A messaging unit (16) equipped with a cellular transceiver (38) is attached to a mobile item (12) located within a communications network (10). The messaging unit (16) issues a feature request having data digits that represent information on the mobile item (12). The cellular transceiver ...http://www.google.de/patents/US5771455?utm_source=gb-gplus-sharePatent US5771455 - Data messaging in a communications network using a feature request
Data messaging in a communications network using a feature request
