Abstract: An on-call system and method which utilizes the Internet and WCTP and WAP protocols and is suitable for use with medical personnel and enables users to remotely access information relative to a person and the person's on-call schedule. The system and method permits at least one user to have immediate and direct communication with at least one recipient using the Internet and/or wireless communications systems and methods. The system and method further provides an automated answering and communication service for persons consisting of an interactive Internet-based system and method that uses a centralized database of scheduling information to organize, orchestrate and instantly connect physicians, hospitals and related medical professionals and even patients during both routine and urgent situations. The system and method enables individuals to be grouped or categorized as desired.