Simple Voicemail

Simple Voicemail is a simple voicemail module for Drupal designed for people who
would like a second phone number that functions as a voicemail box. Use cases
envisioned are a small business that has no fixed line but uses mobile phones,
throwaway numbers for Craigslist ads, or community organizations that want a
voice number backed by nothing but a mailbox.

Can optionally try forwarding a call to another number before the voicemail answers.

Messages are transcribed and emailed as a WAV file with transcription to you.
Tropo is used to provide the phone and transcription services and you'll need to sign up with Tropo to use this.

Requires Mimemail and Mail System modules.