1000BASE-EX SFP 20km Transceiver: 1.25G-SFP-20D

Our EDGEOPTIC 1.25G-SFP-20D is a multi-vendor compatible 1000BASE-EX SFP dual-fiber optical module designed for Gigabit Ethernet applications operating over single-mode fiber cabling. The 1.25G-SFP-20D module operates at 1310nm wavelength for transmission and reception, with data rates from 1.063 to 1.25 Gbps and supports multiple protocol standards and applications. Our 1000BASE-EX SFP transceiver utilizes FP (Fabry-Perot) laser for transmission and PIN photodiode for receiving. Transceiver ensures a 15 dB guaranteed optical link budget, which determines the maximum transmission distance. Over single-mode fiber, the transceiver can reach distances up to 20 kilometers, providing extended reach for metropolitan and regional network deployments. However, distance is just an indicative parameter calculated for comfort of identification – eventually we calculate distance taking into account minimal optical budget and average attenuation of optical cabling in industry.

1.25G-SFP-20D compatible 1000BASE-EX module is hot-pluggable SFP with duplex LC/UPC connectors as an optical interface. The electrical interface conforms to INF-8074i MSA (Multi-Source Agreement) specifications, ensuring compatibility with standard SFP host systems supporting multiple vendor equipment platforms. Our 1000BASE-EX SFP transceiver can be encoded to be compatible and successfully operate in different 80+ brands of equipment. The module incorporates 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 and enables monitoring of transceiver operational parameters. The module operates within a 0 to 70°C temperature range, with appropriate thermal considerations for sustained operation in controlled network environments.

Standards compliance includes IEEE 802.3z for Gigabit Ethernet, along with support for 1G Fiber Channel applications 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 compatibility. Our 1000BASE-EX SFP transceiver is CE/RoHS certified, and it is compliant with Class 1 FDA and IEC60825-1 laser safety standards.

Typical applications are metropolitan area networks, service provider access rings, campus backbone extensions, and enterprise WAN connections. The 20km reach capability bridges the gap between standard 10km modules and long-haul 40km solutions, offering cost-effective extended reach for medium-distance applications. The module's wavelength bandwidth of 100nm (1260-1360nm) ensures stable operation across varying environmental conditions and component aging. Because our focus is providing top quality service, we are performing serious quality checks before delivery of our products. As a result, we do optical parameter measurements, connector cleanness tests and SFP transceiver EEPROM memory data validation tests.