IP-телефон

IP Phone PH217 completely follows VOIP standard offered by ISO, setting in two Protocols: SIP and IAX2, fully compatible with SIP industry standard and can interoperate with many other SIP compliant devices and software in the market. Simple IP phone for home users. Support Protocol: SIP (RFC3261, RFC2543) Support IAX2 protocol Support codec: G.711A/u, G.722,G.723 high/low, G.729 A/B Support G.168 echo cancellation standard, compliant 96ms echo cancellation with speaker mode Support voice volume adjustment, including IN/OUT of handset and speaker Support Jitter Buffer, VAD, CNG, SIP, Domain name register, point-to-point Call Support RTP and RTCP Support the Inbound/Outbound transmission; SIP info, DTMF Relay, RFC2833 Support many countries' standard ring Support NAT: Support STUN, CITRON, AVS Mode Support SIP domain, SIP Authentication (none, basic, MD5), Domain Name parse Support two SIP server , including Pubic Server/ Private server, can make a call by any proxy. You can back-up and select any above SIP server. Support SIP application, including SIP Call forward/ transfer/ holding/ conference/ pickup/ redial/ unredial/ joincall Network Features: Support PPPoE for xDSL, and support auto redial when disconnect Support DHCP Client for WAN Support DHCP server for LAN Support DNS relay for LAN and provide DNS service for LAN Network equipment Support DNS domain name resolution in WAN port Support router and switch function in LAN port Support SNTP Client to get time from internet Support advanced DSP tech to ensure high quality voice Support advanced jitter buffer tech to prevent the info package delaying and losing Support network tool: ping, trace route, telnet client Support three modes to configure WAN port IP, they are: static, DHCP, and PPPoE Support NAPT Provide firewall for small LAN Provide optional priority level for small LAN Support second layer QoS (802.1p) Support VLAN Support VPN (L2TP)Special and Advanced Function: Caller ID display, ban calling out, avoid-disturb setting, auto-answering, auto dial while picking up the telephone, quick dial; Call waiting, call transfer, three ways call, and multi-dial forward Setting the black list and limit numbers Support point to point call Setting the ended number methods Setting the ended number add, delete and substitution Setting the fixed calling ways Support phone number with name and number Support Silence Suppression, VAD (Voice Activity Detection) Support CNG (Comfort Noise Generation) Support Echo Suppression and AGC (Automatic Gain Control) Support DIGEST validate and MD5/MD5-sess encapsulation Support remote auto configuration and edition auto-upgrade. Management and maintainence Support safe mode and update via saft mode Support configuration via web, keypad, http, telnet; support the user IP address filtering limits Support update software and configuration files through HTTP, FTP, TFTP Support syslog Support set up a number of authorities and user name, password support reverse Telnet through NAT / firewall machine for remote management.