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Configuring Grandstream Devices with 3CX Phone System
Figure 6: Create a VPK on GXP2170
4. To configure a Key as BLF for instance to monitor another extension on 3CX Phone System, set
Mode to Busy Lamp Field (BLF).
Figure 7: BLF Key
5. In Accounts dropdown list, select the account to use with this VPK.
6. In Description field, enter a name to be displayed for this key.
7. In Value field, enter the extension SIP user ID to monitor.
8. Click on Save and Apply to submit changes.