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This QSFP28 Loopback Module is designed for testing 100G ports in switches, NICs, and other QSFP28-equipped devices. It supports passive electrical loopback for verifying signal continuity, link stability, and port behavior without requiring active optics. Test 100G QSFP28 Connections The QSFP28 Loopback Adapter emulates 4-lane electrical testing for QSFP28 ports operating at 100Gbps, and supports 40GBASE and 100GBASE Ethernet. It is MSA compliant and meets IEEE 802.3 requirements for reliable performance and universal compatibility. Accurate Signal Diagnostics Perform electrical loopback testing for full 100G link verification. Ensure consistent signaling with 100Ω impedance and low jitter for stable, repeatable test results under real-world conditions. For Enterprise Network Switches Connect directly to QSFP28 ports on switches, routers, and NICs for inline port testing. Compact and low-power, it is an essential tool for network technicians and IT pros in data centers and edge or on-prem installations. |
| Application/Usage: | Data Networking |
| Application/Usage: | Optical Network |
| Total Number of Ports: | 1 |
| Interfaces/Ports Details: | 1 x 100GBase-X Network |
| Media Type Supported: | Optical Fiber |
| Ethernet Technology: | 100 Gigabit Ethernet |
| Network Technology: | 100GBase-X |
| Maximum Data Transfer Rate: | 100 Gbit/s |
| Minimum Operating Temperature: | -40°F (-40°C) |
| Maximum Operating Temperature: | 167°F (75°C) |
| Color Family: | Silver |
| Product Color: | Silver |
| Product Material: | Plastic |
| Product Material: | Metal |
| Height: | 0.5" |
| Width: | 0.7" |
| Length: | 5" |
| Weight (Approximate): | 0.08 lb |
| Compatibility: | MSA Compliant |
| TAA Compliant: | Yes |
| Environmental Compliance: | Waste Electrical and Electronic Equipment Directive (WEEE) |
| Environmental Compliance: | Restriction of Hazardous Substances (RoHS) |
| Limited Warranty: | 2 Year |
![]() | WARNING: This product can expose you to chemicals including Di(2-ethylhexyl)phthalate (DEHP), which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information, go to www.P65Warnings.ca.gov. |
Product images may differ from actual product appearance.
- This item cannot be shipped to PO Boxes.
- This item can be shipped only within the U.S.
- UPC: 065030923491
- Mfr's Part #: LOOPBACKPLUG100G


Many items at NothingButSavings.com offer FREE Budget Shipping. Plus, as with many
of our competitors which do offer free shipping, we don't ask you to spend a specified
amount in order to qualify for FREE Budget Shipping.









