In the current investment climate, it is apparent that NGN deployment cycles are going to be pushed out several years, which means the gateway approach is a viable means to 'sweat' additional Internet-related service revenues from the PSTN. While unit shipments of gateways will increase at a healthy rate over the forecast period, worldwide sales revenue is showing only modest growth as competition beats down prices and IMS-compliant gear begins to grab a foothold by simplifying interoperability requirements and thereby reducing the need for gateways.