IP phone/VoIP Phone with POE,LED Key, LCD,PSTN ports,3 way conference;

WSS220 IP Phone Basic Features:

Support SIP 2.0 (RFC3261) and correlative RFCs

Support PSTN and IP

SIP supports multi SIP servers. Can connect to multi SIP servers at the same time.

CodecG.711A/u, G.7231 high/low, G.729a/b,G.722,G.726

Echo cancellation: G.168 Compliance in LEC, additional acoustic echo cancellation(AEC) can reach 96ms max filter length in hands-free mode  

Support Voice Gain Setting, VAD, CNG

Full duplex hands-free speakerphone

SIP support SIP domain, SIP authentication (none, basic,MD5), DNS name of server, Peer to Peer/ IP call DTMFSupport SIP info, DTMF Relay, RFC2833 9 kind of ring type and 1 user-defined music ring (optional) Advanced Application Features

Large dot matrix LCD display and soft keys make user easier to use

Friendly graphic menu 2 headset interface ( 2.5mm Jack or RJ9 connector) 

Multilanguage realizes localization

SIP application: support call forward/ transfer (blind/attended/alert)/ holding/ waiting/ 3 way talking/ conference/ paging and intercom/ call park/ pickup/ join call/ redial and unredial/ click to dial/ vport/secondary dialing automatically/ push to talk

Call control features: flexible dial map, hotline, empty calling no. reject service, black list for reject authenticated call, white list, limit call, no disturb, caller ID, CLIR (reject

the anonymous call), CLIP (make a call with anonymous), Dial without register

Incoming calls /outgoing calls / missing calls. Each support

100 records.

Support Phonebook 500 records

Support voice record on SIP server(optional)

Support SMS

Support Memo

Support alarm clock

Support Speed dial

Support XML  

Maintenance and Management

Web ,telnet and keypad management

Management with different account right

Upgrade firmware  through POST mode

Telnet remote management/ upload/download setting file

Safe mode provide reliability

Support Auto Provisioning (upgrade firmware through HTTP, FTP

or TFTP)

Support Syslog

Network Features

WAN/LAN: 10/100M Ethernet ports, supports Route,and Switch mode.

Support PPPoE for xDSL

Support basic NAT and NAPT

NAT transversesupport STUN client

Support DHCP client on WAN

Support DHCP server on LAN

Support main DNS and secondary DNS server.

Support VLAN

Support DMZ

Support DNS Relay, SNTP Client, Firewall

Support VPN (L2TP/UDP TUNNEL) , Open VPN/TLS, SRTP security protocol

QoS with DiffServ

Network tools in telnet server: including ping, trace route, telnet client