Hong Telecom Equipment Service LTD

The H805VDSF is a 24-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 H805VDSF board: The H805VDSF board mainly consists of these functional modules: control module, forwarding module, interface module, power module, and clock module.  The basic principles are described as follows: * The control module loads the board software, controls the running, and manages the whole 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 supports conversion 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 ...