Condition: Used

The Oplink QSFP-4X28G-LR4 is a used 100G QSFP28 form-factor optical transceiver supporting 100GBASE-LR4 applications. The module delivers 100Gbps transmission across four LAN-WDM lanes over single-mode fibre at up to 10km reach via a duplex LC connector.

Typically includes:
• QSFP-4X28G-LR4 transceiver module

The Oplink QSFP-4X28G-LR4 is a 100Gbps hot-pluggable fibre optic transceiver in the QSFP28 MSA form factor, designed for 100GBASE-LR4 Ethernet and client-side 100G telecom applications. The module transmits 100Gbps aggregate data across four LAN-WDM optical lanes, each operating at 25.78125Gbps, and multiplexes them into a single channel over standard single-mode fibre. On the receive side, an integrated optical demultiplexer separates the four wavelength channels, each recovered by a PIN photodetector and transimpedance amplifier. Digital monitoring and control functions are accessible via an I2C serial interface compliant with MSA SFF-8636. Low power consumption and excellent EMI performance enable high port density system designs.

Form Factor: QSFP28 (MSA compliant)
Data Rate: 100Gbps aggregate (4x25.78125Gbps per lane)
Standard Compliance: IEEE 802.3ba 100GBASE-LR4
Electrical Interface: 4x28G CEI-28G-VSR
Fibre Type: G.652 Single-Mode Fibre (SMF)
Maximum Reach: 10km
Optical Connector: Duplex LC receptacle
Transmitter: Cooled 4x25Gb/s LAN-WDM EML TOSA
TX Wavelengths: 1295.56nm, 1300.05nm, 1304.58nm, 1309.14nm
Receiver: 4x25Gb/s PIN ROSA
Power Supply: Single +3.3V
Max Power Consumption: 4.0W
Operating Case Temperature: 0°C to +70°C
Storage Temperature: -40°C to +85°C
Digital Diagnostics: Yes — via I2C (SFF-8636 MSA)
Communication Interface: I2C 2-wire serial
Hot-Pluggable: Yes
Laser Safety: Class 1 per IEC 60825 and US FDA/CDRH
RoHS Compliance: RoHS-6 compliant

Applications:
100GBASE-LR4 Ethernet links
Client-side 100G telecom connections
Data centre interconnect (DCI)
High-performance computing networks
Enterprise core and distribution layer networks
Campus and metro network infrastructure

Oplink QSFP28 LR4 product page — official manufacturer product listing: Download PDF

100GBASE-LR4 QSFP28 LR4 SMF Transceiver Data Sheet (Approved Networks reference datasheet for QSFP28-LR4): Download PDF

Shipping & Returns Policy

Shipping Policy

• Processing Time: Orders are typically processed and dispatched within 1 business day.
• Shipping Methods: We offer Expedited Shipping to all destinations using UPS/DHL/Fedex/Royal Mail and other reputable carriers.
• Shipping Times: Mainland UK: 1-2 Business Days / Mainland Europe and USA: 2-3 Business Days / Rest of the World 5-7 Business Days.
• Shipping Costs: These are calculated at checkout based on the shipping method, destination and package dimensions.
• CUSTOMS AND TAXES: It is YOUR responsibility to liaise with customs in your country and ensure your package is cleared and any taxes are paid.
• Shipping Destinations: We ship worldwide.
• Tracking: Once your order is shipped, we will provide you with a tracking number via email.
• Insurance: All shipments are insured. In case of damage, please contact us via email within 48 hours of receiving the product with photographic evidence, please also ensure a report is logged with the delivery driver.

Returns Policy

• Return Period: In the event of an item being received which is 'not as specified', you can return your purchase within 14 days of delivery.
• Condition of Items: Items must be returned unused and in their original packaging.
• Return Method: All returns must be notified in writing to hello@ttinstruments.com, the email should accompany the order number, date and reason for return and must be within 14 days of delivery.
• Restocking Fees: A restocking fee of up-to 20% is applicable for items returned for any reason other than 'not as specified'.
• Refund Method: Refunds are processed to the original method of payment within 5 business days of receiving the return.
• Exchanges: We do not offer exchanges. It will either be a replacement or a refund.
• Return Shipping Costs: Return shipping costs will be borne by the customer unless the item is 'not as specified', in this case we will arrange for the return by way of a prepaid shipping label.