The text discusses the differences between IP/VoIP and SIP trunking in telecommunications. VoIP, or Voice Over Internet Protocol, refers to data being transferred over the internet, including voice calls. SIP (Session Initiation Protocol) is a set of rules used for multimedia communications, such as initiating and terminating data transfer between users. The main difference between them is that while VoIP is limited to voice data, SIP can handle various types of multimedia data like voice, text, or video. Additionally, SIP operates over any network, including ISDN (physical phone network), VPN, or the internet, whereas a VoIP call requires a computer and software connections. SIP trunking is part of the network you run your calls on, while VoIP calls are controlled by a separate provider.