DHI-ARD821-W2-B

"• Dialing to the digital receiver in the CMS(Central Monitoring Station) • Transmitting CID(Contact ID) protocol"

"8-channel local alarm input (expandable to 72 channels); supports NO/NC detector, detector tamper, short circuit and mask alarm. 4-channel alarm output (expandable to 84 channels); supports forced start/shutdown, auto control, and alarm linkage. Multiple zone types, such as instant zone,"