What a pleasant surprise. The other day I was perched on my studio stool watching my Prima LT ISDN box light up with connection indicators, when who in my wondering ears should appear, but Dave Immer. Mr. ISDN himself.
Dave has a company called Digifon. One of the his many services is providing a “bridge” between incompatible ISDN codecs and IP schemes like Source Connect. Ringside connected with Digifon then Digifon called my box and Dave popped open a mic just to let me know what was going on.
If you are a voice actor wondering about this ISDN thing, Dave has a website is a go-to source for information. And a very melodious voice.