Block Calls from unknown source

Hi Im looking for a software or script we are a phone service provider in my city I have more then 10000 phone user, they keep getting anonymous calls from abroad phone recorder selling product or survey is there any way to stop them or any code to stop the calls or block the source, every time the source is different. Lowest bid welcome only

Skills: C Programming, Perl, PHP, Software Architecture

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About the Employer:
( 0 reviews ) Shimla, India

Project ID: #2584942

3 freelancers are bidding on average $600 for this job


We have completed hundred of VoIP project for over 100 companies worldwide. Please send us more details about your VoIP platform.

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