Audio Features

HD voice: HD handset, HD speaker
Wideband codec: AMR-WB (optional), Opus, G.722
Narrowband codec: G.711(A/µ), G.729AB, G.726, iLBC
DTMF: In-band, Out-of-band (RFC 2833) and SIP INFO
Full-duplex hands-free speakerphone with AEC
VAD, CNG, AEC, PLC, AJB, AGC

Phone Features

3 SIP accounts
Call hold, mute, DND
One-touch speed dial, hotline
Call forward, call waiting, call transfer
Group listening, SMS
Redial, call return, auto answer
Local 3-way conferencing
Direct IP call without SIP proxy
Ring tone selection/import/delete
Set date time manually or automatically
Dial plan, off hook hot line
XML Browser, Action URL/URI
Integrated screenshots
RTCP-XR, VQ-RTCPXR
Enhanced DSS Key

IP-PBX Features

Busy Lamp Field (BLF), Bridged Line Apperance(BLA)
Anonymous call, anonymous call rejection
Hot-desking, emergency call
Message Waiting Indicator (MWI)
Voice mail, call park, call pickup
Intercom, paging, music on hold
Call completion, call recording
Flexible seating
Executive and Assistant
Centralized call recording
Visual voice mail

Management

Configuration: browser/phone/auto-provision
Auto provision via FTP/TFTP/HTTP/HTTPS for mass deploy
Auto-provision with PnP
Zero-sp-touch, TR-069
Phone lock for personal privacy protection
Reset to factory, reboot
Package tracing export, system log

Network and Security

SIP v1 (RFC2543), v2 (RFC3261)
Call server redundancy supported
NAT traveral: STUN mode
Proxy mode and peer-to-peer SIP link mode
IP assignment: static/DHCP
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
OpenVPN, IEEE802.1X
IPv6
LLDP/CDP/DHCP VLAN
ICE

Feature keys

3 line keys with LED
5 features keys: message, headset, redial, tran, hands-free speakerphone
6 navigation keys
Volume control keys