Table 178 wire test signal leads cycle counts – Nortel Networks Circuit Card 311 User Manual

Page 425

Dialing operations

425

Wire test mode

The DAC allows for the EIA signaling leads to be tested to facilitate
installation and troubleshooting. This feature can be invoked through the
service change downloaded parameters, or by setting the appropriate front
panel switch. Wire test mode only operates when the port is idle. The leads
are cycled ON and OFF in 0.5 second periods (ON for 0.5 seconds, OFF for
0.5 seconds) for the number of cycles shown in

Table 178 "Wire test signal

leads cycle counts" (page 425)

. The lead status can be monitored by the

front panel LEDs. The test is run indefinitely until the front panel switch is
turned off, and the software wire test parameters are disabled.

Note: For the most accurate results, be sure no equipment is connected
to the EIA leads.

Table 178
Wire test signal leads cycle counts

Cycle count

Label

EIA Signal Lead

description

Pin

RS-232-C

RS-422

TxD

Transmit

RxD

Receive

CTS

Clear To Send

—

DSR

Data Set Ready

—

DCD

Carrier Detect

—

DTR

Data Terminal Ready

—

Ring Indicator

—

Note: The CTS signal is not included in the faceplate LED. Therefore, a
1.5-second delay occurs between the RxD lamp going on, and the DSR lamp
going on.

Independent storage of dialing parameters

Two dialing parameters, DCD control, and Answer mode, can be modified
by both keyboard and Hayes dialing commands.

The Hayes dialing mode also allows the user to modify the Input echo
control, and Prompt/Result codes transmit control. With keyboard dialing,
the Input echo control and Prompt/Response codes control are determined
by the downloaded parameters. They cannot be altered through dialing
commands.

Nortel Communication Server 1000

Circuit Card Reference

NN43001-311

01.04

Standard

Release 5.0

23 May 2008