How do I make a call with my Yealink phones?

MAKING A CALL
From the Handset:
1. Pick up the handset, enter the phone number and press the Send soft key.
Using the Speakerphone:
1. With the handset on-hook, press the speakerphone softkey.
2. Enter the number and press the Send soft key.
From the Headset:
1. With the headset connected, press to activate the headset mode, enter the number and press the Send soft key.