The H-ASI-T1 ASI to E1 adapter is designed to carry a DVB-ASI transport stream over 4 standard 2 megabit E1 links. This unit makes it possible to transmit a digital TV program signal through a telecom network. This is possible by combining the 4 separate E1 lines into a single pipe for the ASI transport stream. This is useful for TV broadcast signal transport applications where an existing telecom network is present.