The system provides a way to use a single RF channel in a cellular, RF meter reading system. In order to avoid adjacent cell concentrator interference while reducing the overall time required to perform repetitive tasks such as meter reading and performing load survey reads, the system has each of the...http://www.google.com.hk/patents/US5896097?utm_source=gb-gplus-share專利 US5896097 - System for utility meter communications using a single RF frequency
