Abstract: A telemetry base station for use in a system also including a patient worn EKG monitor and transmitter, and a physician monitoring station. The base station is microprocessor controlled, and includes a receiver for receiving FM EKG transmissions from the patient transmitter, an A to D converter, a conventional telephone set, used as an intercom to communicate with the physician, and a data modem which is used for digitized transmissions of the EKG signals. Base station functions including selection of data or voice transmission are controlled by a physician monitoring station. The base station includes simulated telephone ringing functions which assist in its use by patients without specialized training.