Spirent Launches Industry’s Highest Density 400G Ethernet Solution for Next Generation Network Testing Spirent Communications, an industry leader in test and measurement, today introduced the world’s first 8-port 1U-high rack mountable solution for testing 400/200/100/50 Gigabit Ethernet (GbE). Spirent’s new pX3 400G Appliance is the July 31, 2018 News