A controller may be provided to monitor and record various activities associated with remotely located equipment, e.g. a vending machine or a service vehicle. The controller may also be operable to communicate over multiple wireless communication paths with remotely located equipment, handheld devices...http://www.google.es/patents/US7778600?utm_source=gb-gplus-sharePatente US7778600 - Apparatus and method to provide multiple wireless communication paths to and from remotely located equipment
Apparatus and method to provide multiple wireless communication paths to and ...
