Glossary:

ATIS Telecom Glossary

Search Keyword By: O

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OSD

On-Screen Display

OSI

Abbreviation for Open Systems Interconnection.

OSI–RM

Abbreviation for Open Systems Interconnection--Reference Model.

OSPF

Open Shortest Path First

OSS

Operations Support System

OTA

Over The Air

OTAR

Over-The-Air Rekeying

OTDOA

Observed Time Difference Of Arrival

OTDR

Abbreviation for optical time domain reflectometer.

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