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Originally Posted by B.B. Suggestion - is it possible for each phone number / machine to be individual? meaning - each subscriber has a pincode. ALL calls are blocked except the calls that dial the pincode first/last. The user gives this code to anybody they wish so that they only receive calls from people they know. |
It's certainly possible, even with today's technology. A minimal Asterisk system, for example, can do all this and more, and will have the following costs:
Base Hardware: PC-based, and probably free, for a minimal system. People throw out more powerful computers every day. If not free, than maybe $5-$10.
Phone connection card or other hardware: Varies, but a single-phone-line card shouldn't cost more than a couple of dollars second-hand.
Software, OS: Linux, free.
Software, Asterisk: free.
Set the phone up as an office extension and use Asterisk as a PABX with its "If you know the extension you want, please dial it now" functions enabled.
PS - If anyone wants to try this and isn't sure about the building/installing process, ask one of the local computer clubs to do it for you as a project. Labor costs: pizza and beer/soft drink.
Update: Responding to JodieR's post - It shouldn't be too hard to record an IVR message saying something like "Please be advised that this number is on the national Do Not Call registry. If you are calling to speak to X, please dial 1234 to leave a message after the beep."