In 2016, I released the book Enterprise Voice in Skype for Business Server 2015. It is the definitive tome on connecting Skype for Business with the phone system. As time has passed, purchases of the book have basically fallen off the cliff.
I’m now giving the book away for free. Why would you want to download this?
1.) It’s free so duh
2.) Much of what is in here is what was ported to Teams. If you are unsure of calling plans and other things like that, this book will help explain
3.) The appendix on Regular Expressions is probably the most useful chapter nowadays. The chapter gives plenty of examples for successfully creating Regular Expressions specific to calling.
If you want to read the back story of why and how I created the book, you can read that here.