Overview of Protocol Standards
Older protocol standards defined electrical interfaces which used source synchronous bus approaches that were described in Chap. 1. As interface standards evolved to higher and higher data rates, most standards turned to specification of high-speed signals implemented with HSS cores. This chapter is by no means a complete summary of all of the protocol standards for which HSS cores are used, nor does this chapter contain sufficient information to design the logic associated with any given protocol standard. The goal is simply to provide the reader with a basic knowledge of some of the more popular standards.
SONET / SDH: Telcordia GR-253-Core
SONET (Synchronous Optical NETwork) is a serial protocol for optical telecom networks used within North America; SDH (Synchronous Digital Hierarchy) is the equivalent protocol used on other...