Hi, I can develop this system for you, i will develop the software for calling system, we can design it using C# if it is for desktop and use a GSM small hardware for offline calling and can use skype for online calling, we will print out the numbers with no answer but we can also use the same software to dial the no answer number from different number, we can develop this software in small time so that you can get on with your task soon, We have developed CRM systems which require these features with inventory and clients management.