Asterisk/Trixbox Task (Bundle-1)(repost)

This is? a small trixbox task that we'd like to have someone implement very professionally. There are online resources and forums that provide enough? guidance to implement all this. The FreePBX interface is already there and the candidate can easily set it up. We have a trixbox in place. Here is what we'd like to setup, 1. **DISA** : A caller calling from a particular ID or a group should be directed to DISA, where he would get the dial tone from the SIP Proxy. Not every call should go to DISA. Only the users we want from specific caller IDs. 2. **Fax to Email** : Customer receives the fax in the form of an email to the specified address. 3. **RingTones** : Customers should be able to set different ring tunes from a give list so that if someone calls them, the caller should hear a ringtune/music rather than the standard ring. This is also applicable for MOH (Music on Hold)