Grandstream Networks GXP21 Series

The users could also edit and add VPK from LCD.
1. To edit (fixed) VPK, press and hold the line key for about 4 seconds, a configuration window will pop up for the user to
configure.
2. To add (dynamic) VPK, press and hold the RIGHT arrow key for about 4 seconds, a configuration window will pop up for
the user to configure.
Up to 20 modes can be supported on fixed VPK and up to 17 modes can be supported on dynamic VPK. Each mode is
indicated by a different icon on the LCD and the icon will be different when in different status.
Please find the icon indications below for different mode of VPK.
VPK Mode State Icon
LED
Status
LINE
Unregistered
(No IM, Voice mail, No Call
Forward)
OFF
Registered + Idle
(No IM, Voice mail, No Call Forward)
OFF
Unregistered + IM + Voice mail OFF
Registered + IM + Voice mail OFF
Unregistered + IM (No Voice mail) OFF
Registered + IM (No Voice mail) OFF
Unregistered + Voice Mail (No IM) OFF
Registered + Voice Mail (No IM) OFF
Unregistered + Call Forward All
(No IM, No Voice Mail)
OFF
Registered + Call Forward All
(No IM, No Voice Mail)
OFF
Unregistered + Call Forward Delay + Call
Forward Busy
(No IM, No Voice Mail)
OFF
Registered + Call Forward Delay + Call Forward
Busy
(No IM, No Voice Mail)
OFF
Unregistered + Call Forward Delay
(No IM, No Voice Mail, No Call Forward Busy)
OFF
Starting from firmware version 1.0.11.71, the Voicemail VPK can display a corresponding description.