A flexible patient monitoring system which interfaces a telemetry subsystem with a communications network by way of a telemetry transmission receiving system and a network controller. The telemetry subsystem includes one or more monitoring instruments, a multiport transmitter, a telemetry subsystem interface,...http://www.google.com.au/patents/US5579001?utm_source=gb-gplus-sharePatent US5579001 - Paging-based backchannel in a medical telemetry system
