- The XS cable is Proterial’s new entry-level Category 6 cable. The XS cable is UL Verified, sweep tested to 555 MHz and delivers electrical performance that exceeds the ANSI/TIA 568.D-2 standard. Like all of Proterial’s indoor Category 6 cables, the XS cable is eligible for our Lifetime product and performance warranty. The XS is available in a wide range of colors.