Grandstream Networks GXP2135

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BLF Configuration User Guide
3. Go down to the “Multi-Purpose Keys” or “Virtual Multi-Purpose keys” section of the page. Click on the
dropdown menu of the key being set up. Scroll down and click on “Busy Lamp Field (BLF)”.
Figure 2: Configure Busy Lamp Field Key
4. On the “Account” dropdown menu, select the account associated with the IP PBX that carries the
extension being set up.