H831CCMA

H831CCMA is a central control unit (CCU) board. It manages broadband and narrowband service boards and interface modules, and is used for upstream service transmission.

Functions and Specifications

Board Power Consumption

For details, see "Board Power Consumption".

Working Principle

Figure 1 illustrates the working principle of the H831CCMA board.

Figure 1 Working principle of the H831CCMA board

The basic working principle of the H831CCMA board is as follows:

• The voice daughter board provides a built-in DSP chip, processes voice frequency signals, and converts digital signals into VoIP packets.

• The clock daughter board supports time synchronization and tracking of the system clock.

• The upstream processing module provides 2 SFP ports and supports GPON, XG-PON, GE, and 10GE upstream transmission.

• The control and service processing module manages other components on the board through the management port, and provides service ports to connect to service boards and process services.

• The logic module controls clock source selection and resets.

• The power module controls the power provided through the backplane for feeding each component of the board.

• The clock module provides the working clock signals for other function modules of the board.

Ports on the Front Panel

Figure 2 Ports on the front panel of the H831CCMA board

 NOTE:

• Different optical modules can be configured to meet requirements of different application scenarios.

• For details on parameters and types of optical modules, see "Optical Module".

• The CONSOLE/ESC port (RJ45 port) is connected to the maintenance terminal and environment monitoring device using the local maintenance and environment monitoring combo cable.

Indicator

Pin Assignment

Table 2 shows the pin assignment of the ALARM port on the front panel of the H831CCMA board.

 NOTE:

• Default settings in Table 2 are recommended values. In practice, the ALARM port is connected to various types of Boolean value output sensors as required.

• When the default setting of a pin is different from the actual sensor corresponding to the pin, the default setting needs to be changed using the CLI so that it is the same as the actual setting.

• Each Boolean value output sensor corresponds to a pair of pins. In the case of a short circuit, the corresponding digital parameter is 0; in the case of an open circuit, the corresponding digital parameter is 1.