The H805ADIF board is a 32-port ADSL2+ over ISDN service board. It works with the ADSL terminal unit-remote end (ATU-R) through the ADSL2+ port to provide 32 channels of ADSL2+ signals. Working principle of the H805ADIF board: The basic working principle of the H805ADIF board is as follows: * The control module loads the board software, controls the running of the board, and manages the entire board. * The protection module protects and isolates the board from lightning strikes. The DC block isolates the direct current. The protector protects the high voltage. * The interface module supports two functions: – In the upstream direction, the interface module converts line signals into a cell flow, aggregates the flow to the forwarding module, and then reorganizes the flow into ATM packets. – In the downstream direction, the forwarding module transmits the ATM cell flow to the interface module. Then, the interface module converts the flow into downstream line signals. * Th
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