Voicemail Hotline?

I am looking to create a hotline that allows users to access it be entering a code number and leaving a voicemail. Once the voicemail is created it can be accessed by a mysql sever and retrieve the voicemail wav. file. Please let me know how feasible this is and how i can start this process.
Thank you.

I have done similar projects if you want, you can contact me for pay assistance

ambiorixg12@gmail.com

you can implement an IVR with simple voicemail .
I suggest you to learn AGI Programming . with AGI it is very easy to implement such solutions .