Source QSFP28 Transceivers in Bulk for Deployment

Network teams upgrading links to 100G frequently require QSFP28 optics in volumes that vary from project to project, and purchasing new stock is not always the most practical approach. 

ETech Devices supplies refurbished QSFP28 transceivers for business deployments, subject to inventory availability. 

For each enterprise QSFP28 transceiver enquiry, we review the equipment and project details to identify suitable modules for the required deployment. 

Identify the 100G Optics Your Links Require

A QSFP28 module transmits 100 Gbps across four lanes, each running at 25 Gbps. Because reach and fiber type vary by variant, you should determine the variant you need instead of depending solely on the form factor. Every QSFP28 fiber module is built for a particular fiber type and reach.

Common Variants and Reach

• SR4: Uses multimode fiber with an MPO/MTP connector and supports reach up to 100 m over OM4 fiber.

• LR4: Uses single-mode fiber with duplex LC connectors and supports reach up to 10 km.

• CWDM4: Uses duplex single-mode fiber with LC connectors and supports reach up to 2 km.

• PSM4: Uses parallel single-mode fiber with an MPO/MTP connector and typically supports reach up to 500 m. 

Reading a Module Label

A module's part number can help identify its model and optical variant. Check it against the vendor's documentation before ordering a replacement.

Where QSFP28 Ports Sit

QSFP28 ports are widely found on leaf and spine switches, aggregation layers, and high-speed server NICs. Depending on the platform, port configuration, and supported optics, some QSFP28 ports can operate at lower speeds or support breakout connections to four 25G links. A data center QSFP28 module deployment must take into account each port's supported speed and breakout mode.

Confirm Switch Compatibility Before You Order

Some switches check transceiver vendor coding and may flag or reject third-party optics, depending on the platform and software version. The intended platform needs to accept a compatible QSFP28 transceiver. Certain switches provide software settings for third-party optics, though support differs depending on the model.

Information to provide in a request

• Brand and model of the switch or NIC

• Software version, if available

• Port speed and breakout mode

•  Module variant and reach

• Fiber type and connector

• Quantity and delivery timeline

Decide Where Used Modules Fit and Where New Stock is Needed

A used QSFP28 module may be suitable for spare inventories, lab builds, and phased rollouts that need extra units of an existing part. It serves as a practical choice when the equipment accepts third-party coding and no support contract mandates manufacturer-branded optics.

Conditions That Require New Stock

• Support contracts that mandate manufacturer-branded optics

•  Platforms that restrict ports to original-vendor coding

• Links with strict optical performance requirements where the available module's specifications or test records cannot establish suitability

Verify Condition and Test Status Through Our Vendors

Condition can vary between used QSFP28 optics, so review the stated grade and available test status for the specific units before purchase. When you buy refurbished QSFP28 optics, the available test records help you assess the condition of the quoted units.

Condition and Test Information to Review 

• Condition of the cosmetics and connectors

• Whether digital diagnostics were read, covering transmit power, receive power, and temperature.

• Whether the module underwent link testing on a compatible platform

• Applicable warranty terms for the quoted modules 

Before ordering, buyers can review the condition and test information supplied. 

Plan Volume Orders Across Sites and Regions

Deployments spanning multiple sites require corresponding variants, quantities tailored to each site, and a defined delivery timeline. As a B2B QSFP28 transceiver supplier, ETech Devices reviews inventory availability against your specifications, quantities, and deployment requirements. 

Volume and Wholesale Requests

For QSFP28 optics wholesale orders, availability depends on the required variant, quantity, and current inventory. ETech Devices can be your trusted bilk QSFP supplier who will review the requested quantities, specifications, and delivery schedule before preparing a quotation.

Regional Requirements

Inquiries regarding refurbished QSFP28 optics in the USA, QSFP28 optics in Canada, or QSFP28 optics in Europe should specify the delivery destination as well as any relevant import or compliance requirements. Buyers should also confirm expected dispatch dates, freight charges, and any applicable import duties before approving an order.

Request a Quote for Your QSFP28 Requirements

As a QSFP28 network module supplier, ETech Devices can review requests for refurbished modules for replacements, upgrades, and multi-site deployments. 

Share your switch or NIC model, required variant, fiber specifications, quantity, and delivery destination, along with your target delivery date. 

Our team can review available QSFP28 inventory and provide a quotation for suitable modules based on your specifications and quantity requirements. 

Frequently Asked Question

Is a QSFP28 module equivalent to a QSFP+ module?

No. QSFP+ is commonly associated with 40G connections, while QSFP28 is commonly used for 100G connections. Although their form factors are similar, confirm the port's supported speed and transceiver requirements before ordering.

Do you test the modules you source?

ETech Devices provides available test-status information for the quoted modules. Depending on the unit, records may include diagnostic readings and link-test results. Review the available documentation when evaluating your quotation.

Is it possible to connect a QSFP28 module to an SFP28 port?

Not directly, as a standard single-port connection. A QSFP28 port may support a breakout connection to four SFP28 ports when the host device, port configuration, transceiver, and breakout cable support that arrangement. Confirm the platform's documentation before deployment.

Is it acceptable to mix module variants on a single link?

Both ends of an optical link must use compatible transceivers. Confirm that the optical standard, fiber type, connector, wavelength, and transmission distance match the intended connection.

Can QSFP28 modules be swapped out while the switch is running?

QSFP28 modules are typically hot-pluggable, so they can be replaced without powering down supported equipment. Procedures, however, differ by platform. Before replacing a module, consult your switch documentation and follow the manufacturer's guidance.