What are VoIP Servers ?
VoIP is an abbreviation for Voice Over IP, ie. the transmission of voice over the Internet. A VoIP service in essence, consists of a computer that can make phone calls to anywhere in the world. It may be PC to PC or PC to phone, landline or mobile. The voice signals are converted into data packets that travel over the Internet using a VoIP platform, and then converted back into the recipient.
Using VoIP requires specific modules in the router or switch that have the digital processors (DSPs). In this case, the router or switch are called as voice gateways.