Best way to control access to international numbers

[Vietyank (Dennis Gray)]

Howto block Offshore/premium-rate numbers

I’ve had so many friends and customers get stung by this, I thought I would put out a quick howto for blocking U.S. offshore and premium rate numbers numbers in FreePBX. Overview There are expensive phone desitnations that can be dialed directly with what looks like a normal US interstate phone number; 1-XXX-XXX-XXXX. Here I will describe how to specifically block certain area codes while still allowing other North American direct dialed destinations in the FreePBX dialplan. The Problem You …