Real Time Transport Protocol as defined by the IETF is fully implemented in the IP Caster to provide end-to-end network transport functions suitable for transmitting real time video and audio over multicast or unicast network services. Functions such as payload type identification, sequence numbering, time stamping, and delivery monitoring are necessary to make it work and are fully implemented in the IP Caster to transport your DVB content reliably since multiple, distinct RTP sessions may be used in the available network simultaneously. RTP is the only "standard" protocol designed to carry such high priority bitstreams across a public internet network often referred to as a WAN. We have worked long and hard to fully implement and test this key protocol for the IP Caster..