scope:

The present document is the baseline specification for the provision of interaction channel for Local Multi-point Distribution Systems (LMDS) networks. It is not intended to specify a return channel solution associated to each broadcast system because the inter-operability of different delivery media to transport the return channel is desirable. The solutions provided in the present document for interaction channel for LMDS networks are a part of a wider set of alternatives to implement interactive services for Digital Video Broadcasting (DVB) systems.