needing help on how to make a phone and connecting two players chat?

im trying to make a phone on roblox where you can call a player and the message that you type in bubble chat appear above the other players phone but the thing is i have no idea where to start im trying to start by having the calling portion down first but i dont know how to get two players connected on a two way line would i be in the right direction if i began looking at chat channels? thanks

It may be worth reading up on this https://developer.roblox.com/en-us/articles/Lua-Chat-System

And you'll probably need to use RemoteEvents, so this could be helpful https://developer.roblox.com/en-us/api-reference/class/RemoteEvent