When you use VoIP, your voice is converted into digital information which is then transmitted in as data over the internet, unlike the way traditional phone lines work via a local phone provider.įor business phone systems, a Private Branch Exchange (PBX) refers to the main piece of tech that routes all your calls, using Session Initiation Protocol (SIP) in SIP trunks to make those connections. Mobile phones operate calls through connection to the PSTN, maintained via a terrestrial network of base stations. These IP packets are received over the packet-switched network, and ‘de-packetised’ as the voice you hear through your VoIP endpoint – the technical term for a VoIP desktop phone, VoIP mobile phone, soft phone application (VoIP Software), or other receiver. In terms of landline calls (or ISDN and PSTN), VoIP bypasses the national landline network’s copper wire by using data packets of information (usually audio) transmitted across a network. ![]() How does VoIP differentiate from traditional phone calls? First, we’ll need to debunk some jargon:
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