Nortel Circuit Card 311 Reference page 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
leads cycle counts" (page
front panel LEDs. The test is run indefinitely until the front panel switch is
turned off, and the software wire test parameters are disabled.
Table 178
Wire test signal leads cycle counts
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.
Copyright © 2003-2008, Nortel Networks
.
Note: For the most accurate results, be sure no equipment is connected
to the EIA leads.
EIA Signal Lead
Label description
TxD Transmit
RxD Receive
CTS Clear To Send
DSR Data Set Ready
DCD Carrier Detect
DTR Data Terminal Ready
RI Ring Indicator
Nortel Communication Server 1000
Circuit Card Reference
NN43001-311 01.04 Standard
Release 5.0 23 May 2008
425). The lead status can be monitored by the
Pin
2
3
5
6
8
20
22
Dialing operations 425
Table 178 "Wire test signal
Cycle count
RS-232-C RS-422
1
2
—
3
4 —
5 —
—
6
7 —
1
2