2 VoIP accounts
Call hold, mute, DND
One-touch speed dial, hotline
Redial, call return, auto answer
Call forward, call waiting, call transfer
132 x 64-pixel graphical LCD with backlight
LED for call and message waiting indication
Dual-color (red or green) illuminated LEDs
Intuitive user interface with icons and soft keys
Multi-language support
Anonymous call, anonymous call rejection
Message waiting indicator (MWI)
Voice mail, call park, call pickup
Intercom, paging, music on hold
Call completion, call recording, hot-desking
SIP v1 (RFC2543), v2 (RFC3261)
IPv6, open VPN
NAT transverse: STUN mode
Proxy mode and peer-to-peer SIP link mode
IP assignment: static/DHCP/PPPoE
HTTP/HTTPS web server
Time and date synchronization using SNTP
UDP/TCP/DNS-SRV(RFC 3263)
QoS: 802.1p/Q tagging (VLAN), Layer 3 ToS, DSCP
SRTP for voice
Transport Layer Security (TLS)
HTTPS certificate manager
AES encryption for configuration file
Digest authentication using MD5/MD5-sess
IEEE802.1X
OpenVPN











