Audio Features
> HD voice: HD handset, HD speaker
> Wideband codec: 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
> 6 VoIP accounts
> One-touch speed dial, redial
> Call forward, call waiting
> Call transfer, call hold
> Call return, group listening
> Mute, auto answer, DND
> 3-way conference call
> Direct IP call without SIP proxy
> Ring tone selection/import/delete
> Hotline, emergency call
> Set date time manually or automatically
> Dial plan
>XML Browser, 
>Action URL/URI
> Integrated Screenshots
> RTCP-XR

Directory
> Local phonebook up to 1000 entries
> Black list
> XML/LDAP remote phonebook
> Intelligent search method
> Phonebook search/import/export
> Call history: dialed/received/missed/forwarded

IP-PBX Features
> Busy Lamp Field (BLF)
> Bridged Line Apperance(BLA)
> Anonymous call, anonymous call rejection
> Hot-desking
> Message Waiting Indicator (MWI)
> Voice mail
> Call park, call pickup
> Intercom, paging, 
> Music on hold
> Call recording

Display and Indicator
> 3.66" 240x120-pixel graphical LCD with backlight
> LED for call and message waiting indication
> Dual-color (red or green) illuminated LEDs for 
line status information
> Intuitive user interface with icons and soft keys
> National language selection
> Caller ID with name, number

Feature keys
> 8 line keys with LED
> 8 line keys can be programmed up to 21
various features (3-page view)
> 8 features keys: message, headset, conference, mute, 
hold, transfer, redial, hands-free speakerphone
> 4 context-sensitive “soft” keys
> 6 navigation keys
> 2 volume control keys
> Illuminated message key
> Illuminated headset key

Interface
> 1xRJ9 (4P4C) handset port
> 1xRJ9 (4P4C) headset port 
> 1XRJ12 (6P6C) EHS port
>Power over Ethernet (IEEE 802.3af), Class 2

Other Physical Features

> Stand with 2 adjustable angles 
> Wall mountable (optional)
> External universal AC adapter (optional)：
AC 100~240V input and DC 5V/1.2A output
> Power consumption (PSU): 1.17～3.32W
> Power consumption (PoE): 1.60～5.94W
> Dimension(W*D*H*T):
265mm x 210mm x 170.5mm x 53.5mm
> Operating humidity: 10-95%
> Operating temperature: -10~50°C

Package Features
> Qty/CTN: 5 PCS
> N.W/CTN: 
> G.W/CTN: 
> Giftbox size: 300mm x 225mm x 118mm
> Carton Meas: 610mm x 310mm x 238mm

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
> Reset to factory, reboot
> Package tracing export, system log

Network and Security
> SIP v1 (RFC2543), v2 (RFC3261)
> NAT transverse: 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 using MD5/MD5-sess
> OpenVPN, IEEE802.1X
> IPv6