Which of the following description of the DM12 board are correct? (Multiple choice)
A . One DX1 board can be used with two DM12
B . Access the NX6bit/s and sub-rate service signals through the DB28 connector on the DM12 board.
C . Electrical signal input and output interfaces for DDN, Unframed E1 and sub-rate services
D . Accessing
E . 703 64 kbit/s co-directional service signals through the DB44 interface on the DM12 board
Answer: ABD