14 Troubleshooting Guide
14 Troubleshooting Guide
The most common problems when using NetCom
+
are caused by a failure in the configuration of
network parameters. This is a list of some symptoms, and tests to check them.
1. First examine the network configuration of your computer. Open a console window (MSDOS
command prompt), and use the command IPCONFIG /ALL to retrieve the information.
Among other information some data is displayed as this:
Ethernet adapter Local Area Connection:
Description..................:
<Your LAN card>
Dhcp Enabled.................:
Yes
Autoconfiguration Enabled....:
Yes
IP Address...................:
192.168.1.154
Subnet Mask..................:
255.255.255.0
DHCP Server..................:
192.168.1.1
If DHCP is activated, and there is a DHCP server found, the configuration is OK. A com-
mon problem is an IP Address like 169.254.xxx.yyy, because this is an automated address of
APIPA. If no DHCP server is present in the network, a static configuration is recommended.
Here we prefer the range of 192.168.1.1 up to 192.168.1.254 for computer and NetCom
+
.
Change the computers configuration, and select a similar address for NetCom
+
.
2. Start the NetCom Manager program. Search for the device, the Manager performs a discovery
of available NetCom
+
devices. Check the properties of each device for a matching serial
number. Once the NetCom
+
is identified, check the IP Address and the Netmask.
If all this information is displayed as Zero, the IP settings do not match your computers
settings. To correct this, you need administrative privileges for your computer. Start the
NetCom Manager as Administrator, and configure correct parameters in the NetCom
+
. Close
the Manager program.
3. Important: The default configuration of NetCom
+
may result in a fixed IP Address. It will
be the same for all connected devices. As a side effect the Manager can not send a dedicated
configuration to a certain device. Therefore it is best to connect several NetCom
+
one by
one, configure them, connect the next and search for that device.
4. Try to PING the NetCom
+
. Open a console window and use PING <IP-Address of NetCom
+
>
to send some data. The replies should reach your computer in a few milliseconds. If they
time out, check the IP parameters again.
5. Telnet to the NetCom
+
. Open a console window, and use the Telnet <IP-Address of NetCom
+
>
command to connect. The configuration menu appears. If not, open NetCom Manager, and
check the setting of
Telnet port
in the NetCom
+
. The default is the name "telnet", or the
number 23.
6. Telnet to the serial port of NetCom
+
. Open a console window, and use the Telnet <IP-
Address of NetCom
+
> <data port> command to connect.
Everything you type is sent
out through the serial port. Every data received is displayed on the screen. To check the
operation, place a standard loopback plug to the serial port. Then you see your own data as
an Echo while typing.
September 2016
NetCom Plus User Manual
127
