Early media is a feature of telecommunication systems that allows the caller to receive audio or video feedback before the actual call is connected. It is also known as pre-connect media or ringback tone. Early media is used to provide callers with feedback that the call is being processed and to keep them engaged during the call setup process.
The call flow for early media depends on the specific telecommunication system being used. However, the basic call flow for early media is as follows:
The caller initiates a call to the callee.
The caller’s device sends a SETUP message to the telecommunication system.
The telecommunication system sends a PROGRESS message back to the caller’s device. The PROGRESS message includes an indication that early media is being sent.
The telecommunication system sends early media to the caller’s device. The early media can be in the form of a ringback tone, a message, or any other form of audio or video feedback.
The callee’s device receives the call and sends a CONNECT message to the telecommunication system.
The telecommunication system sends a CONNECT message to the caller’s device, and the actual call is connected.
In some cases, early media can also be used to provide callers with additional information about the call before it is connected. For example, a caller might receive a message informing them that their call is being recorded or that they have reached a voicemail system.
One of the advantages of early media is that it can help to reduce call abandonment rates. Callers are more likely to stay on the line if they receive feedback that their call is being processed, even if they have to wait for the actual call to connect.
Early media can be implemented in a variety of telecommunication systems, including Public Switched Telephone Networks (PSTN), VoIP systems, and Unified Communications systems. The specific implementation and call flow may vary depending on the system being used.
In conclusion, early media is a feature of telecommunication systems that allows callers to receive audio or video feedback before the actual call is connected. It is used to keep callers engaged during the call setup process and can help to reduce call abandonment rates. The call flow for early media involves sending a PROGRESS message to the caller’s device, sending early media to the caller’s device, and then connecting the call once the callee has answered. Early media can be implemented in a variety of telecommunication systems and can take many forms, including a ringback tone or a message.