US Patent 6847814 Emergency personal device with base station

A communication system is disclosed having a wireless telephone and a base station. The wireless telephone has a transceiver, a microphone, a speaker and a keyboard. The base station is connectable to the wireless telephone by a radio link and is connected to a switched network. The keyboard of the wireless telephone includes an emergency key which dials a pre-stored number and activates the microphone and speaker for hands-free operation of the wireless telephone.