[cisco-voip] Answering the 7970 - handset vs softkey

[Bob A. Bowie]

Could someone help me understand why the 7970 sometimes will not answer a 
call when you lift the handset, you have to hit the answer softkey that 
appears.  How does the phone choose which method to usse, it seems  random 
to me.
Is there a way to force it to use the handset no matter what?

Thanks