User manual

Chapter 3: Software Installation - Windows NT 3-43
Echo User's Manual, ver. 0.00
Technical tips
1. You can test the additional serial ports with a program like
Terminal or HyperTerminal.
2. A test program is available on the DFlex DOS Driver
diskette (p/n: DISK306). It is a Windows 95 and Windows
NT compatible test program. For more information please
check the file sertest.zip. This program requires a loopback
connector (see the file readme.pts on the DFlex DOS Driver
diskette for loopback wiring instructions)
3. There is no direct support for RS-485 half duplex
communications within the Windows NT serial driver.
4. The RS-422 interface will work in point to point, full duplex
and multi-drop communications.
5. Some Windows 95 and Windows NT applications can only
access up to COM9. These applications include:
Modem Setup Wizard
Printer Setup Wizard
Visual Basic
Terminal
For developers a work around is available under Microsoft
C++. You can label serial ports as COM1, COM2..., etc., for
serial ports 1 to 9. An alternative method is to label them as
\\.\COM1, \\.\COM2..., etc. You can access all serial ports under
Windows NT and Windows NT using this alternative method.
See your Microsoft C++ documentation for more
information.