Never did any WE stuff, but ran quite nicely on ATT Definity switches, as well as Nortel CO stuff that I didn't necessarily know about. We did a lot of Mitel switches as well. For most of the big iron (as opposed to typical large, or small (like the Panasonic 12 line 32 station PBXs) our resident metal scratcher had worked with an outfit in Buffalo called Voice Technologies Group that did set emulation integration with whole bunch of different enterprise or CO level switches.
The net effect of that for me was that all the VTG integrated swiches "looked" the same to me, since the VTG interface and Mikey's abstration layer served to make them all look the same from a call control/call progress standpoint. Mikey took whatever data the switch sent him, translated it into AVT pidgin, I acted on it, and then handed him an aknowledgement that he translated into Wombat or whatever and handed back to the switch.
i know that we never did any Western Electric stuff, because I generally had to go to the manufacturer's site to help Mikey sus out what he had to do to translate their protocols to look like AVT standard protocols. (I was one of the principals with AVT back when there were 5 of us and we could recognize a telephone 3 out of 4 times when shown one) up until we got bought out by crooks who didn't care what we did or whether we were any good at it or not, (which is a long story in itself).
Good old days for engineers. We never knew how good we really were, we just worked like dogs to keep up with what we thought the competition had, when a lot of the time we were miles ahead of them and didn't know it. A young man's game, and we were good at it. "Hey, Jipsah, we need you in Toronto tomorrow, you good?" Of course the answer was always yes.
Now the daughters (3 of them) are successful in their own right. The professional violinist (this is Nashville, after all), the doctor, and the aeronautical engineer. I'm a barista at a local coffee shop, and wifey babysits the youngest grandbaby and watches Korean videos. Sic transit gloria mundi. <Laugh>