I have always preferred email, as opposed to voice calls for the initial introduction, set up, etc. With the advent of texting, it seems that has gone by the wayside. All of my calls go to voicemail now.
I've spent way too much time with callers either jerking off while talking to me or just going in circles.
If the caller is interested & leaves a voicemail, I'll return the call (if he says that's ok), or just reply with a text saying "Sorry I just missed your call....."