Hong Telecom Equipment Service LTD

The H805VDMF is a 48-port VDSL2 over POTS 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 H805VDMF board: The basic working principle of the H805VDMF board is as follows: * The control module loads the board software, controls the running of the board, and  manages the entire board. l* 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 the ATM/PTM service and the IP service, 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. The service process is as follows: * In the upstream direction, t...