Listening Voip Answerphone

This project a piece of another project, there are some sound record on server, o voip user can login a website with its voip number and password, then there is a user interface to how his voice records, if there is new one , sytem warn user. this project include two part, one of them is server side, server use tcp, rtsp,rts protochol, other part is web side, i prefer asp.net website, there will be login page, after login, there are a page includes sound record of user include their detail. user can listen this record on website with media-player plug-in, then user can delete this record, this project idea is basic answerphone..