Details About The Name "POS"
POS (packet over SONET) is a double-nested abbreviation. The S represents "SONET/SDH", which itself stands for "Synchronous Optical Network/Synchronous Digital Hierarchy". Given this information, POS technically stands for "Packet over Synchronous Optical Network/Synchronous Digital Hierarchy".
Read more about this topic: Packet Over SONET/SDH
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