Introduction to Networking for NonStop S-Series Servers
Communications Product Concepts and 
Components
Introduction to Networking for HP NonStop S-Series Servers—520670-005
2-5
Communications Subsystems
A communications subsystem consists of one or more subsystem processes and 
various other subsystem components running in the NonStop system, and possibly a 
protocol module running on a ServerNet adapter or ServerNet wide area network 
(SWAN) concentrator. The concept of a process is described in Processes
 on 
page 2-6; protocol modules are described in Levels of Protocol Support
 on page 2-8; 
ServerNet adapters and SWAN concentrators are discussed in Communications 
Hardware Concepts on page 2-19.
Figure 2-2. Subsystem Interactions
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