10/100BASE-T SFPArista Networks SFP-1G-LX Compatible 1.25G SFP Transceiver Module 10km on SMF
Built for hosts recognizing SFP-1G-LX, this HT-manufactured SFP module delivers 1.25G transmission at 1310nm. Its rated reach is 10km on SMF, with Duplex LC as the physical interface. The specifications and engineering guidance below support structured fiber installations preserve a documented and serviceable optical channel, while keeping HT manufacture separate from the OEM cross-reference.
OEM Part Number: SFP-1G-LXHT Part Number: SFP1G-LX-31
Product Highlights
- Compatible alternative to Arista Networks SFP-1G-LX
- 1.25G connectivity at 1.25Gbps
- Optical wavelength: 1310nm
- Specified reach: 10km on SMF
- Duplex LC / SMF interface
- Digital diagnostic monitoring: Supported
- Operating temperature: 0 to 70°C (32 to 158°F)
Specifications
| Arista Networks Compatible | SFP-1G-LX |
|---|---|
| Manufacturer | HT |
| HT Part Number | SFP1G-LX-31 |
| Form Factor | SFP |
| Max. Data Rate | 1.25Gbps |
| Wavelength | 1310nm |
| Max. Cable Distance | 10km@SMF |
| Connector | Duplex LC |
| Media | SMF |
| Transmitter Type | FP |
| Receiver Type | PIN |
| DDM/DOM | Supported |
| Commercial Temperature Range | 0 to 70°C (32 to 158°F) |
| TX Power | -9.5~-3dBm |
| Receiver Sensitivity | < -20dBm |
| Power Consumption | ≤1W |
| Receiver Overload | -3dBm |
| Bit Error Ratio (BER) | 1E-12 |
| Extinction Ratio | >9dB |
| EMC (Electro Magnetic Compatibility) | Supported |
| MTBF (LX) | 4,761,904 Hours |
| Protocols | IEEE 802.3ah-2004, IEEE 802.3z, SFF-8472, SFP MSA (INF-8074i) Compliant |
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 1.25G interface configuration must match the remote equipment; sharing a SFP housing alone does not make two transceiver types interoperable.
Before commissioning, measure the complete single-mode channel against the stated budget for 10km on SMF. Inspect every Duplex LC connection and record diagnostic power where supported. Both ends must agree on rate, wavelength and optical standard.
Arista Networks Compatibility and Factory Testing
Factory verification starts with the expected SFP-1G-LX identity and finishes with an operating host link. EEPROM data, diagnostic visibility and the stated optical parameters are assessed together. Equipment model, hardware revision and software release can be reviewed before dispatch where platform behavior is uncertain.
Optical Acceptance, Diagnostics and Handling
For this model, the specified transmit-power range is -9.5~-3dBm; receiver sensitivity is < -20dBm. Digital diagnostics make later maintenance easier when baseline values are captured at installation. Save the initial readings with the port and OEM reference, then investigate meaningful changes rather than reacting to a single transient value. Diagnostic support depends on the host as well as the module, so unavailable fields should be confirmed with the platform documentation. 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.
Structured Fiber Pathways and Serviceability
Treat the transceiver as part of the complete channel. Follow the intended patch-panel route, maintain bend control and leave service access around the port. Confirm connector polish and fiber type at every mated pair; a documented service allowance is preferable to excess slack concealed inside a rack. For this model, the principal parameters are data rate 1.25Gbps, wavelength 1310nm, rated reach 10km on SMF.
Ordering Information
When ordering, specify SFP-1G-LX, SFP1G-LX-31, quantity and intended host platform. Project labels can repeat these details for receiving and asset records. 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.
Quality Assurance and Packaging
Each SFP-1G-LX compatible module is inspected, powered up and functionally checked before protective packing. Dust caps and individual trays shield the interface during transport. Customer references, rack groups and project packing lists can be added for volume orders.
Frequently Asked Questions
Is this an original Arista Networks transceiver?
No. It is an HT-manufactured compatible alternative for equipment that specifies SFP-1G-LX, not an original Arista Networks-branded module.
Which fiber and connector are required?
Use Duplex LC with SMF. The specified maximum reach is 10km on SMF, 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.
