OLT Optical Line Terminal
OLTM Optical Line Terminating Multiplexer
Optical line terminal OLT
Optical Line Transceiver Board OLT
integrated optical unit IOU
non-line optical materials
OLS Optical Line System
OLTM Optical Line Terminal Multiplexer
on-line optical spectroscopy analysis
optical line amplification
Optical Line Amplifier OLA
optical line monitoring
optical line protection
optical line termination