Abstract: A system, a method and computer-readable media for monitoring the state of a call. A system is provided that includes a user device configured to send and receive voice packets over a bearer path and further configured to send and receive signaling messages over a signaling path. The system also includes a media gateway configured to communicate the voice packets to the user device over the bearer path. In addition, the media gateway is configured to monitor the bearer path and to generate status messages indicating whether the bearer path is still active. The system further includes a call agent configured to maintain a record of the call by attempting to communicate with the user device over the signaling path and by utilizing the status messages received from the media gateway.

Abstract: A terminal adapter such as a residential gateway or an eMTA is configured to receive a set of signals such as a 403 message from network devices operating in a VoIP network. In response to receiving the signals, the terminal adapter provides audio information to a caller at a telephone. For example, when the caller attempts to make a call, the terminal adapter receives a 403 message which causes the terminal adapter to play an audio file to the caller.

Abstract: Embodiments of the present invention provide methods, systems, and computer-readable media for achieving a higher call completion rate in a system experiencing a mass calling event. The present invention has several practical applications in the technical arts including optimizing use of network resources during a mass calling event. In various embodiments, a network's resources are efficiently utilized by way of sampling a network element's control processing unit utilization. Additionally, the various embodiments respond by selecting to negatively acknowledging callers in a mass calling event state in order to prevent system components from becoming overloaded. Overloaded network system components lead to such issues as dropped signaling packets, and higher percentages of call failures. Embodiments of the invention are directed to achieving optimal call completion in the case of a mass calling event.