VoIP glossary - O

The HipTel VoIP dictionary (VoIP glossary) was created to help our users understand common VoIP terminology. Use the search feature to look up VoIP terms, or look up terms alphabetically. Have a question, still unsure what something means? Feel free to contact us.

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OSI Reference Model — The OSI Reference model stands for Open Systems Interconnection Reference Model. It is an abstract layered description for communication and computer network protocol design. The OSI model consists of seven layers: Physical Layer, Data Link Layer, Network Layer, Transport Layer, Session Layer, Presentation Layer, and Application Layer.