For Dial-Up Networking (if logged):
\windows\modemlog.txt
For ISDN, I don't know if there's a way to log it or not. There is another
log that can be set in Control Panel | Network | Dial-Up Adapter; there may
be one there also for the customer's ISDN terminal adapter (??). At least
with Dial-Up Adapter, this logfile is at:
\windows\ppplog.txt
Here's some handy info:
Enabling PPP Logging in Windows NT
http://support.microsoft.com/support/kb/articles/q115/9/29.asp
How to Interpret the Ppplog.txt File (Windows 95)
http://support.microsoft.com/support/kb/articles/q156/4/35.asp
For the general customer to sift through the logs might be asking too much
though... ??
Josh Hillman
hillman@talstar.com