These Digital Transmitter Systems are used for complete automation of the far-flung signals from various sites, into a easy to use interface, which can be tapped (input or output) from anywhere up to the distance of 10 Km, without requirement of the repeaters or amplifiers. These incorporate bus powered devices and are highly insusceptible to noise disturbances and are instrumental in providing an absolutely digital communication. The bus and power wiring can be easily installed in the same conduit, thus, saving upon space.