Nortel Networks 1000 - Manual (Page 732)

732 NT8D41BA Quad Serial Data Interface Paddle Board
Functional description
The NT8D41BA QSDI paddle board has four asynchronous serial ports.
These serial ports are connected to the I/O panel in the back of the shelf
using special adapter cables. The serial ports can be used to connect the
Meridian 1 system to a terminal, a printer, a modem, or to an other system
processor.
The QSDI paddle board design contains four Universal Asynchronous
Receiver/Transmitters (UARTs) and the logic necessary to connect the
UARTs to the system processor bus. See
Figure 250 "NT8D41BA QSDI
paddle board block diagram" (page 732) . Other logic on the card includes
baud rate generators, RS-232-C driver/receiver pairs, and the switches
and logic needed to configure each UART.
Figure 250
NT8D41BA QSDI paddle board block diagram
System considerations
In dual-processor Meridian 1 systems, the QSDI paddle board behaves
differently depending on which backplane socket it is installed. Installing
the paddle board into a socket in the network area of the backplane allows
Nortel Communication Server 1000
Circuit Card Reference
NN43001-311 02.06 Standard
27 August 2008
Copyright © 2003-2008 Nortel Networks
.