Startech
StarTech QSFP28 Loopback Module, 100G Passive QSFP28 Loopback Adapter, QSFP Port Tester, 100G QSFP Loopback Test Plug - MSA Compliant (loopbackplug100g)
- SKU:
- 21500095
- MPN:
- loopbackplug100g
- Availability:
- Usually ships the same or next business day. In stock at our PA warehouse.
- Shipping:
- Calculated at Checkout
- Stock Update:
- 06/18/2026 07:22:51 PM PST
Bulk discount rates
Below are the available bulk discount rates for each individual item when you purchase a certain amount
| Buy 4 or above | and pay only $75.85 each 75.85 |
- Stock Update:
- 06/18/2026 07:22:51 PM PST
Description
This item is brand-new, factory sealed.
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.
Features
Yes
Compatibility:
MSA Compliant
Environmental Compliance:
Waste Electrical and Electronic Equipment Directive (WEEE)
Restriction of Hazardous Substances (RoHS)
Specs
| Physical Characteristics | |
| Product Material |
|
| Weight (Approximate) | 0.08 lb |
| Length | 5" |
| Product Color | Silver |
| Height | 0.5" |
| Color Family | Silver |
| Width | 0.7" |
| Warranty | |
| Limited Warranty | 2 Year |
| Interfaces/Ports | |
| Total Number of Ports | 1 |
| Interfaces/Ports Details | 1 x 100GBase-X Network |
| General Information | |
| Brand Name | StarTech.com |
| Manufacturer Website Address | http://www.startech.com |
| Marketing Information | 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. |
| Product Type | QSFP28 |
| Product Name | QSFP28 Module |
| Manufacturer | StarTech.com |
| Manufacturer Part Number | LOOPBACKPLUG100G |
| Packaged Quantity | 1 Box |
| Media & Performance | |
| Ethernet Technology | 100 Gigabit Ethernet |
| Maximum Data Transfer Rate | 100 Gbit/s |
| Media Type Supported | Optical Fiber |
| Network Technology | 100GBase-X |
| Technical Information | |
| Application/Usage |
|
| Environmental Conditions | |
| Maximum Operating Temperature | 167°F (75°C) |
| Minimum Operating Temperature | -40°F (-40°C) |
Warranty Information
