StarTech.com QSFP28 100G Passive Loopback Module, 4 x 28Gbps Lanes, MSA Compliant Port Tester - LOOPBACKPLUG100G

• Passive electrical loopback module for testing 100G QSFP28 ports on switches, routers and NICs
• Emulates 4-lane electrical testing at 100Gbps: 28Gbps per lane across four lanes with 100 ohm impedance
• Supports 40GBASE and 100GBASE Ethernet; MSA compliant and meets IEEE 802.3 requirements
• No optical transceiver required; plugs straight into the port to check signal continuity and link integrity
• Silver metal and plastic module, 126 x 18.8 x 13.3 mm, 38 g; operating temperature -40 to 75°C

The StarTech.com LOOPBACKPLUG100G is a passive QSFP28 loopback module for testing 100G ports on switches, routers and network cards. It plugs directly into the port and loops the signal back, so technicians can check signal continuity, link stability and port behaviour without an optical transceiver.

It emulates four electrical lanes at 28Gbps each with 100 ohm impedance, supports 40GBASE and 100GBASE Ethernet, and is MSA compliant. The compact, low-power module suits data centre, edge and on-premises diagnostics.