Basic functions
132 * 58 graphic character dot matrix with backlight LCD
2 SIP accounts
Call Forward, Call Transfer, Call Waiting, Hotline, Call Hold,
Auto Answer, Caller ID, Redial, Mute, DND
Local 3-Way Conferencing, Speed Dial, Voice Mail
Phone Book (400)
Direct IP call without SIP proxy
Black list(100)
Dialed/received/missed/Forward call (total 400)
Call Center Headsets mode

IP PBX features
Intercom, Paging, Call pickup, Call park
Anonymous call, Anonymous call rejection
Hold on music, Conference Call
Group Listening, Group pickup
DND&Call forward state synchronization
Call Recording

Advanced features
LDAP
Microsoft active directory server
XML remote phonebook
TR069
Action URL

Audio Features
8 own ring tone, 2 custom ring tone article
8 volume adjustable + Mute mode
Narrowband codec: G.711(A/μ), G.729A/B/AB, G.726, iLBC
Wideband codec: G.722, L16
Support VAD, CNG, AEC, PLC, AJB, AGC
Full-duplex speakerphone with AEC

Network features
LAN / PC: support bridging mode
Span to PC
Openvpn
IPv4&IPv6
SIP connection mode: Proxy mode, and P2P mode
Support DNS SRV (RFC3263)
NAT transverse: STUN mode
DTMF: In-band, RFC2833, SIP INFO
Support QoS
HTTP / HTTPS web server
Package tracing export
System log

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Physical characteristics
Power Interface: DC 5V-1A
POE power supply: IEEE 802.3af Class 2 (only A21)
2 RJ45 10/100M adaptive Ethernet ports
1 RJ9 headphone jack, 1 RJ9 handset jack
1 status indicator, 3 soft keys, 5 navigation keys
2 line keys, 2 volume keys
7 function keys (menu, cancel, voicemail, mute,
headphone, Redial, hands-free)
Wall mountable

WiFi feature (only models A20W)
Support IEEE 802.11b/g/n
Enhanced support for IEEE 802.11e QoS
 IEEE802.11i (WPA, WPA2)

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Use of the environment
Operating temperature: -10 ~ 50°C
Operating humidity: 10 ~ 90%

SafetySupport
VLAN, LLDP, IEEE802.1X
Support TLS
Support HTTPS
SRTP (RFC3711)
Digest authentication using MD5/MD5-sess
AES encryption for configuration file
Support phone lock, the administrator / user level access control

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Package
Qty/CTN: 10 pieces
G.W/CTN: 11KG
Giftbox size:  280mm*210mm*78mm
Carton Meas: 425mm *415mm *300mm

Configuration
PnP configuration: based on the server implementation
Redirection and Provisioning Service(RPS)
Manual configuration:Web, Keypad
Batch deployment: HTTP/FTP/TFTP/RPS/DHCP Option 66

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Certifications
CE: EN60950 FCC: Part15