Patent ID: 7004395
Filing Date: 2006-02-28
Classification: G06F,G06K,G06Q,G07C,H01Q,H04B,H04L,H04M,H04W,Y02D

Abstract:
1. A multi-level digital data communication system including: at least one data communication device comprising means, responsive to instructional codes, for processing digital data messages having address codes and data codes and for routing said data messages, means for storing digital data messages coupled to said processing means, first means for communicating said data messages as first radio frequency transmission signals, and second means for communicating said data messages as second radio frequency transmission signals, said first and second radio frequency communication means being communicatively coupled to said processing means for selectively transmitting and receiving data messages to and from each of said first and second radio frequency communication means; at least one first data terminal device comprising first communication means for communicating said data messages as said first radio frequency transmission signals, and means, coupled to said first communication means of said data terminal device, for transducing data signals of data messages of communication between said at least one data communication device and said at least one first data terminal device; and at least one data communication interface device comprising second means for communicating said data messages at said second radio frequency transmission signals, and third means for communicating said data messages to a data station.