Arista SFP1G-SX-31-I Compatible 1G SFP Transceiver Module
This Arista SFP1G-SX-31-I compatible transceiver provides 1G connectivity in a hot-swappable SFP package. Its optical design operates at 1310nm for up to 2km, using Duplex LC. Complete parameters and related OEM references help project teams keep OEM references, delivery records and port schedules aligned.
OEM Part Number: SFP1G-SX-31-IHT Part Number: SFP1G-SX-31-I
Product Highlights
- Compatible alternative to Arista SFP1G-SX-31-I
- 1G connectivity at 1.25Gbps
- Optical wavelength: 1310nm
- Specified reach: 2km
- Duplex LC / SMF/MMF interface
- Operating temperature: -40 to 85°C (-40 to 185°F)
- Factory compatibility verification and optical performance testing before shipment
Specifications
| HT Part Number | SFP1G-SX-31-I |
|---|---|
| Manufacturer | HT |
| Form Factor | SFP |
| Max. Data Rate | 1.25Gbps |
| Connector | Duplex LC |
| Max. Cable Distance | 2km |
| Media | SMF/MMF |
| Wavelength | 1310nm |
| Modulation | NRZ |
| Power Consumption | < 1W |
| Transmitter Type | FP |
| Receiver Type | PIN-TIA |
| TX Power | -9~-3dbm |
| Receiver Sensitivity | < -21dBm |
| BER | 1E-12 |
| DOM Support | Yes |
| Protocols | SFF-8472MSAIEEE 802.3 |
| Industrial Temperature Range | -40 to 85°C (-40 to 185°F) |
Project Documentation and Traceability
Large deployments are easier to audit when the order code, optical standard and endpoint record agree. Keep the OEM reference in the compatibility document and the HT part number on the packing list. Labels and carton groups can be arranged by rack or port plan so installers need not identify modules by appearance. For this model, the principal parameters are data rate 1.25Gbps, wavelength 1310nm, rated reach 2km.
Arista Compatibility and Factory Testing
The module is checked for host recognition as SFP1G-SX-31-I, 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.
Applications and Optical Link Design
Typical deployments include switch-to-switch, switch-to-server and aggregation links inside a data hall or between adjacent equipment rooms. The Duplex LC interface connects to the specified multimode cabling, and the stated reach depends on fiber grade and link loss. Keep this interface on the matching multimode optical standard rather than connecting it directly to a single-mode wavelength or reach variant.
The industrial temperature rating makes this version appropriate for controlled outdoor cabinets, transport nodes and other installations exposed to wider ambient temperature variation. Adequate airflow, protected cable routing and host-platform temperature limits still apply.
The multimode channel should use the fiber grade associated with the stated 2km reach. Keep the Duplex LC end faces clean and avoid tight bends. Different multimode standards are not interchangeable merely because they share a connector.
Optical Acceptance, Diagnostics and Handling
For this model, the specified transmit-power range is -9~-3dbm; receiver sensitivity is < -21dBm. 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. 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.
Frequently Asked Questions
Is this an original Arista transceiver?
No. It is an HT-manufactured compatible alternative for equipment that specifies SFP1G-SX-31-I, not an original Arista-branded module.
Which fiber and connector are required?
Use Duplex LC with SMF/MMF. The specified maximum reach is 2km, 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 SFP1G-SX-31-I as the compatibility cross-reference and SFP1G-SX-31-I 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.
Quality Assurance and Packaging
Before packing, the module receives interface inspection, identification and link checks. Protective packaging avoids pressure on the connector and latch. Customer references, rack groups and project packing lists can be added for volume orders.
