According to the rules laid down by the ministry, it is obligatory for every DTH operator to provide the 24 channels to their subscribers, irrespective of any bouquets or ala-carte channels being subscribed by them.
Sources said it had come to the notice of the ministry that some DTH operators were not showing all the mandatory channels.
It was noticed that while one of the DTH service providers was beaming only eight of the mandatory 24 channels, another was showing 17 channels, a source said. The third company which has been given the showcause notice was carrying only 18 channels, the source said.
The channels which cable operators must show are DD National, DD News, DD Bharati, DD Urdu, DD Sports, DD India, DD Kashir, DD Punjabi, DD Girnar, DD Sahyadri, DD Saptagiri, DD Malayalam, DD Podhigai, DD Chandana, DD Bangla, DD North East, DD Bihar, DD Uttar Pradesh, DD Rajasthan, DD Madhya Pradesh, DD Oriya, Gyan Darshan, Lok Sabha TV and Rajya Sabha TV.