Question

At the dsl local carrier's office, the __________ demultiplexes the data streams and converts them into digital data.

Answer 1

At the DSL (Digital Subscriber Line) local carrier's office, the  DSLAM demultiplexes the data streams and converts them into digital data.

DSLAM stands for Digital Subscriber Line Access Multiplexer. It is a network device, usually at a telephone company central office that aggregates individual subscriber lines  into a high-capacity uplink.