Description:CNG300 is very easy installed with powerful various functions, supports SIPV2 and H323V4. CNG300/4022 achieve the best combination of cost and quality,the CNG300/4022 can also calls over Ip to reduce costs, and call over PSTN automaticly when IP routing occur problems ◆Specifications: Support plug&play Support PPPoE Support NAT proxy Support sample fire wall function. Support Virtual server Support DHCP customers service Support DHCP server Support DNS Domain Name Support Diversion of incoming call Support Hot- line and Number inquiry in turn Support Incoming number display/incoming number identification(call ID indentification) Support Antipole identification and sending antipole. Support One set multi number Support Intelligent routing Support Power-off protection Support In-band& out-band(RFC2833)under DTMF Support Number interval adjustment under DTMF Support Gain adjustment. Support Size adjustment for Media streaming packet Support echo elimination Via G168 Support Fax and Redundant adjustment Via T38 Support VAD and CNG Support Frame Loss compensation Support Dynamic JitterBuffer for interference of vibration Support Voice tape and IVR Programmable function up to 16 sessions. Support Main-backup server Support phone voice IVR configuration Support Sample Network protocol(SNTP) Support STUN penetration Support WEB, Console, Telnet configuration Support Remote upgrading software and protection of network. Adjustable audio Frames Adjustable Payload Size Dynamic Programmable Jitter Buffer VAD-Voice Activity detection CNG-Comfort Noise Generation TOS Set Support Adjustable DTMF Timer Ral Time Fax via T38, T30 Auto Call Routing Selection(IP and PSTN) Debug Log. ◆Physical Interface CNG300/4022 One Rj45 port WAN Ethernet 10/100baseT One Rj45 port LAN Ethernet 10/100baseT One Rj45 port for Console Two Rj11 FXS Ports and Two FXO Ports CNG300/4040 One Rj45 port WAN Ethernet 10/100baseT One Rj45 port LAN Ethernet 10/100baseT One Rj45 port for Console Four Rj11 FXS Ports CNG300/4004 One Rj45 port WAN Ethernet 10/100baseT One Rj45 port LAN Ethernet 10/100baseT One Rj45 port for Console Four Rj11 FXO Ports CNG300/4041 One Rj45 port WAN Ethernet 10/100baseT One Rj45 port LAN Ethernet 10/100baseT One Rj45 port for Console Four Rj11 FXS Ports and one save life port