Possible to do blind transfer with transfer button?

[jfields]

During a call, I push a blf key and it immediately does a blind transfer. That is good.

If, however, I push the "Transfer" button on the phone and then dial the 3-digit extension, it does an attended (or semi-attended) transfer, not a blind transfer. How can I make it do a blind transfer for that (WITHOUT pushing the transfer button again after dialing the extension)? I ask because once you type in the extension, you have to wait for it to start ringing before you hang up. If you don't want for it to start ringing before you hang up, it doesn't complete the transfer and it puts the call on hold.

Pushing the transfer button twice (once before the extension and then again once after the extension) obviously works, but it is not ideal.

When you push transfer and then dial the extension, I want it to immediately do a blind transfer. Is there somewhere I can change the behavior of the transfer button?