Alrighty let’s learn some vocab
POTS lines, aka plain old telephone system, are what you’re referring to when you say landlines
When you’re calling off of Wi-Fi, most of the time you’re using a technology called VoLTE- Voice over LTE, which still functions on top of TCP/IP
The difference that matters here is the VoIP and VoLTE, as well as Wi-Fi calling are all digital protocols over TCP/IP networks.
If you really wanna get specific, most digital phone systems use protocols called Telephony, and SIP(session initiation protocol)
I work in telecommunications. This is pretty much exactly correct.
Not really a rebuttal to anything you said, but to expand on the fact that WiFi calling uses VoLTE “most of the time”, which is true because in some conditions SIP is used, but if you are using an Android or iOS phone, you are always using a modem, the voice line is never analog, and all digital voice communications are sent over TCP/IP.
