Cisco SFP-10/25G-LR-S Compatible 25G SFP28 LR Transceiver Module
Built for hosts recognizing SFP-10/25G-LR-S, this HT-manufactured SFP28 module delivers 25G transmission at 1310nm. Its rated reach is 10km, with Duplex LC/UPC as the physical interface. The specifications and engineering guidance below support field technicians install, maintain and identify the exact compatible module, while keeping HT manufacture separate from the OEM cross-reference.
OEM Part Number: SFP-10/25G-LR-SHT Part Number: SFP-25GMLR-31
Product Highlights
- Compatible alternative to Cisco SFP-10/25G-LR-S
- 25G connectivity at 25.78Gbps
- Optical wavelength: 1310nm
- Specified reach: 10km
- Duplex LC/UPC / SMF interface
- Digital diagnostic monitoring: Supported
- Operating temperature: 0 to 70°C (32 to 158°F)
Specifications
| Cisco Compatible | SFP-10/25G-LR-S |
|---|---|
| Manufacturer | HT |
| HT Part Number | SFP-25GMLR-31 |
| Form Factor | SFP28 |
| Max. Data Rate | 25.78Gbps |
| Wavelength | 1310nm |
| Max. Cable Distance | 10km |
| Connector | Duplex LC/UPC |
| Media | SMF |
| Transmitter Type | DFB |
| Receiver Type | PIN |
| TX Power | -7~2.5dBm |
| Receiver Sensitivity | ＜-12dBm |
| Power Budget | 5dB |
| Receiver Overload | 2.5dBm |
| Max. Power Consumption | ≤ 1.5W |
| Extinction Ratio | ＞3dB |
| DDM/DOM | Supported |
| Commercial Temperature Range | 0 to 70°C (32 to 158°F) |
| Core Size | G.652 |
| Packaging Technology | BOX Packaging |
| Protocols | SFP28 MSA, SFF-8472, SFF-8024, SFF-8431, SFF-8432, CEI-28G-VSR |
Field Installation and Maintenance
Inspect the connector and patch lead before installation, then support the fiber without pulling on the module housing. Release the latch properly during maintenance and keep dust protection on unused interfaces. If a module is removed for later use, retain its part-number label and record its original port. For this model, the principal parameters are data rate 25.78Gbps, wavelength 1310nm, rated reach 10km.
Applications and Optical Link Design
Use this module for equipment interconnection over the specified single-mode fiber plant, including enterprise backbone, campus, metro or data-center interconnect links according to its rated distance. Confirm that both ends use the same optical standard and wavelength plan, and allow for connector, splice and patch-panel loss within the stated power budget.
Before deployment, check the host port type, supported data rate and firmware requirements. The 25G interface configuration must match the remote equipment; sharing a SFP28 housing alone does not make two transceiver types interoperable.
Before commissioning, measure the complete single-mode channel against the stated budget for 10km. Inspect every Duplex LC/UPC connection and record diagnostic power where supported. Both ends must agree on rate, wavelength and optical standard.
Optical Acceptance, Diagnostics and Handling
For this model, the specified transmit-power range is -7~2.5dBm; receiver sensitivity is ＜-12dBm; the stated optical power budget is 5dB. During commissioning, record the host diagnostic readings after the link has stabilized and compare them with those limits. DOM values are useful operational indicators, but they do not replace calibrated optical measurements when a link is marginal. Investigate unexpected loss through connector inspection, cleaning and a channel measurement before replacing the module. Diagnostic monitoring is listed as Supported. Before every insertion, keep dust caps in place until the patch lead is ready, avoid touching the optical end face and use an appropriate inspection and cleaning procedure. Do not look into an active optical interface.
Quality Assurance and Packaging
Quality control covers the optical or electrical interface, host identification and operating link. The verified unit is then individually protected and cartoned. Customer references, rack groups and project packing lists can be added for volume orders.
Cisco Compatibility and Factory Testing
The module is checked for host recognition as SFP-10/25G-LR-S, link establishment and diagnostic reporting. Physical cage fit alone is not treated as evidence of compatibility. Equipment model, hardware revision and software release can be reviewed before dispatch where platform behavior is uncertain.
Frequently Asked Questions
Is this an original Cisco transceiver?
No. It is an HT-manufactured compatible alternative for equipment that specifies SFP-10/25G-LR-S, not an original Cisco-branded module.
Which fiber and connector are required?
Use Duplex LC/UPC with SMF. The specified maximum reach is 10km, subject to fiber quality and total link loss.
Can it be mixed with another wavelength or reach version?
Only when the two ends share the same optical standard, wavelength plan and supported data rate. Check the exact part numbers and link budget rather than relying only on the module form factor.
Ordering Information
Use SFP-10/25G-LR-S as the compatibility cross-reference and SFP-25GMLR-31 as the HT ordering identity. Keep other reaches or wavelength directions on separate order lines. Neutral labels, customer packaging and project-specific compatibility review are available on request.
Shipping and Lead Time
Standard configurations normally ship within one to three working days, with production lead times confirmed for larger quantities. International courier, air freight and sea freight are available; customer courier accounts and nominated forwarders are accepted.
