I'd like to chime in on this conversation.
@Tech - unless I'm misunderstanding something (which is very possible ha), it seems like your proposed method is for how to send a caller you already have on the line to voicemail. I believe Debbie wants to know if there is a way to directly send a caller (that's not on the line yet) directly to voicemail, rather than answer the call and perform your method.
I'd like to know if this is possible. I already know how to transfer a caller that's already on the line to a voice mailbox. However, I don't know if there is a way when my phone is ringing, to push a button and send that caller directly to my voicemail rather than let it ring. We're using 5320 and 5330 IP phones. A couple users here have the 5360 phone with the touch screen display, and when they want to send a caller to voicemail, they simply push the button that appears on the screen "Send to Vmail".
I'm going to look and see if there is a feature code for something like that where you can add that function to a programmable key.