Fortinet FortiVoice Gateways GS16 – IP-PBX – 16 FXS Ports – 2 x 10/100 The FortiVoice gateway solution provides ease of support for additional phone lines or analog extensions. The compact design and simple configuration makes growing your network a snap, and with the stackable design you can add as many gateways as you need now or later on as you grow. Gateways can be installed locally or remotely to provide scalable solutions for on-premise networks or centralized deployments.