optoelectronic
See opto-electronic.
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Description
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optoisolator
Synonym optical isolator.
OPX
Abbreviation for off-premises extension.
ORAN
Open Radio Access Network
orange book
Nickname for the United States Department of Defense "Trusted Computer System Evaluation Criteria", DOD
520
0. 28-STD [CESG]. Also known as "TCSEC"
orbit
The path, relative to a specified frame of reference, described by the center of mass of a satellite or other object in space subjected primarily to natural forces, mainly the force of gravity. [NTIA] [RR]
orbit determination
The process of describing the past, present, or predicted position of a satellite in terms of orbital parameters. [JP 1-02]
order of diversity
The number of independently fading propagation paths or frequencies, or both, used in diversity reception.
Ordering and Billing Forum (OBF)
The OBF provides a forum for representatives from the telecommunications industry to identify, discuss, and resolve national issues that affect ordering, billing, provisioning, and exchange of information about access service, other connectivity, and related matters.
orderwire circuit
A voice or data circuit used by technical control and maintenance personnel for coordination and control actions relative to activation, deactivation, change, rerouting, reporting, and maintenance of communication systems and services. Synonyms engineering channel, engineering orderwire, service channel.
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