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Atcom D21 Entry level business IP Phone

Entry-level high quality business IP Phone

Atcom all new D Series IP Phones, minimalist modern design and light weight.  D21 is a dual 100Mbps POE Ethernet port IP phone with 6 SIP accounts, 2 linekeys, and full-view backlit grayscale display. It is a cost-effective IP phone specially designed for office staff and Hotel Gust rooms.Its innovative multi-scene key mode, which can be used to expand up to 12 visible DSS keys, definitely improves the office productivity. It adds user-friendly help information to the LCD, whichcan reduce the user’s learning costs.






6 SIP accounts,L1 and L2 line support monochrome LED light
128*64 graphic lattice LCD
Multi-scene switch key
Navigation key
LED Phone status indicator














HD full range telephone receiver
High-power loudspeaker
Anti-interference microphone(handset and speakerphone)
Closed microphone cavity



















Enter the guide interface. First: press the Menu Key












Second: Enter the main menu interface,and press the second soft key













Last: Enter the guide interface and check the different guide setup













D series new feature, add multi-scene key, enter the different multi-scene user mode, the most can switch 4 times and add 12 BLF programmable keys. First: press the multi-scene key














Second: Enter the other softkey user mode


Basic functions

128*64 graphic character dot matrix with full view of backlight LCD, 6 SIP accounts, Call Forward, Call Transfer, Call Waiting, Hotline, Call Hold, Auto Answer, Redial, Mute, DND, Local 3-Way Conferencing, Speed Dial, Voice Mail, Local Phonebook (up to 1000 ), Direct IP call without SIP proxy, Black list, Dialed/Received/Missed/Forwarded call (400 total), Call Center Headsets mode
Quick to use features

Multi-scene feature, Guide user document, 13 programmable keys, One key to arrive menu, One key to read the phone information, Intelligent search for phonebook, Dial assistant
IP PBX Features

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

English, German, Italian, French, Spanish, Portuguese, Russian, Simplified or Traditional Chinese, Polish, Turkish, Hebrew
Advanced Features

LDAP, XML remote phonebook, Action URL, Active URI, CSTA, Multicast paging
Audio Features

5 ringtons (system ringtone or custom ringtone) article, 8 volume adjustable & Mute mode, Narrowband codec: G.711(a/μ), G.729A/B/AB, G.726, iLBC, OPUS, Wideband codec: G.722, L16, Support VAD, CNG, AEC, PLC, AJB, AGC, Full-duplex speakerphone with AEC
Network Features

IPv4&IPv6, VlAN, LLDP, CDP, OpenVPN, IEEE 802.1X, STUN NAT Traversal, RPORT. Support Qos(IEEE802.1Q/p VLAN tagging) and layer 3 QoS(ToS,DiffServ,MPLS). SIP connection mode: Proxy mode, Peer to Peer. Support DNS SRV (RFC3263). DTMF: In-band, RFC2833, SIP INFO. HTTP/HTTPS web server. LAN/PC: support bridge mode, Support auto negotiation, Package tracing via PC port. Package tracing export by web. Support DHCP Option12 host name and Option 60 Vendor Class ID. Support

TLS, HTTPS, SRTP (RFC3711), Digest authentication using MD5/MD5-sess, AES encryption for configuration files, Phone lock, The administrator/user level access control

Configurable through web interface/phone
Batch deployment

Service (RPS), TR069(Supported by special firmware), Import/Export CFG file via web, FTP/TFTP/HTTP/HTTPS, DHCP Option 66 or custom Option 128~254, PnP, Redirection Provisioning Generate multiple configuration files via tool, Periodic check and update

Power Interface: DC 5V-1A, PoE power supply: IEEE 802.3af Class 2 (D21) 2x RJ45 10/100M adaptive Ethernet ports, 1x RJ9 headphone jack, 1x RJ9 handset jack

CE:EN62368、EN55032、 EN61000-3-2、EN61000-3-3、EN55035 FCC: Part15B

PBX Compatibility


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