I need to build a voip applicaiton, which basically allows a users to dial into a certain business and for the business to receive and view the customers details when they call in.
As i am new in to sip and these types of applications. I am hoping someone could give me an outline as to how to go about it. Thus far I know I need to register sip clients and then interact with them ... but do I need a pbx or can I go via sip domain provider. Where do I setup all the users who will interact with each other? Are there any free domain servers that I can test on .... I need to test an actuall call. If necessary I would subscribe to the necessay providers