Callcentric handles my [home] Numbers, and my [voicemail] Number. The home phone line is for my home obviously. If I am not home, then I won’t know of the phone call. As for the voicemail number, it is the number provided for my domain registrar information. The reason for this is SPAM management.
I also have a fax number. This fax line is relatively cheap, and while it doesn’t include any minutes, I almost never receive nor send faxes. With that said, I am just paying the cheapest rate, and keeping to that.