Voximplant call processing concept
Usually people consider a phone call as a connection between two endpoints (a caller and a callee), but in telecom world a call consists of two connections called "call legs": from a phone to a telecom operator’s hardware/software and from a telecom operator’s hardware/software to another phone.
Web and Mobile SDKs
Voximplant SDKs for Web, iOS and Android platforms can be used to enable real-time voice, video and rich text communication in your app or service. In case of calls from/to the SDKs the Internet is used as a transport what significantly decreases the cost of service compared to the phone network. Since Voximplant is already connected to the phone network it’s possible to build web and mobile apps that can communicate with the phone network and vice versa.
Rich feature set