And please DONT start making DS0 again. I have made a LOT of money on those over the last 30 years, but no one knows how to work them anymore and giving a tester a script and a button to push doesnt make it.
Geez, I didn't think DDS or ISDN existed anymore. We don't make or support it any longer, even if we wanted to, most of the parts aren't available, that was all through hole stuff. It would all need a total redesign. We do still make HDSL stuff, they tried to discontinue it but people still want it.
Funny you say that. I had to do some BRI for the military last year and we didn't even have a BRI module for test set anywhere within the company. I had to go to eBay to find one. Same for our 4-wire local loop DDS module.
HDSL is primary way of delivering most T1 these days. BTW, who do you work for making telecom solutions?