Bpdu guard

Hello i'm learning about bpdu. Can anyone help me out with these questions? I have a switchport with voice VLAN and untagged data VLAN and with bpdu guard enabled on it.

1 if i connect an unmanaged switch Will it deploy the bpdu guard imediatelly or do i have to connect One or more machines to that unmanaged switch for the bpdu guard to be deploid? Or will it not deploy bpdu guard at all? 2 if the bpdu guard is deploid, Will it shutdown the switchport (no link activity at all) or Will it simply block/discard traffic, keeping the link up? 3 if the unmanaged switch does block the switchport, and since i have voice VLAN and untagged data VLAN configured on that port, if i put the unmanaged switch behind and IP phone Will it still deploy bpdu guard?

Thanks in advance for all the help i can get, since the b**S at work won't help me out with these doubts. Well it's a cruel world. Seems at work everything GOES, to f up the partner. Regards