Instructions

UM-0085-B09 DT80 Range User Manual Page 254
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A PPP session will also be automatically terminated if the USB cable is disconnected, or the modem connection drops
out.
Troubleshooting
This section discusses a few possible reasons why a PPP connection may fail to connect. The error messages listed
here are the common ones returned by Windows XP. Windows Vista is somewhat less helpful in that it simply indicates
that "the connection failed", which could be due to any of the reasons below.
 Error 663 – Modem already in use or not configured properly
This indicates that Windows could not open the specified COM port. Check that:
• the cables are properly connected
• you specified the correct COM port when creating the Windows modem device
• no other programs (e.g. DeTransfer) are currently using the specified COM port
 Error 691 – Access is denied
Check that the username and password specified in the Connect dialog exactly match that configured in the DT80
profile.
 Error 777 – Modem or remote computer is out of order
This indicates that the expected responses were not received from the DT80. Check that:
• for direct RS232 cable connections, the specified maximum baud rate matches that configured in the DT80
profile
• the port function setting in the DT80 profile is set to COMMAND or PPP
• if a modem is used, it appears to be dialling and connecting successfully. If not then check phone number and
phone line
 Slow connection
When connecting, if there is a long pause (up to 60 seconds) during which Registering your computer on the network
is displayed, this normally indicates that Windows is requesting a particular PPP option but that the DT80 is rejecting it.
One such option is "software compression"; ensure that this option is unchecked
in the PPP Settings dialog (Figure 103).
Network Services
Unless otherwise specified, the TCP/IP network services described here operate the same way regardless of the
hardware interface used (Ethernet, serial PPP, DtUsb or integrated modem).
Using the Network Command Interface
Connecting
To access the DT80's command interface over Ethernet you need to use a terminal program on the host computer that
can send/receive text to a TCP port. DeTransfer and DeLogger support this. By default, TCP Port 7700 is used; this can
be changed in the DT80 profile if required.
Using DeTransfer, for example, you first need to set up a connection. This is the same as setting up a connection for
RS232 or USB, except that instead of specifying a COM port number, you now need to specify an IP address. The
following screen shot illustrates this.