Technically its not possible for any DTH to provide the customer premises video input thru its sat transmission. It has to be a local loop which is mixed into the feed on the premises itself. It is some mixing happening at the cabling between the dish that is receiving the signals and the apartment owners engineering room from where the cables go to individual apartments. As an Architect I will be really interested in knowing this as we have to provide a separate video phone for each apartment and how this can be avoided. If it si only possible with TS is a difficult one to say as it might be something in the software of the STB, and as Airtel DTH and TS have the same software provider NDS , I think it shud be possible with Airtel DTH too.