High cost effective 4 lines IP phone
Simple style , eazy to use , rich function , clear voice , stable performance

Dual core CPU is the guarantee of high quality IP phone

One core for instruction process and the other core for voice
decoding greatly improve the sound quality and make it possible 
to run more complicated applications fluently.

128*64 pixel LCD

Compatible with major IP PBX platforms

Easy to install


Phone functions

Phone functions:
3 ways to make or receive call – handset/headset/hand-free speaker;
Support caller ID , auto answer , DND and call reject;
Support speed dial , redial , mute and call holding;
Support point to point calls via IP address and SIP URL;
Support 3 ways conference call;
Support call transfer( blinded transfer , attendant transfer and semi-attendant transfer);
Support call forward ( always forward , busy forward or no answer forward);
Support hotline and flexible dial plan configuration;
IP PBX function:
Anonymous Call, Anonymous Call Rejection;
Synchronization Message Waiting Indicator (MWI);
Voicemail , call recording;
Call on hold , call pick up;
Paging and intercom;

Hardware Specification

2*263MHZ dual core MIPS processor;
3.2 inch 128*64 Pixel LCD;
41 keys including 13 programmable keys;
Dual RJ45 10.100Mhz Ports;
2 RJ9 ports ( for handset and headset);
1 RJ45 port for extension modules;
Power adapter AC 90-240V , DC 12V; Standby power consumption <1W , working power consumption 2.5W;
Support PoE ( power over eternet)T840P;
Working temperature : -10 ℃– 50 ℃;
Working humid : 10%-95% ;

Network features

Support SIP V1(RFC2543), V2(RFC3261);
Support backup server;
Support proxy server and point to point connection;
Support IP/DHCP/PPPoE dial;
Support FTP/DHCP/PPPoE client;
Support Telnet/HTTP/HTTPS service;
Support SNTP protocol;
Support DNS SRV(RFC3263;
Support DNS client and buil-in NAT/DHCP service;
Support STUN;
Support 3 DTMF ways,RFC2833 and SIP INFO;
Support router and bride mode;
Logout on web GUI;

Software features

UI and WEB Support multiple language;
User friendly UI and WEB design;
Configuration wizard for first time use;
Support 200 contacts in phone book and 200 call history record;
Support dial assistant , match the number in smart ways;
Support black list;
Auto adjusted background light ;
Adjustable level of background light brigntness;

Voice feature

Support HD voice codec L16G and G.722;
Support G.711a/u,G.726,G.729a/b,G.723,iLBC codes;
Support VAD(Voice Activity Detector) and CNG(conformation noise gain);
Support AJB ( auto Jit buffer) , AEC ( voice echo canceller) AGC ( voice gain control);
10 broadband rings and 2 customized rights by users;


Support 3 ways to manage the phones : Web GUI , phone keyboard and auto configuration in FTP/TFTP/HTTP/HTTPS/PnP;
Configuration wizard on web UI;
Support SNMP;


Support VLAN;
Support L2TP VPN;
Support 802.1X;
Support 2 different access levels- admin and user;
Support SRTP and HTTPS protocol ( client/server);


Dimension of single unit (23.8 x 11.8 x 18.5);
Weight :1.3KG;
Packing size (32.6x 22.0 x 7.6)cm;
Preserve temperature -40 - -70℃;
Preserve humid level: 10-95%;



AT840 Models PoE


Firmware User manual Brochure Datasheet Quick installation guide Cautions