FIELD: radio engineering, communication.
SUBSTANCE: in one version, said data include data (e.g., an MSD or FSD) embedded within one or more real-time protocol packets such as RTP control protocol (RTCP) packets, that are interspersed within the voice or user data stream (carried in e.g., RTP packets) of an emergency call. Described are apparatus and methods for transmitting the data portion reliably from the initiating terminal (e.g., an in-vehicle system) to a public safety answering point (PSAP), by using the same transport connection as the user data.
EFFECT: determining priority of emergency calls.
39 cl, 12 dwg
