Compaq OSI/FTAM D43 - Manual (Page 22)

Introduction to the Compaq FTAM Responder
OSI/FTAM Responder Manual— 425199-001
1 -6
The Responder and Underlying Subsystems
PDUs from a remote FTAM initiator are received by the Compaq system at the Physical
Layer and are transmitted up through the appropriate communications controller (or
adapter), NSP process, TSP process, and TAPS process to the FTAM responder process.
Figure 1-2. Compaq FTAM Responder Architectural Overview
204 CDT .CDD
Network Layer
Data Link Layer
Transport Layer
Session Layer
WAN LAN
Physical Layer
Application Layer
Presentation Layer
TAPS
(OSI/AS)
RS-232C
RS-449
X.21, V.35
NSP
(X25AM)
TSP
(OSI/TS)
50-ohm
Baseband
NSP
(TLAM or PAM)
50-ohm
Baseband
NSP
(TLAM or PAM)
Controllers Controllers Controllers Controllers
RS-232C,
RS-449,
X.21, V-35
NSP
(X25AM)
LAN WAN
Tandem FTAM
User Application
API
TSP
(TCP/IP)