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## Central processor complex channel subsystem 

## 5 

This chapter describes the concepts of the z15 channel subsystem, including multiple channel subsystems and multiple subchannel sets. It also describes the technology, terminology, and implementation aspects of the channel subsystem. 

This chapter includes the following topics: 

GLYPH<SM590000> 5.1, “Channel subsystem” on page 206 

GLYPH<SM590000> 5.2, “I/O configuration management” on page 214 

GLYPH<SM590000> 5.3, “Channel subsystem summary” on page 215 

