At the main headend, all signals to be transported are digitized and concentrated in an IP in - IP out Multiplexer for the assembly of Transport Streams (TSs). FEC (Forward Error Correction) is often added at this point, mainly when there are long distances or when there is no control over the transit network.

The Transit Network can be owned by the operator or contracted from a carrier.
 

Once the IP signals reach the Remote Headends, multiple architectures can be implemented for subsequent distribution to subscribers, including digital, analog, or mixed solutions. The decision will depend on various factors and boundary conditions in each case, such as the number of subscribers, the type of distribution network, the value-added services to include (Commercial Packs, EPG, User Control, etc.), and others.