HD voice: HD handset

Codec: G.711A/u, G.7231 high/low, G.729AB, G.722, G.726-32

DTMF: In-band, RFC 2833 and SIP INFO

Full duplex hands- free speaker phone with acoustic echo cancellation

Voice Activity Detection (VAD)

Comfort Noise Generation (CNG)

Background noise suppression

Adaptive jitter buffers

Packet loss concealment

SRTP

Different country tones

Mute

★★Advanced Features★★

Call forwarding (busy/ no answer/ always)

Call transfer ( unattended/ attended/ semi-attended )

Call holding

Call waiting

3 way call conference

Capable of 10 way conversation

BLF list

Join call

Call pickup /Call back /Call Completion

Call park

Last Number Redial / Auto Redial

Hot desking

Predial

SIP messaging , MWI

Flexible dial plan

Barring function for outgoing calls

Do not disturb

Auto answer

Caller ID display

CLIR(rejects anonymous calls)

CLIP(to make an anonymous call)

Dial without registration

Call logs with missed calls/ incoming calls/ outgoing calls. Each support 300 records

Phonebook 500 records

Speed Dial (abbreviated dialling) • Hotline/Warm-line

Call rejection

Black List/ White List

Intercom/Intercom barge

Password dial, DTMF hidden

Action URL/ active URI

Voice codec setting for each SIP line

Multicast

LDAP, XML phonebook

Web dial

Keypad lock, Emergency call

Network/ Security Features

WAN / LAN:10/100M Ethernet ports,

Bridge mode and route

PPPoE for xDSL

802.3af POE

VLAN(Voice VLAN/Data VLAN)

802.1X

NAT (NAPT)

NAT transverse :Support STUN client

DHCP client on WAN/ DHCP server on LAN

Main DNS and secondary DNS server

DNS Relay

SNTP Client

Firewall and DMZ

Web management access restricted

VPN(L2TP/Open VPN)

ping, tracert, telnet

Maintenance & Management

WEB, telnet and LCD menu management

Management with different account right

Recover firmware and factoryreset through POST mode

Upgrade firmware via HTTP, HTTPS, FTP, TFTP

DHCP option66 and cu