Voice SMS or Outbound Dialer (OBD) is a technology that automates bulk voice calls to mobile/telephone users and playing pre-recorded messages. Bulk Voice SMS or Outbound dialer system can dial out the required set of phone numbers and play the recorded prompts (messages) and also gather touch-tone inputs from the end-users to measure the response of the bulk voice SMS campaign. Communications between small and large people groups are broadly dictated by the device on hand. When on a wireline or mobile phone, the choice is generally voice.
Voice SMS is a fast way to send a short message to another mobile subscriber that can be retrieved at the subscriber's convenience. In that sense it is similar to an SMS text message. But Voice SMS is much easier to use. There are no keystrokes needed to compose the message. You just talk. When a Voice SMS is sent, an SMS text message is received saying "You have a Voice SMS. Click here to listen to your message." One click and you are listening to your new message via a human voice. In some implementations, the phone reads "Dial *0* to listen to your message. A few clicks with the "Send" key are required, but it is still easy for users.
Voice SMS is perfect when the need to communicate is strong and a live conversation is not in order, for example when you think the other party is likely to be asleep, in a meeting, or in a noisy environment. Voice SMS is a convenient way to give call recipients information or initiate a non-real time conversation, while allowing them to delay their response until it is convenient. Even more important, voice conveys emotion and can provide more in-depth understanding than any text message.