PON: Passive Optical Network
Passive Optical Splitter - no power, just refract and duplicate the optical signal
OLT: Optical Line Terminal
ONT: Optical Network Terminal
ONU: Optical Network Unit
GPON: 2.4G Downstream with 1490nm / 1.2G Upstream with 1310nm
XGS-PON: 10G Downstream with 1577nm / 10G Upstream with 1270nm