VoIP Gateway IAD ATA IP phone adaptor -TVG311B
TVG311B Gateway is an internet based voice network phone terminal. PHONE series IP phone adopts multiple voice control protocols and voice compression coding methods to directly convert analog voice into IP packet for internet transport, thus effectively using the existing bandwidth to provide PSTN quality voice service. Supports SIP,protocols,Support Bridge and Router model.Support 3 public server, offers Two Ethernet interface and is compatible with various softswitch systems and VoIP voice gateways to provide broadband IP voice service.
Features:
Support SIP 2.0 (RFC3261) and correlative RFCsCodec:G.711A/u, G.7231 high/low, G.729, G.722
Echo cancellation: Support G.168, and Hands-free can support 96ms, Hand free Speaker Phone
Support Voice Gain Setting, VAD, CNGFull duplex hands-free speakerphone
NAT transverse:support STUN client
SIP support SIP domain, SIP authentication (none, basic, MD5), DNS name of server, Peer to Peer/ IP call
SIP support 3 Pubic server. Can connect to 3 Public SIP server at the same time
DTMF:Support SIP info, DTMF Relay, RFC2833
SIP application: support Call forward/transfer/holding/waiting
Call control features: Flexible dial map, Hotline, Empty calling reject, Black list for reject authenticated call, limit call, No disturb, Caller ID.
Support three way conference callSupport voice record, 240 seconds max or 3 record max, user-defined record prompt with 1 minute max
Support Phonebook 500 recordsIncoming calls / Outgoing calls / Missing calls. Each support 100 records.
Support conference and voice record on SIP server
8 kind of ring type
English, Spanish, Czechoslovak alternative

Network Features:
WAN/LAN: Support Bridge and Router model
Support basic NAT and NAPT
Support PPPoE for xDSL
Support DHCP Client on WAN
Support DHCP Server on LAN
Support VLAN (optional: voice vlan/data vlan)QoS with DiffServ
Support DMZSupport VPN (L2TP/UDP TUNNEL)
Support DNS Relay, SNTP Client, Firewall
Network tools in telnet server: Including ping, trace route, telnet client

Maintenance and Management:
Web ,telnet and keypad management
Management with different account right
Upgrade firmware through POST mode
Upgrade firmware through HTTP, FTP or TFTP.Telnet remote management./ Upload/download setting file
Safe mode provide reliability
Supoort Auto Provisioning (upgrade firmware or configuration file)
Support Syslog
Specifications:WAN 10/100Base- T RJ-45 for LANLAN 10/100Base- T RJ-45 for PCPower Consumption Idle:1.5W active:1.8WLCD size N/AOperation Temperature 0～40°CRelative Humidity 10～65%Main Chipset CM5000SDRAM 64MbitsFlash 16MbitsDimension(W×H×D) 120*77*30mmWeight 0.3kg