International Call Blocking
This function blocks all telephone calls going out of the country, thus, insuring in a case of undesirable international calls.
Main portion of the advantages of the Asterisk server appears from it being an open source downloadable product. Most of the users, especially business people, can find it difficult to understand the idea behind this principle, or free software, but a business models behind open source are different and specific, as in case with Asterisk server.
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