Nortel Networks Circuit Card - Manual (Page 389)

Page 389 of 906
Circuit Card Description and Installation
426
NT6D80 MSDL card
Contents
This section contains information on the following topics:
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 389
Physical description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 390
Functional description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 392
Engineering guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 397
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 404
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 413
Replacing MSDL cards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 421
Symptoms and actions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 422
System disabled actions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 423
Introduction
This document describes the Multi-purpose Serial Data Link (MSDL) card.
This card provides multiple interface types with four full-duplex serial I/O
ports that can be independently configured for various operations. Peripheral
software downloaded to the MSDL controls functionality for each port.
Synchronous operation is permitted on all MSDL ports. Port 0 can be
configured as an asynchronous Serial Data Interface (SDI).
An MSDL card occupies one network card slot in Large System Networks, or
Core Network modules and communicates with the CPU over the CPU bus
and with I/O equipment over its serial ports. It can coexist with other cards