Good Quality S4G Wireless Voip Phone For Office Desk 4 Lines Voip Phone

•  CPU Core: MIPS24KEc@360MHZ

•  8MBytes Flash

•  32 MBytes SDRAM

•  128*64 Graphic LCD with white back light

•  4 soft keys


•  4 line keys with red-green dual color LEDs for indication


•  MENU,SMS,HOLD


•  Volume+,Volume- and navigate key MUTE

•  AC/DC Adapter

           -AC Input: 100~240V,50~60Hz

           -DC Output: 5V, 1A

•  IEEE802.3af PoE in WAN port(IP542P only)

•  2 RJ45 ports(Ethernet 10/100 Base-T)


•  3.5mm earphone jack


•  3dB internal antenna for 802.11n 1T1R

•  Operation Temperature: 0~50 Degree C


•  Storage Temperature: -25~85 Degree C


•  Relative Humidity: 10%~90% No Condensing

•  G.711(A-Law,-Law)with PAMS above 4.3


•  G.723.1


•  G.729A/AB with PAMS above 4.0


•  Adaptive Jiter Buffer Management


•  Voice Activity Detection


•  Comfort Noise Generation


•  Echo Cancellation

•  SIP V2 (RFC 3261 ,3262,3263,3264)


•  Backward Compatible with RFC2543


•  Session Timer (RFC4028)


•  SDP (RFC2327)


•  TRP/RTCP (RFC1889 and RFC2915)


•  STUN (RFC 3489)


•  ARP/RARP (RFC 826/903)


•  TFTP/HTTP/HTTPS for Auto Provisioning


•  Message Waiting Indicator (RFC 3842)


•  DHCP Option Codes for SIP (RFC 3361)


•  DNS/DNS SRV (RFC1760 and RFC 2782)


•  IEEE802.1Q VLAN/802.1 and IP TOS

•  SMS Function


•  MAC Address Cloning


•  SIP proxy redundancy: dynamic via DNS SRV, A records


•  Direct IP to IP calling


•  Built-in NAT Router


•  VPN

•  Firmware Upgradeable


•  Web Management Interface


•  Password Management


•  Local and Remote Syslog (RFC 3164)


•  Auto Provisioning: TFTP, HTTP and HTTPS


•  TR069

•  4 lines


•  Auto Answer


•  3-way Conference


•  Call Hold


•  Call Pickup


•  MWI


•  CID and CWCID


•  DTMF Relay: In-band, Out-band (RFC2833) and SIP Info


•  Full-duplex Speakerphone


•  Delayed Hotline


•  Redial


•  Dial Plan


•  Volume Adjustment


•  Handset/Headset, Speaker and Ringer