question about ISDN modem

[Seing]

Hi, I am setting up 2 w2k boxes with ISDN modems. The
first w2k box will call the other box and establish a
connection between them via ISDN. I do not have the line
from the telco yet. The 2 boxes are currently at the same
location. Is it possible to test the ISDN modems by
connecting a cable between them? If so, what cable should
I use? Appreciate your answers.

Seing

 

[Jetro]

You can't connect two ISDN device back-to-back..