Juniper Networks EX-SFP-1GE-SX-ET Compatible 1G SFP Transceiver Module
The EX-SFP-1GE-SX-ET compatible module serves equipment requiring a 1G SFP interface with 850nm optics and a 550m over OM2 MMF rating. Connection is through Duplex LC. Product data, application guidance and factory verification are presented together to support procurement teams match an equipment parts list to a clearly defined optical product.
OEM Part Number: EX-SFP-1GE-SX-ETHT Part Number: SFP1G-SX-85-I
Product Highlights
- Compatible alternative to Juniper Networks EX-SFP-1GE-SX-ET
- 1G connectivity at 1.25Gbps
- Optical wavelength: 850nm
- Specified reach: 550m over OM2 MMF
- Duplex LC / MMF interface
- Operating temperature: -40 to 85°C (-40 to 185°F)
- Factory compatibility verification and optical performance testing before shipment
Specifications
| Juniper Networks Compatible | EX-SFP-1GE-SX-ET |
|---|---|
| Manufacturer | HT |
| HT Part Number | SFP1G-SX-85-I |
| Form Factor | SFP |
| Max. Data Rate | 1.25Gbps |
| Wavelength | 850nm |
| Max. Cable Distance | 550m over OM2 MMF |
| Connector | Duplex LC |
| Optical Components | VCSEL 850nm |
| Media | MMF |
| DOM Support | Yes |
| TX Power | -9.5~-3dBm |
| Receiver Sensitivity | < -17dBm |
| Industrial Temperature Range | -40 to 85°C (-40 to 185°F) |
| Protocols | IEEE 802.3z, SFF-8472, FC-PI, SFP MSA (INF-8074i) Compliant |
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.
For this multimode module, confirm fiber grade, modal bandwidth and total loss before commissioning. The 550m over OM2 MMF figure applies only under suitable cabling conditions. Inspect every Duplex LC mating point and match the remote optical standard.
Optical Acceptance, Diagnostics and Handling
For this model, the specified transmit-power range is -9.5~-3dBm; receiver sensitivity is < -17dBm. A sound acceptance record includes link state, diagnostic temperature, supply voltage and transmit or receive levels where the host exposes them. Compare the readings with the stated ranges rather than treating any received light as proof of adequate margin. Persistent alarms or borderline values should trigger an end-face and complete-channel inspection. 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.
Procurement and Asset Identification
A useful purchase order identifies the host platform, expected OEM code and optical standard separately. This prevents a module with the same housing but another wavelength, reach or identification profile from being substituted. For mixed deployments, keep one order line per OEM reference and reconcile each received unit with its intended port. For this model, the principal parameters are data rate 1.25Gbps, wavelength 850nm, rated reach 550m over OM2 MMF.
Juniper Networks Compatibility and Factory Testing
Compatibility testing for EX-SFP-1GE-SX-ET combines identification with a live link and available transmit, receive and alarm information. Connector condition is inspected separately. Equipment model, hardware revision and software release can be reviewed before dispatch where platform behavior is uncertain.
Ordering Information
Use EX-SFP-1GE-SX-ET as the compatibility cross-reference and SFP1G-SX-85-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.
Quality Assurance and Packaging
Each EX-SFP-1GE-SX-ET 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 Juniper Networks transceiver?
No. It is an HT-manufactured compatible alternative for equipment that specifies EX-SFP-1GE-SX-ET, not an original Juniper Networks-branded module.
Which fiber and connector are required?
Use Duplex LC with MMF. The specified maximum reach is 550m over OM2 MMF, 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.
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.