This paper presents the function of the communication system used for Individual Soldier's Equipment Digitization, including its realization by way of wireless net and regional net. Joint Tractical Information Distributed System (JTIDS) is focused on as an example of the integrated information net in the digitized battlefield, including JTIDS TDMA (Time Division Multiple Address) and multiple JTIDS net-working. Finally, one of the security problems of the communication system is discussed.