- Support SIP 2.0 (RFC3261) and correlative RFCs
- Support IAX2,iax2 line call
- SIP support 2 SIP lines. Can connect to SIP1 and SIP2 server at the same time and can incoming and outgoing via any SIP server.
- Support multiple road call waiting in line
- Codec:G.711A/u, G.7231 high/low, G.729a/b, G.722.1,G.726,AMR
- Support HD voice
- Echo cancellation: Support G.168, and Hands-free can support 96ms, Hand free Speaker Phone
- 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
- DTMF Relay:support inband, SIP info, RFC2833
- 9 kind of ring type and 5 user-defined music ring (optional)
- Large dot matrix LCD display and softkeys make user easier to use
- Support headset jack- RJ9
- 4 DSS Key
- Soft keys programmable; function keys programmable
- Multilanguage realizes localization
- SIP application: support call forward/ transfer (blind/attended)/ holding/ waiting/ 3 way talking/ conference/ paging and intercom/ call park/call pickup/ join call/ redial and unredial/ click to dial/ secondary dialing automatically
- 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 SMS and Speed Dial
- Support XML phonebook/browser
- Support SRTP and Blf
- Code synchronization via IP PBX/IMS
- Support click to dial via web phone book
- Voice codec setting for each SIP line
- Hands-free headset ringing choice
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