Nortel Networks Circuit Card 311 - Manual (Page 394)

394 NT6D80 MSDL card
Figure 103 "MSDL functional block diagram" (page 395) 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 01.04 Standard
Release 5.0 23 May 2008
Copyright © 2003-2008, Nortel Networks
.