Nortel Networks 1000 - Manual (Page 988)

988 QPC841 Quad Serial Data Interface card
"QPC841 QSDI card block diagram" (page 988) . 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 285
QPC841 QSDI card block diagram
Connector pin assignments
Connector J1 is connected to port one, and uses the RS-232-C standard
DB-25-pinout. Connector J2 is connected to ports two, three, and four, and
is a non-standard pinout that requires an adapter cable. An adapter cable
(NT8D96) splits the J2 signals out to three standard RS-232-C connectors.
Port 2 is connected to connector A, Port 3 is connected to connector B,
and Port 4 is connected to connector C.
Nortel Communication Server 1000
Circuit Card Reference
NN43001-311 02.06 Standard
27 August 2008
Copyright © 2003-2008 Nortel Networks
.