We had a guy come fly in to train a couple of new guys who will work primarily on the switch and frame. He asked me to give a basic configuration lesson to them. You can tell he's an old C.O, guy - what I refer to as software and config he calls it 'Translations'.

When I was with Siemens I did a lot of PRI work. NI-2 I believe was the most common D-Channel protocol, I think 5ESS was an option too.