CRM VOIP Insurance

Manage some salesforces online. Everybody can become a free user with a status. When the status is validated by admin, the user has a list of people to call by voip. The list is managed by admin. Mail and skype prospection can be interesting. Each contact ask to user a result and a next step with date and [login to view URL] users will make their own appointments and some others can deliver their appointments a way admin is managing to others users. Status are predefined and associated to a level of power on changing, asking, and viewing the persons and their information on lower levels. Maximum 7 levels. If there is a sale, the user has to fill a form . Almost 3 types of forms. the calls can be issued only from the system (i don't know if the best solution is to issue from individual sip account or servers in our office, but i don't want the users to be able to issue a call to a person outside the system). Every contact has to get a result from user on a pre defined scenario (it's better if scenario can be defined by admin and speech too). A document can be upload for each result. Be able to record the calls can be [login to view URL] should be able to manage on which Voip company the users are issuing the calls in front of the type of calls (gsm or fixed line). Admin should be able to create as much site as he wants for a country and a language without any cost of developping. I want a maintenance period to be include