Basic Feature

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Support SIP 2.0 (RFC3261) and
correlative RFCs

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Support IAX2 (Optional)

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Support PSTN call(Optional)

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SIP supports 4 SIP servers, and backup
SIP servers. Can connect to these SIP servers at the same time.

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Voice Codec：G.711A/u, G.7231 high/low, G.729a/b, G.722,G.726，iLBC，AMR-NB，AMR-WB

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Video Codec: H.263, H.264, MPEG4

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Video solution: QCIF、CIF、QVGA

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Image format: PEG、PNG、GIF
and BMP

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Video format: mp4、3gp
and flv

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

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Support Voice GAIn Setting, VAD, CNG

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Support jitter buffer

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Full duplex hands-free speakerphone

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SIPsupport SIP domain, SIP
authentication (none, basic, MD5), DNS name of server, Peer to Peer/ IP call

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DTMF Relay：support
inband, SIP info, RFC2833

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Support customized music rings

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Support STUN

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Support SMS based on SIP

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Volume(handfree/handset/headset/ring) adjustment

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Professional Speaker/handset HD Voice

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Ergonomic handset(acoustical cochlea)

Advanced Application Features

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Touched, Large dot matrix LCD display
and softkeys make user easier to use

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Friendly graphic menu

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Multilanguage realizes localization

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

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Predial

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Voice recording during talking /local

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Call control features: flexible dial
map, hotline, empty calling no. reject service, black list for reject
authenticated call, white list, limit call, do no disturb, auto answer, caller
ID, CLIR (reject the anonymous call), CLIP (make a call with anonymous), Dial
without register

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Human voice caller ID indication

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Human voice num keypad indication

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Voice recording during talking/auto
answer/local

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Incoming calls /outgoing calls /
missing calls. Each support100 records.

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Support Phonebook 2000 records

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Phone book records export/import

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XML phone book

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Photo frame

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Media player(mp4, mp3, wav, wma)

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Usb disk file management

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System files management

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Support VoIP(SIP/RTP) encryption (e.g.
RC4)

Network Features

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WAN/LAN: support switch mode

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Support PoE（802.3af

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Support DHCP Client on WAN

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Support main DNS and secondary DNS
server

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Support VLAN (Optional)

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Support NTP Client

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Support VPN L2TP , Open VPN/TLS, SRTP,
HTTPS(Optional)

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Support QoS with DiffServ(Optional)

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Support MD5 authentication

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