The FortiVoice IP-PBX voice solutions are built for offices with up to 3000 phone users. FortiVoice systems give you total call control and sophisticated communication features for excellent customer service and efficient employee collaboration. Powerful, affordable and simple, FortiVoice phone systems include everything you need to handle calls professionally, control communication costs and stay connected everywhere. FVE-20E2 is suitable for up to 20 users and supports 2 telephone lines (FXO), 2 analog extensions (FXS) and 8 concurrent calls.