Nortel Networks 1000 User Manual

Page 392

392

NT6D80 MSDL card

Table 157
Asynchronous interface specifications (cont’d.)

Parameter

Specification

Configured

Data rate

0.3, 0.6, (1.2), 2.4, 4.8, 9.6,
19.2, and 38.4 kbps

Software

Stop bits

1 (default), 1.5, 2

Software

Transmission

Full Duplex

N/A

Interface

RS-232

Software

RS-422

Switches

Mode

DTE or DCE

Switches

Emulation mode Each port can be configured to emulate a DCE port or a
DTE port by setting the appropriate switches on the MSDL. For details on
how to set the switches, refer to

“Installation” (page 395)

of this document.

DCE is a master or controlling device that is usually the source of
information to the DTE and may provide the clock in a synchronous
transmission linking a DCE to a DTE.

DTE is a peripheral or terminal device that can transmit and receive
information to and from a DCE and normally provides a user interface to
the system or to a DCE device.

Interface Each MSDL port can be configured as an RS-232 or an RS-422
interface by setting the appropriate switches on the card.

Table 158 "RS-232 interface pin assignments" (page 392)

lists the RS-232

interface specifications for EIA and CCITT standard circuits. It shows the
connector pin number, the associated signal name, and the supported
circuit type. It also indicates whether the signal originates at the DTE or
the DCE device.

This interface uses a 26-pin (SCSI II) female connector for both RS-232
and RS-422 circuits.

Table 158
RS-232 interface pin assignments

Pin

Signal name

EIA

circuit

CCITT
circuit

DTE

DCE

Frame Ground (FG)

102

—

Transmit Data (TX)

103

Receive Data (RX)

104

Request to Send (RTS)

105

Nortel Communication Server 1000

Circuit Card Reference

NN43001-311

02.06

Standard

27 August 2008