1. Reboot your system with a DOS 6.22 or older boot disk. IMPORTANT The diagnostic must be run under MS-DOS, NOT the DOS window Under the Windows. 2. Modify the "isdn.ini" with correct ISDN Switch information using notepad. Put your second ISDN phone number in the "B1 called number field". This is the number for the program to do the self-call testing. 3. Type "tjisdn". 4. The diagnostic program will do the self-testing and try to make a call from first line to the second line. 5. After the testing, the program will exit automatically. 6. Type "q" or "cntl-c" will stop the program at anytime. 7. The program will generate a log file, "isdn.log". Please e-mail this file, "isdn.log" to tiger@tjnet.com.Download Driver Pack
After your driver has been downloaded, follow these simple steps to install it.
Expand the archive file (if the download file is in zip or rar format).
If the expanded file has an .exe extension, double click it and follow the installation instructions.
Otherwise, open Device Manager by right-clicking the Start menu and selecting Device Manager.
Find the device and model you want to update in the device list.
Double-click on it to open the Properties dialog box.
From the Properties dialog box, select the Driver tab.
Click the Update Driver button, then follow the instructions.
Very important: You must reboot your system to ensure that any driver updates have taken effect.
For more help, visit our Driver Support section for step-by-step videos on how to install drivers for every file type.