Transceivers that change the way you compete

QSFP28 100G Loopback

QSFP+ Loopback

The Electrical Loopbacks from EOPTOLINK intend to support Datacom, Infiniband, Fiber Channel applications, which provide a method for port operations testing in board and system. They are hot swappable, constructed of metal cast for excellent EMI performance.

EOPTOLINK’s QSFP28 Electrical Loopbacks are compliant with the QSFP+ Multi-Source Agreement (MSA) Specification SFF8436 and SFF8661. They comply with parallel applications for 4 x (100M~27.95G) Specification. Digital diagnostics functions are available via a 2-wire serial interface, as specified in the QSFP+ MSA.


  • Supports 4 x 27.95Gb/s rates
  • Compliant with QSFP+ MSA SFF8436, SFF8661
  • Dual LED indicator to display module status
  • Built-in digital diagnostic functions
  • Operation case temperature range -40C to +85C
  • 1.5W~5W & customized power consumption
  • Automatically shut down & self-protection


  • Board and system level testing
  • Test and measurement
  • Switch and Router chamber testing

Ordering information

PN Power Consumption 
EOLQ-1HG-XLB-1 1.5~2W
EOLQ-1HG-XLB-2 2~2.5W
EOLQ-1HG-XLB-3 2.5~3W
EOLQ-1HG-XLB-4 3~3.5W
EOLQ-1HG-XLB-5 3.5~4W
EOLQ-1HG-XLB-6 4~4.5W
EOLQ-1HG-XLB-7 4.5~5W