hello

this is an ignorant question but im confused, if i am on wireless broadband and im using a wireless modem, can i install VOIP software and be able to call peoples lan lines through my internet connection? and if not , then please explain why its not possible

also is it possible to get dsl broadband non wireless(forgot the proper name, what is it again?) installed, and get the internet connection without a telephone? i thought not since then people would never pay for telephone and internet, cause then they can just use their internet alone as a gateway to call people with some sort of VOIP software.

id appreciate some awnsers, my knowledge is really vague when it comes to stuff related to dsl and phone line ISP stuff