Grandstream GXP2120 Datasheet
Grandstream GXP2120 IP Phone
Product Name: Grandstream GXP2120 IP Phone
Manufacturer: Model Number: GXP2120
Please note: the Grandstream GXP2120 has been discontinued. For an alternative we
recommend the Grandstream GXP2160 Enterprise VoIP Phone
The Grandstream GXP2120 is a next generation enterprise grade VoIP phone that features 6
lines, 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.
Grandstream GXP2120 IP Phone Key Features
� Generous 320 x 160 pixel backlit graphical LCD display with up to 8 level grayscale
� 6 dual-color line keys (with 6 SIP accounts), 4 XML programmable context-sensitive soft
keys, up to 5-way conferencing and up to 13 call appearances with 7 dual-color BLF extension
keys
� HD wideband audio, superb full duplex handsfree speakerphone with advanced acoustic
echo cancellation and excellent doubletalk performance
� Large phonebook (up to 2000 contacts) and call history (up to 2000 records)
� Automated personal information service (e.g. local weather, stock, currencies, RSS, news
etc.) personalized music ring tone/ring back tone/music-on-hold, flexible customizable screen
content & format using XML and advanced Web and enterprise applications integration
� Dual switched auto sensing 10/100Mbps network ports with integrated PoE
� Automated provisioning using TR-069 or encrypted XML configuration file, SRTP and TLS for
advanced security protection, 802.1x for media access control
Created on: Tuesday 27 April, 2021
Note: Please refer to the Grandstream IP Phone Detailed Comparison Table for more information.
Grandstream GXP2120 VoIP Phone Technical Specifications
Protocols and Standards
� SIP RFC3261
� TCP/UDP/IP
� RTP/RTCP
� HTTP/HTTPS
� ARP/RARP
� ICMP
� DNS (A record, SRV, NAPTR)
� DHCP
� PPPoE
� TELNET
� TFTP
� NTP
� STUN
� SIMPLE
� TR-069
� 802.1x
� IPV6
Network Interfaces
� Dual switched 10/100Mbps ports with integrated PoE
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Grandstream GXP2120 IP Phone
Graphic Display
� Back-lit 320 x 160 pixels graphical LCD display with 8-level greyscale
Key Features
� 6 line keys with dual-color LED and 6 independent SIP accounts
� 7 programmable BLF extensions keys with dual-color LED
� 4 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/Contacts and Message (with LED
indicator)
Voice Codec
� Support for G.723.1, G.729A/B, G.711 u/a-law, G.726, G.722 (wide-band) and iLBC, in-band
and out-of-band DTMF (in audio, RFC2833, SIP INFO)
Created on: Tuesday 27 April, 2021
Telephony Features
� Hold
� Transfer
� Forward
� 5-way conference
� Call Park
� Pickup
� Shared-Call-Appearance (SCA) / Bridged-Line-Appearance (BLA)
� Busy-Lamp-Field (BLF)
� Downloadable Phone Book (XML, LDAP, up to 2000 items)
� XML Customization of Screen
� Call Waiting
� Call Log (up to 2000 records)
� Off-hook Auto Dial
� Auto Answer
� Click-To-Dial
� Fexible Dial Plan
� Hot Desking
� Downloadable Ringtones
� Music-on-Hold
� Server Redundancy
� Fail-over Support
HD Audio
� Yes, both on handset and speakerphone
Headset Jack
� Both RJ11 and 2.5mm jacks
Base Stand
� Yes, allows 2 angle positions
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