Polycom VVX 500 series - How do I cancel the transfer if the recipient doesnt want to or cant take a call?

End User Training Participant Guide
Polycom VVX 500 and 600 Series Phones
7
Answering Calls
How do I answer a call using the speakerphone?
Tap Answer or press the Speaker button.
Notes
If I am on a call, how do I answer a second call?
Tap Answer.
When you answer a second call, the first caller is automatically placed on
hold.