Grandstream GXP2120

Grandstream GXP2120 HD Enterprise 4-line PoE IP Phone


The Grandstream GXP2120 IP Phone is a next generation enterprise grade IP phone that features 6 lines, a generous 320 x 160 backlit graphical LCD, 4 XML programmable context-sensitive soft keys, 7 XML programmable BLF extension keys, dual network ports with integrated PoE and 5-way conferencing.

The Grandstream GXP2120 IP Phone delivers superior HD audio quality, rich and leading edge telephony features, personalized information and customizable application service, automated provisioning for easy deployment, advanced security protection for privacy and broad interoperability with most 3rd party SIP devices and leading SIP/NGN/IMS platforms.

It is a perfect choice for enterprise users looking for a high quality, feature rich multi-line executive IP phone with advanced functionalities and performance.

Feature Highlights

  • Large 240x120 pixel backlit graphical LCD display with up to 8 level grayscale
  • Dual switched auto-sensing 10/100Mbps network ports with integrated PoE
  • Large phonebook (up to 2,000 contacts) and call history (up to 2,000 records)
  • 4 dual-colour line keys (with 4 SIP accounts), up to 5-way conference (max 4 concurrent calls), BLF (Busy Lamp Field) extension keys
  • 3 XML programmable context-sensitive soft keys, a desktop stand to allow 2-angle positions
  • HD Wideband audio, superb full-duplex hands-free speakerphone with advanced acoustic echo cancellation and excellent double-talk performance
  • Automated personal information service (e.g., local weather, stock, currencies, RSS news, etc), personalised music ring tone/music ring back tone/music -on-hold using Internet music streaming or local music files, flexible customisable screen content & format using XML, and advanced Web and enterprise applications integration (pending)
  • RJ9 and 2.5mm jacks for professional and casual use


  • SIP RFC3261
  • ICMP
  • DNS (A record, SRV, NAPTR,)
  • DHCP
  • PPPoE
  • TFTP
  • NTP
  • STUN
  • TR-069
  • 802.1x
  • IPV6 (pending)

Feature Keys

  • 4 line keys with dual-colour LED and 4 independent SIP accounts
  • 18 programmable BLF extension keys with dual-colour LED
  • 3 XML programmable context sensitive soft keys
  • 5 navigation/menu/volume keys, 11 dedicated function keys for:
    • Hold
    • Speakerphone
    • Send/Redial
    • Transfer
    • Conference
    • Mute
    • Headset
    • Intercom/Paging
    • Do-Not-Disturb
    • Phonebook
    • Message (With Led Indicator)

Voice Codec

  • Support for:
    • G.723.1
    • G.729A/B
    • G.711u/a law
    • G.726
    • G.722 (wide-band)
    • iLBC, in-band and out-of-band DTMF (in audio, RFC2833, SIP INFO)

Telephony Features

  • Hold, transfer, forward,
  • 5-way conference, busy-lamp-field (BLF),
  • Call park, pickup, shared-call-appearence (SCA)/bridged-line-appearence (BLA),
  • Downloadable phone book (XML, LDAP, up to 2,000 items),
  • Call waiting, call log (up to 2,000 records), XML customisation of screen,
  • Off-hook auto dial, auto Answer, click-to-dial, flexible dial plan,
  • Host desking, personalised music ringtones and music on hold,
  • server redundancy and fail-over



  • Layer 2 (802.1Q, 801.2p)
  • Layer 3 (ToS, DiffServ, MPLS) QoS


  • User and administrator level passwords
  • MD5 and MD5-sess based authentication
  • AES based secure configuration file
  • SRTP
  • TLS
  • 802.1x media access control


  • English
  • German
  • Italian
  • French
  • Spanish
  • Chinese
  • Korean
  • Japanese


  • Firmware upgrade via TFTP/HTTP/HTTPS
  • Mass provisioning using TR-069 or encrypted XML configuration file

Power & Green Energy Efficiency

  • Universal power adapter included: Input: 100-240VAC 50-60Hz; Output: +5VDC, 800mA)
  • Integrated Power-over-Ethernet (802.3af)
  • Max power consumption 2.5W (power adapter) or 3W (PoE)


Dimensions: 252mm (W) x 210mm (L) x 78mm (H)
Unit weight: 1.08KG; Package weight: 1.78KG

Temperature and Humidity

  • 32-104 Degrees Farenheit/0-40 Degrees Celcius
  • 10-90% (non-condensing)

Package Content

  • GXP2110 phone
  • handset with cord
  • base stand
  • universal power supply
  • network cable
  • Quick Start Guide


  • FCC Part 15 (CFR 47) Class B
  • EN55022 Class B
  • EN55024
  • EN61000-3-2
  • EN61000-3-3
  • EN 60950-1
  • AS/NZS CISPR 22 Class B
  • RoHS; UL 60950 (power adapter)

Where to Buy

Created by: voip_phones, Last modification: Fri 12 of Apr, 2013 (09:55 UTC) by VoIPon
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