H801MCUD1 Board
The H801MCUD1 board is a mini control unit board. It is the core of
the system control and service switching and aggregation. The
H801MCUD1 board can also function as the management and control
core of the integrated network management system (NMS). It
communicates with service boards about the key management and
control information through the master/slave serial port and inband
GE/10GE channel. In this manner, the H801MCUD1 board configures,
manages, and controls the device, and also implements the simple
route protocol functions.
Feature and Specifications
MCU Boards Comparison
All MCU boards support the functions as below:
System control and management unit
Active/standby switchover and load sharing
Local and remote maintenance through maintenance serial port CON or
maintenance Ethernet port ETH
Environmental monitoring
Synchronization with the Ethernet clock
Temperature querying and high temperature alarming
Monitoring and management of the fan tray
Seven alarm digital inputs (DIs) and one alarm digital output (DO)
Copper and optical access
In the table, "Yes" indicates "supported" and "No" indicates "not
supported".
Table 1 Major differences between MCU boards
Board | One input of BITS clock signals and one output of BITS clock
signals | One input of 1PPS+TOD time signals and one output of 1PPS+TOD time
signals | Stratum-3 clock | D-CMTS cluster management |
H801MCUD1 | Yes | Yes | Yes | No |
Table 2 Ports of MCU boards
H801MCUD12 GE ports and 2 GE/10 GE ports
Board | Panel ports | Internal interfaces |
Channel to the GIU board | Channel to the standby control board |
| 2 GE/10GE ports | Providing one 10GE port for load sharing with the standby H801MCUD1
board |
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 |
Control board (MCU) |
H801MCUD1 | Static: 29 W Maximum: 33 W | 2052 bytes. After the jumbo frame function is enabled, a maximum of
9216 bytes can be supported. |
Working Principle
The basic working principles of the H801MCUD1 board are as follows:
The control module manages the entire board and the service boards.
The logical module achieves the logical control and stratum-3 clock
functions.
The power module supplies power to other functional modules of the
board.
The clock module provides clock signals for other functional
modules of the board.
The switching module provides the GE port and the 10GE port to
switch and aggregate services at Layer 2 or Layer 3.
Providing two GE/10GE ports or two GE ports for upstream
transmission of the upstream port on the front panel
Providing two GE/10GE ports for implementing GE/10GE switching on
each service board
