Shared Extension is when a group of agents has one and the same extension line. During the incoming call the phone will ring at several agents simultaneously.
Mirrored Extensions is when you have one and the same extension line on several phones, in example, in the office, at home and on the cell phone. So when someone calls your extension all you phone sets sharing the same extension will ring.
Inter2fone has it Headquarters in Miami, FL USA and has regional offices in Equator (Southamerica), and Switzerland (Europe). Was inittialy formed like a division of FIX GROUP to attend VoIP services for the Latinamerican Market.