... Products type:IAD04(W:4S) Voice FXS/FXO: 4 voice FXS/FXO ports: 4 FXS;interface: 10/100BASE-T WAN port,1-4 10/100BASE-T LAN ports;1 ... Security l Embedded firewall module, packet filter, IP port shielding, anti URL attack Support signaling, media, fax encryption, anti-interference and ... phone calling or fax through internet and trunking gateway l support FXS and FXO 1:1 binding for 2 PSTN number for one ...