Grandstream Networks GXP1620 - Firmware Upgrade and Provisioning Settings

GXP1620/1625/1628 BLF Configuration Guide
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5. In the “Description” field, type the name of the individual or department that you want to associate with
the extension being set up.
Figure 4: Add Description on Line Keys
6. In the “Value” field, type the extension number for the extension being set up.