Nortel Circuit Card Installation Manual page 396

Page 396 of 906
Figure 84
MSDL functional block diagram
System software
MSDL software modules
Boot Code
P
S
O
S
+
Meridian Link
553-3001-211 Standard 3.00
NT6D80 MSDL card
Application
Module Link
System
AML Handler
& Loader
Modules
AML Loadware
Physical Layer (Layer 1) Handler
Port 0 Port 1
Meridian Mail
August 2005
D-Channel
System
DCH Handler
MSDL Handler
System Interface Module
DCH Loadware
Port 2
PRI Trunk
CPU Bus
Port 3
PRI Trunk
553-5433