You'll be assigned a number that's not your cell/home number, and the prospects can leave you vmails. This is free.
Hope it helps,
Beachfront Realty, Inc.
With Google Voice, you can set it to ring through to any phone you want - or NEVER ring through, always playing an outgoing message you record and then recording the caller's response. An additional option is to receive an email or text msg with an automated transcription of the caller's message and Caller ID, so you always know when you've received a call.