Nortel Networks 1000 - Manual (Page 388)

388 NT6D80 MSDL card
Figure 102 "MSDL functional block diagram" (page 389) shows the system
architecture using the MSDL as an operational platform. It illustrates
operation routing from the CPU, through the MSDL, to the I/O equipment.
It also shows an example in which DCH operation peripheral software in
the MSDL controls functions on ports 2 and 3.
MSDL operations
The system automatically performs self-test and data flow activities.
Unless a permanent problem exists and the system cannot recover, there
is no visual indication that these operations are taking place.
The system controls the MSDL card with software that it has downloaded.
The MSDL and the system enable the MSDL by following these steps:
1. When the MSDL card is placed in the system, the card starts a
self-test.
2. When the MSDL passes the test, it indicates its state and L/W version
to the system. The CPU checks to see if downloading is required.
3. After downloading the peripheral software, the system enables the
MSDL.
4. MSDL applications (DCH, AML, SDI) may be brought up if
appropriately configured.
Nortel Communication Server 1000
Circuit Card Reference
NN43001-311 02.06 Standard
27 August 2008
Copyright © 2003-2008 Nortel Networks
.