Hello @DarioV
Regarding your inquiry, the *20 Call Park / Pickup feature is not available on the Free / SMB version.
It is only available with Commercial licenses.
Hello @DarioV
Yes, there is another way to achieve this from the phone itself without using the dial codes. On the Yealink T53W, you can assign a BLF key to send a call to, or pick up a call from, a shared parking slot.
You can configure this in the Admin Console:
Admin Console > Users > [Your User] > BLF tab
Please note that in the free edition, each company has 2 shared parking slots available.