Grandstream GXW4104 IP Analog Gateway, voice and video, 4 FXO VoIP, BUNDLE of 2 The GXW4104 FXO gateway enables businesses of all sizes to create an easy-to-deploy VoIP solution. These FXO gateways offer the ability to seamlessly connect multiple locations and all devices within an office to any hosted or on premise IP PBX network to make deployments as easy as possible. The GXW4104 includes 4 FXO ports, 2 10/100 Mbps ports and supports SIP video through the H.264 codec. Advanced telephony features, easy automated provisioning and superb voice quality allow the GXW410x series to be the ideal VoIP gateway for businesses. Advanced security protection with SRTP