Fortinet FortiVoice Enterprise 100E – IP-PBX – 4 x 10/100/1000 The FortiVoice Enterprise IP PBX voice solutions give you total call control and sophisticated communication features for excellent customer service and efficient employee collaboration. Powerful, affordable and simple, FortiVoice Enterprise systems deliver powerful features and value to offices with up to 3,000 phone users. FortiVoice phone systems include everything you need to handle calls professionally, control communication costs and stay connected everywhere.