Call centre software

I require a MySQL database for a outgoing call centre. The database fields will be created to make things a bit easier. Then I require php scripts to perform the following tasks. User login system 20 operators so I don't want each operator to get the same database entry at the same time. So I need a record to show up when operator is ready to dial, field with name phone etc needs to be editable There will also be a Response table to record clients response There will also be a appointment setting table if the operator is successful Need the phone number field to be clickable and dialed via internal modem Contact me for any questions