Nortel Networks Circuit Card 311 - Manual (Page 1106)

1106 QPC841 Quad Serial Data Interface card
The QPC841 Quad Serial Data Interface card contains four universal
asynchronous receiver/transmitters (UARTs) and the logic necessary to
connect the UARTs to the system processor bus. See
Figure 315 "QPC841
QSDI card block diagram" (page 1106) . The other logic on the card consists
of four baud rate generators, four RS-232-C driver/receiver pairs, and the
jumpers and logic needed to configure the UARTs.
The address select switches and logic on the card always address the
UARTs using two pairs of addresses: 0 and 1, and 2 and 3 through 15
and 16. The pairs do not need to be consecutive. Other switches on the
board determine the baud rate for each individual port and whether the
port is configured to talk to a terminal (DTE equipment) or a modem (DCE
equipment). Instructions for setting the jumpers are given later in this
section.
Figure 315
QPC841 QSDI card block diagram
Nortel Communication Server 1000
Circuit Card Reference
NN43001-311 01.04 Standard
Release 5.0 23 May 2008
Copyright © 2003-2008, Nortel Networks
.