Voice Over IP Services ITSCI
VoIP technology is made up of different protocolsVoice over IP (internet protocol), aka VoIP, is the technology that lets you make voice calls using broadband connections. This means that unlike with phone calls, you don’t need a public-switched telephone network (PSTN) to make a call. To make and receive calls over the internet, you can use any VoIP-enabled device, a computer with VoIP software, or even a landline phone connected to an analog telephone adapter (ATA).
How does voice over IP work?When you speak into the microphone of your device, you generate analog voice signals, which are converted into packets of data (aka “compression”). These VoIP packets are transmitted over the internet and converted back to analog voice signals (or “decompression”) for the person on the other end to understand. The process of compression and decompression is made possible by special algorithms called codecs (COder-DECoder).
Session initiation protocol (SIP): Real-time convos Session initiation protocol is responsible for starting, establishing, and ending real-time conversations between two or more people, whether on a two-way or multi-party call. This is possible through “SIP trunking,” which is a service that’s usually offered by an internet telephony service provider (ITSP).
The ITSP uses a SIP trunk to connect one or multiple channels to your private branch exchange phone system (or PBX), so you don’t need a physical connection to a telephone company—and you can make calls over the internet. Think of a SIP trunk as the virtual version of a traditional phone line (it's installed over your internet connection rather than through wires).