Help for Enterprise PBX Tech Moving to Teams Phone System

I have worked years in both Voice and IT. I am proficient in MS Servers and Desktops, Cisco Routers and Switches and Traditional Telephony / PBX Dial Plan and Call Routing Architecture...that architecture tends to be similar between all tradtional PBXs from AVAYA, Fujitsu, Nortel, etc...

Are there any documents, guides or videos that explain MS Teams Phone System Architecture from the traditional Telephony / PBX point of view?