OSI/AS Configuration and Management Manual

Introduction
OSI/AS Configuration and Management Manual—424119-001
1-4
OSI/AS Architecture
Figure 1-2 illustrates the data flow between the OSI/AS subsystem and underlying
subsystems, showing the processes and controllers that provide OSI services and
protocols.
Figure 1-2. Data Flow Between OSI/AS and Underlying Subsystems
012CDT .CDD
Transport
Data Link
Layer
Network
Physical
Application (ACSE)
Presentation
Session
802.3 CSMA/CD
Controllers
NSP
LAN
50-ohm
Baseband
IP ES-IS
TSP
TAPS
NSP
LAPB
Controllers
WAN
RS-232C,
RS-449,
X.21, V.35