Optical Network Design and Implementation

Chapter 5. SONET Architectures

This chapter includes the following sections:

• SONET Integration of TDM signals— This section describes Synchronous Optical Network (SONET) integration of TDM signals.

• SONET Electrical and Optical Signals— The differences between the terms OC-N and STS-N are discussed in this section.

• SONET Layers— The four SONET optical interface layers—path, line, section, and photonic—are described in this section.

• SONET Framing— SONET framing of the Synchronous Transport Signal level 1 (STS-1) is described in this section with a description of the SONET envelope, payload, and path overhead.

• SONET Transport Overhead— SONET provides substantial overhead information, allowing simpler multiplexing and greatly expanded operations, ...