Create a Linux Based Dialler

We require a linux based Dialler, requirements are 1. Must be able to load unlimited amount of numbers on to the system - which can be separated by ranges. 2. Ability to make numerous simultaneous calls, can be defined with in the application. 3. Ability to randomise the length of calls, defined as we like. E.g. if we want all calls to be between 3 seconds and 20 seconds, all lengths completely randomly chosen by the application. 4. Ability to make a certain number of call within a predefined time. e.g. Defined that we want to make 3000 calls in one day, with 20% of calls made between 12am and 12pm, 20% of calls between 12pm and 7pm and 60% of calls between 7pm and 12am. 5. Must be able to make a call plan, which can be named and saved for future use, which would include all the information above. 6. We must be able to save numbers on the application, which once added can be used in numerous call plans.