OSI/AS Configuration and Management Manual

Introduction
OSI/AS Configuration and Management Manual—424119-001
1-3
OSI/AS Architecture
Figure 1-1 illustrates how the various layers of the OSI Reference Model are supported
for users of Compaq OSI/AS over both WANs and LANs.
Figure 1-1. Compaq OSI Architecture: OSI/AS and Underlying Subsystems
011CDT .CDD
Transport
Data Link
Physical
Layer
LAN
TLAM/PAM
Subsystem
Controllers
50-ohm
Baseband
WAN
X25AM
Subsystem
Controllers
RS-232C,
RS-449,
X.21, V.35
Application (ACSE)
Presentation
Session
OSI/TS
Subsystem
OSI/AS
Subsystem
Network