Building null- modem cables, Building straight- through cables, Troubleshooting serial ports – Comtrol DM ATS-NTe User Manual
Page 31: Using test terminal
PC104 RocketPort Option
31
Building Null-Modem Cables
Building Null-
Modem Cables
Use the following figure if you need to build a null-modem cable. A null-modem
cable is required to connect the CONSOLE port to a PC COM port or to connect
DTE devices.
Note: You may want to purchase or build a straight-through cable and purchase a
null-modem adapter.
Building Straight-
Through Cables
Use the following figure if you need to build a straight-through cable. Straight-
through cables are used to connect DCE devices.
Troubleshooting Serial Ports
The following subsections discuss the following utilities that are installed on the
ATS-NTE:
•
Test Terminal program (wcom32.exe), which can be used to troubleshoot
communications on a port-by-port basis.
•
Port Monitor program (portmon.exe), which checks for errors, modem control,
and status signals (
on Page 33). In addition, it provides
you with raw byte input and output counts.
•
Peer Tracer program (peer.exe), which traces driver events (
Using Test Terminal
WCOM32 is a terminal program that enables you to open a port, send characters
and commands to the port, and toggle the control signals.
Note: WCOM32 will not work on ports used by RAS if Remote Access Service is
running or any other application is using the port.
If you have started RAS service on any of the ports you want to test, you
must stop RAS on those ports before starting WCOM32. To test ports that
are not used by RAS, you do not need to stop RAS.
AT
S
-N
T
E
F
e
m
a
le
TxD
RxD
RTS
CTS
DSR
GND
DCD
DTR
Signal
RxD
TxD
CTS
RTS
DTR
GND
DCD
DSR
Signal
DB9
2
3
8
7
4
5
1
6
Pins
DB25
3
2
4
7
8
6
Pins
RJ45
4
5
1
8
7
3
6
2
Pins
20
5
RI
N/A
9
22
RI
DB9
3
2
7
8
6
5
1
4
Pins
9
RJ45
5
4
1
3
6
7
Pins
2
8
N/A
DB25
2
3
4
5
6
7
8
20
Pins
22
PC
C
O
M
P
o
r
t
AT
S
-N
T
E
F
e
m
a
le
DB9
1
2
3
4
5
8
6
7
Pins
DCD
RxD
TxD or TRx-
DTR
GND
CTS
DSR
RTS or TRx+
Signal
DB9
1
2
3
4
5
8
6
7
Pins
DCD
RxD
TxD or TRx-
DTR
GND
CTS
DSR
RTS or TRx+
Signal
RI
9
9
RI
RJ45
6
5
4
2
3
8
7
1
Pins
N/A
RJ45
6
5
4
2
3
8
7
1
Pins
N/A
DB25
8
3
2
20
7
5
6
4
Pins
22