100BASE-BX SFP 2km Transceiver (Side B): BIDI-155M-SFP-2-BD

Our EDGEOPTIC BIDI-155M-SFP-2-BD is a multi-vendor compatible 100BASE-BX bidirectional SFP optical module designed for Fast Ethernet and SDH/SONET STM-1 applications operating over single-mode fiber infrastructure. This BiDi transceiver enables cost-effective fiber utilization by transmitting and receiving on a single fiber strand, making it an ideal solution for legacy access network deployments and premises connectivity where fiber conservation delivers meaningful infrastructure savings while supporting established 100M and 155M protocol standards.

The BIDI-155M-SFP-2-BD module operates at 1550nm wavelength for transmission and 1310nm for reception, supporting data rates from 100 to 155 Mbps. This Side B transceiver must be deployed in matched pairs with its complementary Side A unit (transmitting at 1310nm, receiving at 1550nm) to establish bidirectional communication over a single fiber strand. Our 100BASE-BX SFP transceiver utilizes FP (Fabry-Pérot) laser technology for transmission and PIN photodiode for signal reception – a cost-effective combination well-suited for short-reach access applications. The module ensures a 12 dB guaranteed optical link budget, supporting transmission distances up to 2 kilometers over standard single-mode fiber. However, distance remains an indicative parameter calculated for ease of identification – actual reach depends on minimal optical budget requirements and real-world attenuation characteristics of the installed fiber plant.

The BIDI-155M-SFP-2-BD is a hot-pluggable SFP module featuring a single LC/UPC connector as the optical interface. The electrical interface conforms to INF-8074i and SFP MSA (Multi-Source Agreement) specifications, ensuring compatibility with standard SFP host systems across multiple vendor equipment platforms. Our 100BASE-BX SFP transceiver can be encoded for compatibility with 80+ equipment brands, enabling seamless integration into existing network infrastructure. The module incorporates DDM/DOM (Digital Diagnostic Monitoring) functionality, providing real-time operational parameters including transmitted and received optical power levels, module temperature, laser bias current, and supply voltage. This diagnostic data is accessible via MSA-compatible EEPROM interface, enabling comprehensive monitoring of transceiver health and performance.

The SFP form factor, while considered a legacy standard, remains widely deployed across enterprise, carrier, and industrial networks due to its proven reliability, broad equipment support, and cost-effectiveness for sub-Gigabit applications. The 155M data rate continues to serve important roles in telecommunications infrastructure, supporting SDH/SONET STM-1 transport and 100M Ethernet access applications where higher bandwidth is not required. The module operates within a standard 0°C to 70°C commercial temperature range, with appropriate thermal considerations for sustained operation in controlled equipment room environments. Power requirements are met by a single +3.3V supply.

Standards compliance includes IEEE 802.3ah for 100BASE-BX Fast Ethernet along with SDH/SONET STM-1 (155Mbps) support. The transceiver achieves multi-vendor interoperability through adherence to industry MSA standards, though equipment with vendor-specific module validation may require custom EEPROM programming for full compatibility. Our 100BASE-BX SFP transceiver is CE and RoHS certified, meeting Class 1 FDA and IEC60825-1 laser safety requirements.

Typical applications include telecommunications access networks, legacy enterprise Fast Ethernet connectivity, SDH/SONET STM-1 transport systems, and short-reach carrier access infrastructure where single-fiber operation reduces cabling requirements. Because our focus is providing top quality service, we perform rigorous quality checks before delivery. This includes optical parameter measurements, connector cleanliness inspection, and SFP transceiver EEPROM memory data validation tests.