... PTSN Dual serial ports Wireless Alarm SystemsFeatures:*Dual serial ports, access to wired and wireless keyboard*Support two-way communication ... *Voice indication for operation, LCD display, easy to operate than before*8 wired 32 wireless zone, 32 bus zone, ... arm/disarm timely and freely*Wireless equipment status checking, wireless alarm linkage*Telephone line cut alarm*Indication if door and window ...