How to setup the BLF function in the VIP-2020PT?

Before we start, please be reminded your IPPBX must also support BLF function
In Function key / Ext. Key.
Type: please choose Memory Key
Value: your BLF extension
Line: choose which line you want to use for BLF function
Subtype: BLF
Pickup Number: choose your IPPBX pickup code + Extension number (in here we use *7 to make an example)