Version Description

The available functional versions of the VA4 board are TN12 and TN13.

Mapping Between the Board and OptiX OSN 9800 Universal Platform Subrack

The following provides the board(s) supported by the product. However, the availability of the board(s) is subject to PCNs. For PCN information, contact the product manager at your local Huawei office.

Differences Between Versions

Specification:

For the specification of each version, see VA4 Specifications.

Substitution Relationship

Update Description

This section describes the hardware updates in V100R001C01 and later versions as well as the reasons for the updates. Any product versions that are not listed in the document means that they have no hardware updates.

Hardware Updates in V100R001C20SPC360

Hardware Updates in V100R001C01

Application

As a variable optical attenuator unit, the VA4 board adjusts power for four optical signals.

Figure 1 illustrates the position of the VA4 board in a WDM system.

Functions and Features

The VA4 board adjusts power for up to four signals and provides power-off protection.

Table 1 describes the functions and features of the VA4 board.

Table 1 Functions and features of the VA4 board

Working Principle and Signal Flow

The VA4 board consists of four variable optical attenuators, a driver and control module, a control and communication module, and a power supply module.

Figure 1 shows the functional modules and signal flow of the VA4 board.

Figure 1 Functional modules and signal flow of the VA4 board 

Signal Flow

According to the instructions from the SCC board, the VA4 board adjusts the power of four channels of optical signals by using a variable optical attenuator.

Module Functions

Variable optical attenuators

Adjust the power of the four received optical signals.

Driver and control module

Detects the power of the incoming and outgoing signals of the VA4 board.

Provides a drive signal and control signal to each variable optical attenuator, and reports the detected attenuation to the control and communication module.

Control and communication module

Controls board operations.

Controls the operations on each module of the board according to CPU instructions.

Collects information about alarms, performance events, working states, and voltages from functional modules on the board.

Communicates with the SCC board.

Power supply module

Converts the DC power supplied from the backplane into appropriate power required by each module on the board.

Front Panel

There are indicators, interfaces, and a laser hazard level label on the front panel of the VA4 board.

Appearance of the Front Panel

Figure 1 shows the front panel of the VA4 board.

Figure 1 Front panel of the VA4 board 

Indicators

Four indicators are present on the front panel:

Board hardware status indicator (STAT) - triple-colored (red, green, yellow)

Service active status indicator (ACT) - dual-colored (red, green)

Board software status indicator (PROG) - dual-colored (red, green)

Service alarm indicator (SRV) - triple-colored (red, green, yellow)

For details about these indicators, see Board Indicators.

Interfaces

Table 1 describes each interface on the VA4 board.

Table 1 Interfaces on the VA4 board

Laser Hazard Level

The laser hazard level of the board is HAZARD LEVEL 1M, indicating that the maximum power launched by the board ranges from 10 dBm (10 mW) to 21.3 dBm (136 mW).

Valid Slots

The VA4 board is a single-width board (requiring one slot).

Table 1 lists the valid slots for the VA4 board.

Table 1 Valid slots for TN12VA4/TN13VA4 board

 NOTE:

When a system control board is installed in slot IU2 of the OptiX OSN 9800 universal platform subrack subrack, the TN13VA4 board cannot be installed in slot IU1.

Characteristic Code for the VA4

The characteristic code for the VA4 board contains three digits, indicating the maximum attenuation of the optical signals processed by the board.

Detailed information about the characteristic code is given in Table 1.

Table 1 Characteristic code for the VA4 board

For example, the characteristic code for the VA4 board is 21.5, indicating that the board allows for a maximum attenuation of 21.5 dB.

Physical Ports Displayed on the NMS

This topic describes the interface information on the U2000.

Display of Optical Interfaces

Table 1 provides the mapping between the optical ports on the VA4 board and port numbers displayed on the U2000.

Table 1 Mapping between the optical ports on the VA4 board and port numbers displayed on the U2000

 NOTE:

The port number displayed on the U2000 indicates a physical port pair, in which one port transmits signals and the other receives signals.

Parameters Can Be Set or Queried by NMS

This section lists the board parameters that can be set or queried by using the NMS.

For VA4 Parameters, refer to Table 1.

Table 1 VA4 parameters

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