| ONT (Optical Network Terminal) |
ONU (Optical Network Unit) |
OOO (Optical-Optical-Optical) |
opaque OXC (opaque Optical CROSS-Connect) |
open circuit |
| open-loop algorithm |
Open Shortest Path First (OSPF) |
open source |
open source software (OSS) |
open standard |
| Open Systems Interconnection Model |
open wire |
operating system (OS) |
operations, administration, management, and provisioning (OAM&P) |
operations and maintenance (O&M) |
| operations support system (OSS) |
operator |
operator |
operator |
OPS (Off-Premises Station) |
| optical |
optical add/drop multiplexer (OADM) |
Optical Carrier (OC) |
optical character recognition (OCR) |
optical cross-connect (OXC) |
| optical data unit (ODU) |
optical-electrical-optical (OEO) |
optical fiber |
optical fiber, conductive (OFC) |
optical fiber, conductive, plenum (OFCP) |
| optical fiber, conductive, riser (OFCR) |
optical fiber, nonconductive (OFN) |
optical fiber, nonconductive, plenum (OFNP) |
optical fiber, nonconductive, riser (OFNR) |
optical isolator |
| optical line-of-sight (optical LOS) |
optical line terminal (OLT) |
optical mark recognition (OMR) |
optical network terminal (ONT) |
optical network unit (ONU) |
| optical-optical-optical (OOO) |
optical transport network (OTN) |
optical transport unit (OTU) |
optics |
OPX (Off-Premises eXtension) |
| OQPSK (Offset Quadrature Phase Shift Keying) |
orange hose |
orderwire |
.org (organization) |
original band (O-Band) |
| original equipment manufacturer (OEM) |
or ITU-TSS) |
orthogonal |
orthogonal frequency division multiplexing (OFDM) |
oscillate |
| oscillate |
oscillator |
oscillator |
OSI Reference Model (Open Systems Interconnection Model) |
OS (Operating System) |