1000BASE-BX SFP 20km SC Transceiver (1310/1490nm) (Side A): BIDI-1.25G-SFP-21-ADS

Our EDGEOPTIC BIDI-1.25G-SFP-21-ADS is a multi-vendor compatible 1000BASE-BX bidirectional SFP optical module designed for medium-reach Gigabit Ethernet 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 particularly suitable for metropolitan access networks and extended campus deployments where fiber conservation delivers meaningful infrastructure savings. The SC connector variant provides seamless integration with legacy fiber infrastructure where SC patch panels and cabling remain in service.

The BIDI-1.25G-SFP-21-ADS module operates at 1310nm wavelength for transmission and 1490nm for reception, supporting data rates from 1.063 to 1.25 Gbps. This Side A transceiver must be deployed in matched pairs with its complementary Side B unit (transmitting at 1490nm, receiving at 1310nm) to establish bidirectional communication over a single fiber strand. The 1310/1490nm wavelength pairing offers an alternative to the standard 1310/1550nm combination, providing flexibility for network designs where wavelength planning considerations favor the 1490nm band. Our 1000BASE-BX SFP transceiver utilizes FP (Fabry-Pérot) laser technology for transmission and PIN photodiode for signal reception. The module ensures a 13 dB guaranteed optical link budget, supporting transmission distances up to 20 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-1.25G-SFP-21-ADS is a hot-pluggable SFP module featuring a single SC/UPC connector as the optical interface. The SC connector format offers robust push-pull engagement and remains prevalent in telecommunications environments, central office installations, and enterprise networks where existing infrastructure predates widespread LC adoption. 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 1000BASE-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 Gigabit applications. 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 1000BASE-BX Gigabit Ethernet along with 1G Fiber Channel support at 1.0625 Gbps. 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 1000BASE-BX SFP transceiver is CE and RoHS certified, meeting Class 1 FDA and IEC60825-1 laser safety requirements.

Typical applications include telecommunications central offices, legacy metropolitan access networks, multi-building campus connectivity, and carrier access infrastructure requiring SC connector compatibility for integration with existing fiber plant. 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.