Yealink SIP-T4 Series - Directed Call Pickup; Call Transfer; Call Forward; Enabling Call Forward

You can configure a Monitor key to indicate the status of another VoIP account on the same
Virtual PBX. The status is indicated by the LED of the Monitor key as shown in the table below.
Note that Monitor keys also perform remote call pick-up and speed dial.
If you are prompted to log in to your phone:
Username = user
Password = user
Monitor Keys
Status of Monitored VoIP Account
Idle
Incoming call
On a call
LED Indicator
Solid green
Flashing red
Solid red
Result of Pressing Key
Speed dial
Remote call pick-up
Speed dial
User Access