802.11g SIP DECT VoIP Router VIP-462DG Datasheet Manual Firmware FeaturesFirewall/Security FeaturesBuilt in NAT firewall, DoS (Denial of Service) protectionQoS mechanism to ensure the voice qualitySPI (Stateful Packet Inspection) firewallPolicy-based LAN/WAN access controlRemotes administrator authenticationScheduled access controlVoIP FeaturesSIP 2.0 (RFC3261) compliantSIP proxy callsVoice codec support: G.711, G.723.1A, G.729ABuilt in NAT firewall, DoS (Denial of Service) protectionVoice processing: Voice Active Detection, DTMF detection/ generation, G.168 echo cancellation (16mSec.), comfort noise generation, call progress detection, gain controlPSTN lifeline for emergency callsDECT featuresDECT & GAP CompatibleBase can register up to 5 HandsetsIntercom call during external call, call transfer between handsets, three-way telephone meetingCID 50 locationsRedial memory: 3 locations , 20 digitsAdjustable ringer volume & melody100 hours standby time, 10 hours talk timeHands-Free, Mute functionCall duration time meterTransmission distance: up to 50M indoor / up to 300M outdoor