On my Eyebeam softphone using button, also using 3CX Call Assistant (don't like having to use another piece of software though), and blind via my ATA menu ( *98 ). Softphone solution best but I use more analog than softphone so a bit of a pain. 3CX has call pickup only implemented via key entry (*10* or 9100 default I think, I changed it) at this time, more options to come in the future release(s).