi architecture maintains consistent 20km reach across extreme temperature variations, requiring proper pairing with the BIDI-25G-SFP28-20AI module to establish bidirectional communication.

BIDI-25G-SFP28-20BI compatible industrial extended-reach BiDi module is hot-pluggable SFP28 with single LC/UPC connector as an optical interface, reducing fiber infrastructure requirements by 50% while meeting stringent industrial reliability standards. The electrical interface conforms to SFF-8431 and SFF-8432 MSA (Multi-Source Agreement) specifications, ensuring compatibility with standard SFP28 host systems supporting multiple vendor equipment platforms. Our industrial 25G BiDi SFP28 20km transceiver can be encoded to be compatible and successfully operate in different 80+ brands of equipment. The module incorporates comprehensive DDM/DOM (Digital Diagnostic Monitoring) functionality providing real-time information including transmitted and received optical power levels, module temperature, bias current, and supply voltage. This diagnostic data is available via MSA-compatible EEPROM interface per SFF-8472 specifications, enabling continuous monitoring of both wavelength channels across extended distances in extreme conditions.

The module operates within an extended industrial temperature range of -45°C to +85°C, with maximum power consumption of 1.2W, specifically designed for deployment in uncontrolled environments including outdoor cabinets, remote cell sites, utility infrastructure, and transportation networks. The enhanced thermal design ensures stable DML laser operation at 1330nm with output power from -4 to 4 dBm and maintains the 3.5 dB minimum extinction ratio across the entire temperature spectrum while preserving 20km reach capability. The PIN photodiode receiver maintains sensitivity of -11 dBm at 1270nm even at temperature extremes, with 20nm receiver wavelength bandwidth ensuring proper channel isolation between transmit and receive paths. Standards compliance includes CPRI Option 10/eCPRI specifications for wireless fronthaul applications, supporting both 10G Ethernet (10.31 Gbps) and 25G Ethernet (25.78 Gbps) applications.

Our industrial 25G BiDi SFP28 20km transceiver is CE/RoHS certified and compliant with Class 1 FDA and IEC60825-1 laser safety standards. Typical applications include outdoor 5G fronthaul deployments utilizing CPRI/eCPRI capabilities, smart grid communications, railway signaling systems, mining operations, and oil and gas facilities where fiber scarcity and extended reach requirements converge with harsh environmental challenges. The combination of BiDi technology, extended reach, and industrial hardening makes it ideal for metropolitan-scale deployments in extreme conditions. The multi-rate capability accommodates legacy 10 Gigabit Ethernet operation alongside native 25 Gigabit rates, providing operational flexibility for mixed-speed network deployments. Because our focus is providing top quality service, we perform extensive environmental testing including thermal cycling, vibration resistance, humidity exposure tests, wavelength stability verification, in addition to optical parameter measurements, connector cleanliness tests, and SFP28 transceiver EEPROM memory data validation tests, ensuring reliable 20km bidirectional operation in matched pairs.