100G QSFP28 ER4L 4x 25G NRZ QSFP-100G-ER4L-S 1310nm 40km Duplex LC/UPC Module, Cisco

The 100G QSFP28 ER4L 4x 25G NRZ QSFP-100G-ER4L-S 1310nm 40km Duplex LC/UPC Module, Cisco is a hot-pluggable QSFP28 transceiver rated at 103.125Gbps (4x 25.78Gbps). Using a Duplex LC/UPC optical interface over SMF at 1310nm, it covers transmission distances up to 40km. Compliance with QSFP28 MSA, SFF-8636, IEEE 802.3bm, CAUI-4, together with integrated diagnostic monitoring, makes it a dependable choice for 100G Ethernet, data center interconnect and 5G transport networks.

Product Highlights

• QSFP28 form factor, 103.125Gbps (4x 25.78Gbps) data rate
• Wavelength: 1310nm
• Connector: Duplex LC/UPC
• Reach: up to 40km
• Fiber media: SMF
• DDM/DOM: Supported

In 100G Ethernet, data center interconnect and 5G transport networks, the 100G QSFP28 ER4L 4x 25G NRZ QSFP-100G-ER4L-S 1310nm 40km Duplex LC/UPC Module, Cisco delivers 103.125Gbps (4x 25.78Gbps) transmission over SMF with a reach of 40km. With its Duplex LC/UPC optical interface, the module works directly with the SMF infrastructure already installed in most facilities. Compatibility with Cisco systems is verified in our own test lab before shipment, so the unit works out of the box as an equivalent of QSFP-100G-ER4L-S. The link runs 4x 25G-NRZ modulation, which keeps it aligned with current 100G switch silicon.

Compliance: QSFP28 MSA, SFF-8636, IEEE 802.3bm, CAUI-4. For projects standardized on Cisco hardware, this product replaces the QSFP-100G-ER4L-S directly, with identical fit and function. Every unit's EEPROM coding and link behavior are verified on real host equipment in our lab, so what arrives at your site is ready to use.

Order this product as QSFP-ER4L-100G. Common models are stocked for fast dispatch. We can supply the module with neutral or customer-branded labels, and compatibility coding for a specific equipment vendor can be added at no extra process step.

Each unit is sealed in an anti-static bag, cushioned in a blister tray and boxed in an export-grade carton. Outer cartons carry handling marks and can be palletized for air or sea freight. If your project requires retail boxes, barcodes or your own brand on the label, we can arrange that as well.

Our product line has grown with the industry for three decades, from GBIC-era modules to today's 800G and 1.6T interconnects. If the exact configuration you need is not listed, we can usually build it: custom lengths, mixed connector breakouts, OEM branding and project-specific firmware coding are all supported.

Standard products are held in stock and usually ship within one to three working days. We dispatch worldwide by DHL, UPS, FedEx, TNT or EMS, and for bulk orders we arrange air or sea freight. Shipments can also be sent collect on your own courier account or delivered to your freight forwarder.

We do not ship untested stock. Each transceiver and cable is powered up in our test racks, checked for link stability, transmit power, receiver sensitivity and diagnostic readouts, and only then packed for delivery. This factory-level testing is one reason network integrators keep reordering from us year after year.