The H805VDTF is a 24-port VDSL2 over ISDN service board. It works with the VDSL transceiver unit-remote end (VTU-R) through the VDSL port to support the VDSL2 service. Working principle of the H805VDTF board： The basic working principle of the H805VDTF 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 forwarding module converts between ATM/PTM services and IP services, and also supports flow control and scheduling. * The interface module provides the ports for information exchange. * The power module supplies power to each functional module of the board. * The clock module provides clock signals for each functional module of the board. In the upstream direction, the interface module converts the VDSL2 signals into a cell...
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