The service provides voice-over-IP (VoIP) telephony with a number of features designed to give low-cost voice communications. Applications can schedule and send mass phone calls to recipient lists and play a message recorded in a file uploaded with the request. Applications can initiate VoIP calls with buttons or other controls on a web page or initiate callback services that reconnect a local call to a remote recipient via inexpensive VoIP connections.
API methods support Voice Blast to deliver a recorded voice message to specified recipients, from one or a few to a long list. Methods also support voice call functions initiated by controls embedded in web page HTML. The SetuBilling API supports resellers in developing their own click-to-call solutions. A callback API allows a voice call to a local number to trigger a new call between the same parties, local or remote to one another, via VoIP.