sentences:  A multiplex is an electronic system which combines programme material and related and other data in a digital form and the transmission of that material and data by means of wireless telegraphy, either directly or indirectly for reception by the general public.Channels and associated channel data such as interactive services related to that channel in effect can be broadcast on a transmission network multiplex subject to Broadcasting Commission of Ireland license.Sound broadcasting multiplex means a multiplex in which programme material is mostly sound orientated and television broadcasting multiplex is likewise mainly television broadcasting.