2008-10-31 I have done serious testing of the mISDN ... 11 years ago
I have done serious testing of the mISDN drivers. Sofar in TE mode (terminal equipment). Ingredients for testing were an analog phone and analog modem connected to a fritzbox connected to the ISDN card and another asterisk testserver quite willing to play hours of music on hold or very short answers to calls. The fritzbox does not have the built-in answering machine I expected but the modem was also very good in dialing out on command (I had to dig up how to make cu dial in to another system again) or in listening for a ring, answering the phone and giving it up after a while. The driver worked, in the first few hours of testing I saw 2 spurious kernel messages. What I am worried about is the memory use, I think it slowly leaks kernel memory.
Tomorrow I'll be at the meeting of the network group which means the other test Asterisk server will be unavailable anyway. After I return I'll have a look at changing the setup to NT mode and see how things work then.