400G QSFP-DD Loopback Module


BizLink® QSFP-DD loopback module is desgined to test QSFP-DD ports effectively by looping back electrical signal. This module is a 8-channel transmission which supports data rates of up to 400Gbps. QSFP-DD loopback are backwards plug compatible with existing 100G based systems and support 200G (8 channels @ 25G NRZ) or 400G (8 channels @ 50G PAM 4) signaling transmission.


  • Differential impedance: 100 +/- 10Ohm
  • Supply voltage: 3.3V (Typical)
  • Operating temperature: 0 to 70℃
  • Storage temperature: -20 to 80℃
  • Durability: 50 cycles
  • Mating force: 40N max. (Insetion force), 30N max. (Extraction force)
  • Module retention: 125N min.