25G SFP28 40km RX-Only Transceiver Module: 25G-SFP28-40RX

Our EDGEOPTIC 25G-SFP28-40RX is a multi-vendor compatible 25G SFP28 receive-only optical module designed for specialized long-haul monitoring and unidirectional receiving applications in 25 Gigabit Ethernet networks. The 25G-SFP28-40RX module operates as a receiver-only device at 1310nm wavelength, with data rates from 8.5 to 28.1 Gbps supporting multiple protocol standards and applications. Our 25G SFP28 RX-only transceiver utilizes APD (Avalanche Photodiode) technology for receiving, providing superior sensitivity for optical signal detection in extended-reach network monitoring, passive optical tapping, and specialized diagnostic applications.

The transceiver features exceptional receiver sensitivity of -19 dBm, optimized for detecting optical signals transmitted up to 40 kilometers over single-mode fiber. The receiver wavelength bandwidth of 30nm spanning 1295-1325nm provides precise wavelength selectivity centered around 1310nm, making it suitable for long-haul signal monitoring applications. However, distance is just an indicative parameter calculated for convenience of identification – eventually we calculate distance taking into account receiver sensitivity and average attenuation of optical cabling in industry standards. The APD-based receive-only architecture eliminates transmit functionality while maximizing detection sensitivity, making this module ideal for passive monitoring scenarios in metropolitan and regional networks.

25G-SFP28-40RX compatible RX-only module is hot-pluggable SFP28 with single LC/UPC connector as an optical interface, simplifying deployment in extended-reach monitoring and diagnostic configurations. The electrical interface conforms to SFF-8402, SFF-8431, SFF-8432, and SFF-8472 MSA (Multi-Source Agreement) specifications, ensuring compatibility with standard SFP+ and SFP28 host systems supporting multiple vendor equipment platforms. Our 25G SFP28 RX-only 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 received optical power levels, module temperature, and supply voltage. This diagnostic data is available via MSA-compatible EEPROM interface, enabling continuous monitoring of APD receiver performance parameters critical for long-haul applications.

The module operates within a 0 to 70°C temperature range with maximum power consumption of 1W, optimized for deployment in controlled environment data centers and telecom facilities. The APD photodiode receiver provides exceptional sensitivity of -19 dBm, crucial for detecting weak signals after 40km transmission, with receiver overload protection at -7 dBm preventing damage from excessive optical power. The absence of FEC support indicates this module is designed for raw signal monitoring applications where error correction is handled elsewhere in the network. The specialized wavelength bandwidth ensures optimal performance for 1310nm long-haul monitoring while rejecting adjacent wavelengths. The transceiver achieves multi-vendor interoperability through adherence to SFP+ MSA standards, though equipment with vendor-specific module validation may require custom EEPROM programming for compatibility.

Our 25G SFP28 40km RX-only transceiver is CE/RoHS certified and compliant with Class 1 FDA and IEC60825-1 laser safety standards. Typical applications include metropolitan optical network monitoring systems, long-haul passive optical TAP deployments, regional network diagnostic and troubleshooting setups, extended-reach optical power measurement stations, and specialized test equipment for carrier networks. The combination of APD technology and receive-only functionality makes it particularly valuable for monitoring weak signals in long-distance links without introducing any optical interference. The multi-rate capability accommodates both 10 Gigabit Ethernet (10.31 Gbps) and 25 Gigabit Ethernet (25.78 Gbps) signal detection, providing operational flexibility for mixed-speed network monitoring across metropolitan distances. Because our focus is providing top quality service, we perform rigorous quality checks before delivery including APD sensitivity measurements, wavelength response testing, connector cleanliness tests, and SFP28 transceiver EEPROM memory data validation tests, ensuring optimal detection performance for 40km monitoring applications.