H801TOPB Board
The H801TOPB is a TDM traffic over PSN board. It provides two STM-1
ports for transmitting TDM services to the upstream.
Overview
The H801TOPB board supports the following functions:
Native TDM function
CESoP function
TDM signal upstream transmission through two STM-1 optical ports
Intra-board and inter-board 1+1 port protection
Automatic shutdown in times of high temperatures
Specifications
Power Consumption and Maximum Frame Size of Boards
You can query power consumption, maximum frame size, and normal
operating temperature of all boards.
lists the power consumption and maximum frame size of boards. "-"
indicates N/A.
The operating temperature of all the boards is -40°C to +65°C. The
lowest board startup temperature is -25°C.
NOTE:
The power consumption of the board is tested in the following
conditions:
Working voltage: -53.5 V DC.
Ambient temperature: 25 °C.
Static power consumption: All ports do not carry any loads.
Specifically, users under POTS ports hang up phones, xDSL ports are
deactivated, and optical modules are not installed on optical ports
Maximum power consumption: All ports fully carry loads. However,
only 25% users under POTS ports concurrently pick up phones and the
feeding current is 20 mA.
The board power consumption slightly varies with the power module
configured for the board and discreteness of components.
Table 1 Power consumption and maximum frame size of boards
Board | Power Consumption | Maximum Frame Size |
H801TOPB | Static: 13 W Maximum: 16 W | - |
Working Principle
Figure 1 Working principle of the H801TOPB board
The basic working principles of the H801TOPB board are as follows:
The control module loads the board software, and controls and
manages the entire board.
The service processing module allocates the GE bus of the backplane
and processes signals.
The interface module converts signals.
The power module supplies power to other function modules of the
board.
The clock module provides the working clock signals for other
function modules of the board.
The service processing procedure of the H801TOPB board is as
follows:
In the upstream direction, GE signals from the backplane travel
trough the interface module and are converted into the TDM frames.
Then the TDM frames are transmitted upstream.
In the downstream direction, the interface module receives signals
from the TDM line and converts the signals into the GE packets.
Then the service processing module processes the GE packets and
forwards them to the backplane bus. The backplane bus transmits the
GE packets to the control board and then the control board
allocates the GE packets to respective service boards
