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Introduction to the Compaq FTAM Responder
OSI/FTAM Responder Manual—425199-001
1-5
The Responder and Underlying Subsystems
•
Compaq application, presentation, and session service provider (TAPS) processes
perform the services of the Association Control Service Element (ACSE) in the
Application Layer, plus the services of the Presentation Layer and the Session
Layer. TAPS processes are provided by the OSI/AS subsystem.
•
Transport service provider (TSP) processes perform the services of the Transport
Layer. These processes are provided by the OSI/TS subsystem.
•
Network service provider (NSP) processes perform the services of the Network
Layer and/or the Data Link Layer. These processes are provided by the X25AM
and TLAM (or PAM for G06 and above releases) and TCP/IP subsystems.
The figure also shows the hardware used to implement Data Link Layer and Physical
Layer OSI communications through TLAM (or PAM) or X25AM.