Phone functions
- 2 SIP accounts configuring independently
- Geographical redundancy of a SIP server (support for up to 4 SIP redundant servers)
- Flexible dialplan
- Operation without a SIP server
- Caller name and number displaying (Caller ID)
- Mute
- Redial
- Different ring-tones for different accounts
- Call history
- Local phonebook for 200 phone numbers
- LDAP Remote Phonebook
- Speakerphone mode
Value Added services
- Call Hold
- Call Transfer
- Call Waiting
- Call Forward on Busy
- Call Forward on no response
- Call Forward unconditional
- Do not Disturb mode (DND)
- Caller Line Identification Restriction (CLIR)
- 3 Way-conference
- Hotline/warmline
Display and indicators
- 128х64 Backlit monochrome display
- Interface language selection (English and Russian)
- Account registration status indicator
- Functional keys: message (with light indicator)1, do not disturb,
transfer, conference, call hold, headset, mute, redial,
speakerphone, volume + and – - Programmable keys2
- 2 SIP lines keys with status indicators
VoIP protocol
- SIP
Audio codec support
- G.711 a-law, µ-law
- G.723.1
- G.726
- G.729 (A/B)
Voice standarts
- Voice activity detection (VAD)
- Comfort Noise Generation (CNG)
- Echo Cancellation, G.165, G.168 (AEC)
Monitoring and management
- Management Web interface (Russian and English)
- SSH
- Telnet
- Autoprovision (TR-069, DHCP)
Diagnostics
- Device status monitoring via the web interface
- Displaying of debugging information in Syslog, Telnet
Network protocols and security
- Data network connection: Static, DHCP, PPPoE
- Time and date synchronization via NTP
- 802.1p, DSCP traffic marking
- Support for NAT traversal: STUN mode, Public IP
- Support for SIP over TLS
- Support for SRTP
Specifications
- RFC 3261 SIP 2.0
- RFC 3262 SIP PRACK
- RFC 4566 Session Description Protocol (SDP)
- RFC 3263 Locating SIP servers for DNS lookup SRV and A records
- RFC 3264 SDP Offer/Answer Model
- RFC 3311 SIP Update
- RFC 3515 SIP REFER
- RFC 3891 SIP Replaces Header
- RFC 3892 SIP Referred-By Mechanism
- RFC 4028 SIP Session Timer
- RFC 2976 SIP INFO Method
- RFC 2833 RTP Payload for DTMF Digits, Flash event
- RFC 3108 Attributes ecan and silenceSupp in SDP
- RFC 4579 SIP Call Control – Conferencing for User Agents
- RFC 3361 DHCP Option 120
- RFC 3550 RTP A Transport Protocol for Real-Time Applications
- RFC 3611 RTP Control Protocol Extended Reports (RTCP XR)
Technical features
- Realtek 8972C processor
- SDRAM 128 MB
- SPI Flash 16 MB
- Linux software
- Software redundancy
Physical features
- 2хRJ45 10/100Mbps Ethernet ports
- 1хRJ9 (4P4C) for handset connection
- 1хJack 3.5 mm or 1xRJ49 (4P4C) for hands-free connection2
- Power over Ethernet technology
- Power consumption: no more than 3.5 W (maximum current
- consumption 0.7 A)
- Power adapter: 5 VDC, 2A
- Operating temperature: from +5°С to +40°С
- Operating relative humidity at +25°С: up to 80%
- Desktop case
- Dimensions: 223x178x89,5 mm
- Weight: no more than 0,52 kg
1 Not available in firmware version 1.4.0
2 Depends on the hardware version