... model. IAD04(W:4S) the 4port VOIP gateway includes 4 FXS ports gateway,and with 1 WAN and 1-4 LAN ports,and ... module, packet filter, IP port shielding, anti URL attack Support signaling, media, fax encryption, anti-interference and sniffing, AES standard 128 ... function. l Compatible l interoperatability l Compatiable with voice gateway,IAD,AG,MG devices with H.323 and SIP protocol from l CISCO ...