Then the selected Line or Memory key will work as Speed Dial.
To configure Speed Dial feature via Web Interface
Click Function keys → Line or Memory key.
Select the wanted Line or Memory key and set as Speed Dial.
Enter the desired phone number in the Value field.
Select the Account ID
Click the to save the configuration.
BLF
You can use the BLF (Busy Lamp Field) feature to monitor a specific one whether his phone is
busy or free.