H801TOPA Board
The H801TOPA is a TDM traffic over PSN board. It uses the daughter
board to transmit services upstream.
Overview
The H801TOPA board supports the following functions:
Native TDM function (when the NH1A/O2CE daughter board is
configured)
CESoP function (when the EH1A/CSSA daughter board is configured)
TDM signal upstream transmission through the 16 channels of E1 port
(when the NH1A/EH1A daughter board is configured)
TDM signal upstream transmission through the 2 channels of STM-1
optical port (when the O2CE/CSSA daughter board is configured, )
Parameters
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 |
TDM service process board |
H801TOPA | H801NHlA daughter board: Static: 24.2 W Maximum: 25.3 W H801EH1A daughter board: Static: 24.2 W Maximum: 25.3 W H801O2CE daughter board: Static: 24 W Maximum: 24.5 W H801CSSA daughter board: Static: 25 W Maximum: 25 W | - |
Working Principle
Figure 1 Working principle of the H801TOPA board
The basic working principle of the H801TOPA board is as follows:
The control module loads the board software, 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 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, after passing the interface module, the
GE signals from the backplane are converted into the TDM frames.
Then, the TDM frames are transmitted upstream.
In the downstream direction, the interface module receives the
signals from the TDM line, and converts and encapsulates the
signals into GE packets. After being transmitted to the backplane
bus through the service processing module, the GE packets are
transmitted to the control board. Then, the control board forwards
the GE packets to the related service boards.
