Huawei H805VDSF 24-Port VDSL2 over POTS Service Boar

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 signals for each functional module of the board.

The service processing flow is as follows:

* In the upstream direction, the interface module converts the VDSL2 signals into a cell flow, aggregates the flow to the forwarding module, and then reorganizes the cell flow into ATM/PTM packets. The forwarding module encapsulates the reorganized. ATM/PTM packets into IP packets and performs CAR on the IP packets. The IP packets are transmitted to the backplane bus through the backplane port and then to the control board. After being processed by the control board, the IP packets are transmitted upstream to the upper level device through the optical or electrical port.

* In the downstream direction, the forwarding logical decapsulates the IP packets from the Ethernet, performs CAR on the IP packets, reorganizes the IP packets into ATM/PTM packets, and transmits the ATM/PTM packets to the interface module. The interface module converts the ATM/PTM packets into analog signals and transmits the signals to subscriber lines.

Port of the H805VDSF board with the function supports 0-23 channels of VDSL2 services.

Front Panel Port:

Indicator of H805VDSF:

Pin assignments of the xDSL port:

Hong Telecom Equipment Service Limited (HongTelecom) is a leading professional equipment distributor and service provider in telecommunication infrastructure and solution field, can provide H805VDSA/H805VDSF XDSL2+ boards with the shortest lead time and higher quanlity.