Cisco SFP-10/25G-LR-S Compatible Dual-Rate 10/25GBASE-LR SFP28

EdgeOptic's SFP-10/25G-LR-S compatible is a Cisco-coded dual-rate 10G/25G LR SFP28 transceiver and the Cisco-coded variant of the EdgeOptic 25G-SFP28-10 multi-vendor 25GBASE-LR catalog. The optic carries 10 Gigabit Ethernet (10.31 Gbps) and 25 Gigabit Ethernet (25.78 Gbps) over a single G.652 SMF pair at 1310 nm, terminated with a duplex LC/UPC connector. The same module serves both rates, which lets a host port migrate from 10GBASE-LR to 25GBASE-LR without changing the optic on the span.

The transmitter is a DML driving the 1310 nm LC duplex; the receiver is a PIN photodiode. Optical specifications: TX output power −7 to +2 dBm, RX sensitivity −12 dBm, RX overload +3 dBm, minimum extinction ratio 3.5 dB, and a 5 dB optical link budget across the 10 km specified reach over G.652 SMF. Real reach on a long link depends on installed fiber attenuation, splice and connector loss, and the host's link margin policy, so on spans above 8 km calculate end-to-end insertion loss against the 5 dB budget rather than the nominal 10 km figure. The module operates 0 to 70 °C on a +3.3 V single supply with 1.2 W maximum power consumption.

At 25G operation the host MAC performs RS(528,514) RS-FEC; the module itself has no built-in FEC. Cisco platforms differ in how they treat this: some auto-enable RS-FEC when a 25GBASE-LR optic is detected, others require explicit per-interface FEC configuration. FEC mismatch between the two ends of a 25G link causes link-down events that do not surface as optical errors, so confirm the FEC mode on both ends before commissioning. At 10G operation the optic behaves as a standard 10GBASE-LR module and host-side FEC is not required, but the host port must support dual-rate selection between 10G and 25G on its SFP28 cage. DDM diagnostics report TX power, RX power, module temperature, laser bias, and supply voltage in real time per SFF-8472.

The module ships with Cisco-recognized EEPROM coding so the optic registers cleanly on Cisco hosts on its vendor identity and does not require third-party-transceiver override commands. The SFP-10/25G-LR-S is also orderable from Cisco as SFP-10/25G-LR-S= (the spare-part PID variant); both PIDs map to the same optical module. Platform support spans Cisco Catalyst, Nexus, NCS, and UCS lines that have 25G SFP28 cages with dual-rate support; verify the specific chassis and line card against Cisco's Transceiver Module Group compatibility matrix at tmgmatrix.cisco.com before ordering. Typical applications: campus and data center 25G aggregation, metro long-reach uplinks, and phased 10G-to-25G migrations using a single part number across both deployment generations. Conforms to IEEE 802.3cc, SFF-8431, SFF-8432, SFF-8472, and the SFP28 MSA.

Compliance: CE, Class 1 FDA and IEC 60825-1 laser safety, RoHS. Ships next business day from EU stock with a lifetime warranty. Backed by 15+ years of EdgeOptic compatibility engineering across vendor optical platforms. For volume pricing, custom EEPROM coding, or compatibility verification on a specific Cisco chassis, contact our sales team.