Bulk SMS Portal

I require a SMS web portal I can use as a front-end to my SMS servers (SMPP/HTTP API). This portal shall be used by registered users to send SMSs via the following interfaces: Email to SMS HTTP API to SMS SMS via SMPP Registered users - after being verified by the admin user - shall be able to do the following: - Create/update phone-book (shall have the ability to create group-profiles to associate numbers for bulk operations) - Send SMS via above mentioned interfaces to a single number or in bulk - View account activities (last loin, actions performed, list of SMSs sent, and balance) - Update account profile (name, address, etc) IMPORTANT: Number of SMSs sent shall be deducted from the user's balance (basic billing function) Admin user shall be able to do the following: Create registers users manually Activate/deactivate accounts View aggregate billing information Configure accounts (set SMS routing) This is not an extensive list and I welcome suggested features that you think are standard in such websites. I would like the site to be simple, attractive and easy to use. One site I came across that I think could be used as a reference is [login to view URL] I would like the work to be done using Drupal/PHP/AJAX/JAVASCRIPT/MYSQL. Integrating the website with the SMS servers will be done by myself.