Product images are provided for reference and may not represent the exact model, configuration, or included components.

No Bots, Just Experts

Questions about this product? Free pre-sales support from a senior specialist — product questions, compatibility checks, BOM quotes, price confirmation — typically answered within one business day. Need camera placement or system design work? Engineering time is $175 per hour (qty 1 = 1 hour). Hardware buyers get up to one hour ($175) credited back on their order.

Description

StarTech LOOPBACKPLUG100G QSFP28 100G Passive Electrical Loopback Module

Overview

The StarTech LOOPBACKPLUG100G is a passive electrical loopback module designed for testing 100 Gigabit Ethernet QSFP28 ports and transceivers. It provides a cost-effective method for verifying network equipment functionality and troubleshooting connectivity issues without requiring active components. This module is essential for network engineers and technicians performing diagnostics on high-speed network infrastructure, ensuring ports are operational before full deployment or during maintenance cycles.

Compatibility

This loopback module is compatible with any system utilizing QSFP28 ports supporting 100GbE standards. It adheres to MSA (Multi-Source Agreement) standards, ensuring broad compatibility with network devices such as switches, routers, and servers from various manufacturers. It is designed to test ports compliant with IEEE 802.3ba 40GBASE-SR4 and 40GBASE-LR4 standards, effectively looping back signals at up to 100 Gbps.

Installation Notes

The LOOPBACKPLUG100G operates passively, requiring no external power source. Simply plug the QSFP28 connector into the port you wish to test. The module is rated for operation in extreme temperatures ranging from -40°C to 75°C, making it suitable for deployment in diverse environmental conditions, including industrial settings. Its compact design measures 5.0 inches (126 mm) in length, 0.7 inches (18.8 mm) in width, and 0.5 inches (13.3 mm) in height, with a weight of 1.3 oz (38 g).

What's in the Box

  • 1x QSFP28 100G Passive Electrical Loopback Module
Specifications
Adapter Type: Passive
Data Rate: 28 Gbps per lane
Total Data Rate: 100 Gbps
Impedance: 100 ohm
Industry Standards: IEEE 802.3ba 40GBASE-SR4, IEEE 802.3ba 40GBASE-LR4, MSA Compliant
Connector A: QSFP28
Operating Temperature: -40C to 75C
Storage Temperature: -40C to 75C
Product Length: 5.0 in [126 mm]
Product Width: 0.7 in [18.8 mm]
Product Height: 0.5 in [13.3 mm]
Product Weight: 1.3 oz [38 g]
Warranty: 2 Years
Brand: StarTech
MPN: LOOPBACKPLUG100G
Type: Expansion Module
Type: Expansion Module
Connectivity: Ethernet
Q&A
Reviews
Have Questions?

StarTech QSFP28 100G Passive Electrical - LOOPBACKPLUG100G

$81.99

RELATED PRODUCTS

Save $2.68
NETGEAR ACC763-10000S 100G QSFP28 To 100G QSFP28 3-Meter - ACC763-10000S
Add to Cart The item has been added

NETGEAR ACC763-10000S

NETGEAR 100G QSFP28 To 100G QSFP28 3-Meter - ACC763-10000S

3-meter passive direct-attach copper (DAC) cable connecting 100G QSFP28 ports back-to-back

  • Delivers full 100 Gbps throughput over 3 meters with no transceivers required.
  • Passive DAC design eliminates optical modules, reducing cost on short rack runs.
  • Compatible with NETGEAR M4300/M4500/M7300 and third-party QSFP28 platforms.
Usually Ships in 2-3 Weeks Free shipping over $499
$70.67 $67.99 Save $2.68
The item has been added Add to quote
$70.67 $67.99 Save $2.68
Save $2.68 Add to cart Add to quote

System Design, Deployment & Technical Support

Support services and planning resources for commercial surveillance, access control, and infrastructure deployments.

Fixed scope • Fixed price

System Design Assistance

  • Get help validating product compatibility
  • Coverage requirements
  • Storage planning and deployment architecture before you buy.
Request Design Help

Deployment & Configuration Support

  • Access fixed-scope support for rollout planning
  • User setup guidance
  • Migration and system standardization across single-site or multi-site deployments
View Support Services

Guides, Tools & Calculators

  • PoE requirements
  • Storage retention
  • Camera selection and deployment methodology
Open Technical Resources