This website stores cookies on your computer. These cookies are used to collect information about how you interact with our website and allow us to remember you. We use this information in order to improve and customize your browsing experience and for analytics and metrics about our visitors both on this website and other media. To find out more about the cookies we use, see our Privacy Policy.
The all-new MacBook Pro & MacBook Neo. Performance runs in the family.

StarTech.com 100G Passive QSFP28 Loopback Adapter

Print page
Item#: 42124846 // MFG Part#: LOOPBACKPLUG100G // By: StarTech.com
NOTE: Images may not be exact; please check specifications.
  • Temporarily Out-of-Stock
  • Call for next available delivery
Ordering Information
$110.00 
Qty:

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.


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.


Perform electrical loopback testing for full 100G link verification. Ensure consistent signaling with 100O impedance and low jitter for stable, repeatable test results under real-world conditions.


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.