Instructions

UM-0085-B09 DT80 Range User Manual Page 248
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Figure 100: List of installed modem devices (Windows XP)
This dialog shows all currently installed modem devices. In the above example the computer's internal dial-up modem is
shown (COM3), along with two null modem cables (which, as far as the computer is concerned, are still "modems"). In
this case it so happens that the COM4 null modem cable is an RS232 cable, while COM5 is a USB cable – although this
is not apparent in this dialog.
5. If the modem (or null modem cable) that you intend to use for PPP is not listed, then you will need to add it,
using the Add button. This will launch the Windows Add Hardware Wizard.
a. If you are using a direct USB or RS232 null modem cable then tick the Don't detect modem; I will select
it from a list option. (If you are using a modem then you can leave this unticked; Windows will then attempt
to automatically detect it. If this fails then you will need to select the modem type from a list, in the next
step.)
b. You should now see a list of different modem types. If you are using a direct USB or RS232 null modem
cable then select the first one in the list, Communications cable between two computers.
c. Select the correct COM port number from the list. If the required COM port number is not listed then double
check that you have closed any connections using that port in DeTransfer or DeLogger.
d. The modem device should now have been added, and you will be returned to the modem list screen
(Figure 100). Verify that the newly added modem device is now present.
6. If a direct RS232 cable is being used then one further step is required. This is not necessary for a direct USB or
modem connection.
a. Select the RS232 cable from the list of modem devices and click Properties.
b. Select the Modem tab and set the Maximum Port Speed field equal to the configured baud rate on the
DT80, then press OK.
The final step is to define a Windows "network connection" using the Network Connection Wizard. This process varies
depending on whether a direct cable or modem connection is used.
4a. PPP Network – Direct Cable Connection
This section describes the process of creating a Windows "network connection", when using a direct USB or RS232
cable connection. If you are using a modem, see 4b. PPP Network – Modem Connection (P251).
The following is applicable to Windows XP
1. From the Start menu, select Control Panel, then Network Connections. This will display a list of currently
defined network connections (if any).
2. Select the New Connection Wizard, or the Create a new connection task. This will start the Network
Connection Wizard.
3. Select Setup an advanced Connection.
4. Select the option to Connect directly to another computer.
5. Specify that you are setting up a Guest connection
6. Enter a name for the connection, e.g. "DT80 USB ppp"
7. Select the appropriate "Communications cable between two computers" modem device from the list.
8. Specify whether you want the connection to be available just for your Windows user name, or for anyone who
uses the computer.