Abstract: A circuit and method to decrease power consumption of fast infrared links. Reduced power consumption allows continuous infrared standby in battery-powered (and other power-consumption sensitive) devices. A low speed, low power-consumption infrared receiver preamplifier is used in conjunction with a higher speed, higher power-consumption infrared receiver preamplifier. While the battery-powered device awaits an infrared transmission, the low power-consumption receiver preamplifier operates in standby mode and the high power-consumption receiver preamplifier is in shutdown mode. Because the higher power consumption receiver preamplifier is in shutdown mode, standby power consumption is reduced and time between battery recharging is increased. When the low power receiver preamplifier detects an infrared transmission, the high power receiver preamplifier can be activated if high-speed communication is needed. An alternative discloses dual receivers rather than dual preamplifiers in one receiver.

Abstract: A system and a method for modifying the behavioral characteristics of a mobile station terminal according to a functional location. A small transmitter, or button, which utilizes short range radio transmissions is used to define a functional location. The button is identified with particular functions using a device ID. In some of the disclosed embodiments, the button transmits the device ID continuously. In some other disclosed embodiments, the button transmission is triggered by a mobile station in proximity to the button. In some of the disclosed embodiments, the mobile station can store a mapping of device IDs to particular behaviors (or functions). In some other disclosed embodiments, the mobile station can request and receive a set of behaviors based on the device ID from a server attached to a telecommunications network. In some of the disclosed embodiments, receipt of a device ID can trigger a remote set of behaviors via a telecommunications network.