10/100BASE-T SFPExtreme QSFP-LR4-40G-I Compatible 40G QSFP+ LR4 Transceiver Module
Built for hosts recognizing QSFP-LR4-40G-I, this HT-manufactured QSFP+ module delivers 40G transmission at 1310nm. Its rated reach is 10km, 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: QSFP-LR4-40G-IHT Part Number: QSFP-LR4-40G-I
Product Highlights
- Compatible alternative to Extreme QSFP-LR4-40G-I
- 40G connectivity at 41.25Gbps (4x 10.3125Gbps)
- Optical wavelength: 1310nm
- Specified reach: 10km
- Duplex LC / SMF interface
- Operating temperature: -40 to 85°C (-40 to 185°F)
- Factory compatibility verification and optical performance testing before shipment
Specifications
| HT Part Number | QSFP-LR4-40G-I |
|---|---|
| Manufacturer | HT |
| Form Factor | QSFP+ |
| Max. Data Rate | 41.25Gbps (4x 10.3125Gbps) |
| Wavelength | 1310nm |
| Max. Transmission Distance | 10km |
| Connector | Duplex LC |
| Media | SMF |
| Transimitter Type | DFB CWDM |
| Receiver Type | PIN |
| TX Power | -7~2.3dBm |
| Receiver Sensitivity | <-11.5dBm |
| Power Budget | 4.5dB |
| Receiver Overload | 2.3dBm |
| Max. Power Consumption | ≤2.5W |
| Extinction Ratio | >3.5dB |
| Host FEC | Supported |
| Bit Error Ratio (BER) | 1E-12 |
| Operating Temperature | -40 to 85°C (-40 to 185°F) |
| Protocols | QSFP+ MSA, SFF-8436, IEEE 802.3ba |
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.
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.
Before commissioning, measure the complete single-mode channel against the stated budget for 10km. Inspect every Duplex LC connection and record diagnostic power where supported. Both ends must agree on rate, wavelength and optical standard.
Extreme Compatibility and Factory Testing
Compatibility testing for QSFP-LR4-40G-I 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.
Optical Acceptance, Diagnostics and Handling
For this model, the specified transmit-power range is -7~2.3dBm; receiver sensitivity is <-11.5dBm; the stated optical power budget is 4.5dB. 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. 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 41.25Gbps (4x 10.3125Gbps), wavelength 1310nm, rated reach 10km.
Ordering Information
When ordering, specify QSFP-LR4-40G-I, QSFP-LR4-40G-I, 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 QSFP-LR4-40G-I 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 Extreme transceiver?
No. It is an HT-manufactured compatible alternative for equipment that specifies QSFP-LR4-40G-I, not an original Extreme-branded module.
Which fiber and connector are required?
Use Duplex LC 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.
