Owner's manual

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