Grandstream Networks, Inc. GXP21xx User Manual Page 13 of 41
Firmware version: 1.0.1.66 Last Updated: 05/2011
MUTE
Mute an active call
HEADSET
Press HEADSET key to answer/hang up phone calls while using headset. It
also allows user to toggle between headset and speaker
DND
Enable/Disable DND. (Not applicable on GXP2100)
INTERCOM
Press to use intercom if intercom user ID is configured in web GUI
MENU
Press to enter menu when phone is in idle. Use it as ENTER key in keypad
configuration
Enter to retrieve voice mails or other messages
Brings phonebook on screen
Enable/Disable hands-free speaker
Enable/Disable handset mode ; or used as SEND/REDIAL
-Navigation keys “Up” “Down” “Left” “Right”. Press to navigate in menu
options
-During the call, press “Up” “Down” to adjust volume
-When the phone is idle, press “Up” to view missed call; press “Down” to view
phonebook
0 – 9, *, # Standard phone keypad; press # key to send call; press * key to for IVR
functions
Multi Purpose Keys 18 MPKs in GXP2110 and 7 MPKs in GXP2120 used for BLF, Speed dial
and etc
MAKING PHONE CALLS

Handset, Speakerphone and Headset Mode

The GXP21xx allows yo u to make phone calls via handset, speakerphone, or headset m ode. During the
active calls the user can switch between the handset and the speaker by pressing the speak er key. For
headsets to operate, the user must plug the headset to an RJ 9 or 2.5mm port on the phone, which allows the
user to pick-up, speak, or hang-up calls.

Multiple SIP Accounts and Lines

GXP2120 can support up to 6 independent SIP accounts; GXP2110/GXP21 00 can support up to 4
independent SIP accounts. Each account is capable of independent SI P server, user and NAT settings. Each
of the line buttons is “virtually” mapped to an individual SIP account . The name of each account is
conveniently printed next to its corresponding button. In off-hook state, select an idle line and the name of
the account (as configured in the web interface) is displayed on the LCD and a dial tone is heard.