Functional description 833
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 274 "NT8D41BA QSDI
paddle board block diagram"(page 833). 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 274
NT8D41BA QSDI paddle board block diagram
System considerations
In dual-processor Meridian 1 systems, the QSDI paddle board behaves
differently depending on which backplane socketit is installed. Installing the
paddle board into a socket in the network area of the backplaneallows it to
work when either of the system processors is active. Installing the paddle
board into a socket in the CPU area of the backplane allows it to work only
when that CPU is active.
Nortel Communication Server 1000
Circuit Card Reference
NN43001-311 01.04 Standard
Release 5.0 23May 2008
Copyright© 2003-2008, Nor tel Networks
.