0 votes 0 votes RS-232 interface (a) Uses only positive voltage (b) Cannot transmit signals over long distance . (c) Uses only negative voltage (d) A logic high uses positive voltage Computer Networks isro-ece computer-networks + – sh!va asked Mar 2, 2017 • retagged Mar 9, 2019 by Naveen Kumar 3 sh!va 359 views answer comment Share Follow See all 0 reply Please log in or register to add a comment.