The present invention relates to a microprocessor-based method and apparatus for controlling wireless communications (via cellular radiotelephone or some other known means) into or out of a controlled, institutional environment, such as a prison, military base, hospital, school, business or government...http://www.google.fr/patents/US20010036821?utm_source=gb-gplus-shareBrevet US20010036821 - COMPUTER-BASED METHOD AND APPARATUS FOR CONTROLLING, MONITORING, RECORDING AND REPORTING WIRELESS COMMUNICATIONS
COMPUTER-BASED METHOD AND APPARATUS FOR CONTROLLING, MONITORING, RECORDING ...
