The cisco high density packet voice digital signal processor module pvdm3 enables cisco 2900 and 3900 series integrated services routers generation 2 to provide rich media capabilities such as high density voice video connectivity conferencing transcoding transrating and secure voice in cisco unified communications solutions features investment protection and field upgradable capability the pvdm3 modules all have the same form factor and are used across cisco 2900 and 3900 series integrate