Introduction

Packet over SONET/SDH (PoS) is a layer 2 technology use for packet forwarding over SONET or SDH.

PoS Overview

SONET/SDH was originally developed for TDM voice circuits.
PoS provides the same advantages such as alarm processing, performance monitoring, synchronization and protection switching.
PoS interfaces can be:
- Concatenated: ?????
- Non-concatenated: ?????

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