The ASXvOLT16 is a 16-10G-port XGS-PON virtual Optical Line Terminal (vOLT) with 4 x 100G/40G QSFP28 ﬁxed ports. The 10G ports, 100G uplink ports, and console/management USB ports are all on the front panel. All 10G ports operate at wire-speed by default and support standard XGS-PON transceivers. The QSFP28 ports support 100G and 40G operation modes, as well as being conﬁgurable as 4 x 25GbE or 4 x10 GbE modes using DAC breakout cables. This vOLT supports redundant hot-swappable PSUs and fans, and is available with a front-to-back or back-to-front airﬂow direction.