VoIP users have an option of customizing their idle screens. Customization is not terribly difficult, but some qualification is necessary. The first requirement is a proper phone; My^D_LLURTH recommends and leases the Grandstream GXP 2000.

After hardware qualification, a qualified firmware¹ must be loaded. Most recent Grandstream firmware for GXP series phones allow custom idle screen download. Configure your phone for TFTP firmware upgrade via the Grandstream (168.75.215.189) server or other appropriate TFTP server. Instructions for upgrade settings are on page 21 of the attached GXP 2000 Users Manual. You will need to know the IP address and administrative password for the GXP 2000 user interface.

Firmware upgrade takes a significant amount of time (about 15 minutes … multiple reboots), and must not be interrupted; do not cycle power during the upgrade process. Enabled VoIP accounts may authenticate and be called during the procedure, but conversations should be avoided. Firmware loads may introduce undesirable behaviors² and should not be unnecessarily attempted.

NOTES :

1. If you need router function from your GXP series phone, do not upgrade to version 1.1.6.16 or later.
2. Read the GXP-2000 recent firmware notes; features, tweaks and bugs are extensively documented.