A selective call system (100) has a plurality of base sites (120-124) for communicating with a plurality of selective call receivers (108) with acknowledge-back capability. A base site transmitter (210) transmits signals encoded with a stored location identifier (132), a base site receiver...http://www.google.com/patents/US5684859?utm_source=gb-gplus-sharePatent US5684859 - Method and apparatus for downloading location specific information to selective call receivers 
