Huawei TN12DCP 2-channel optical path protection board

Version Description

The DCP board has three functional versions: TN11, TN12, and TN13. Together these three versions are referred to as the DCP board unless otherwise specified.

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.

Variants

The table below describes the available variants of the DCP board.

Differences Between Versions

Function:

The TN11DCP board supports multi-mode optical modules.

The TN12DCP/TN13DCP board supports single-mode optical modules.

Specifications:

The power consumption varies according to the board version being used. For details, see DCP 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 V100R002C10&V100R002C00SPC810

Hardware Updates in V100R001C20SPC360

Hardware Updates in V100R001C01

Application

As an optical protection unit, the DCP board provides intra-board 1+1 protection and client 1+1 protection.

Figure 1 and Figure 2 illustrate the position of the DCP board in a WDM system.

Figure 1 Position of the DCP board in a WDM system (intra-board 1+1 protection) 

 NOTE:

When used for intra-board 1+1 protection, the DCP board does not support 2.5 Gbit/s OTUs.

Figure 2 Position of the DCP board in a WDM system (client 1+1 protection) 

 NOTE:

When the DCP board is used to provide client 1+1 protection, the working and protection OTUs must be installed in different subracks or chassis.

Functions and Features

The DCP board provides intra-board 1+1 protection and client 1+1 protection.

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

Table 1 Functions and features of the DCP board

Working Principle and Signal Flow

The DCP board consists of an optical module, control and communication module, and power supply module.

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

Figure 1 Functional modules and signal flow of the DCP board 

Signal Flow

One DCP board provides protection for two optical signals. The DCP board processes the two optical signals identically. This following describes the service flow of one optical signal.

Transmit direction

The DCP board receives a protected signal through the TI1 port and uses splitter 1 to split the signal into two identical signals. Then the two optical signals are directed out to the working and protection fibers (paths) through the TO11 and TO12 ports.

Receive direction

The DCP board receives the working and protection signals through the RI11 and RI12 ports, respectively. Then the working and protection signals are sent to optical switch 1, and a sample of each signal is directed to the power detection module to detect their power levels. The control and communication module compares the detected power levels of the two signals and enables optical switch 1 to select the signal with the higher power level. Lastly, the selected signal is output through the RO1 port.

Module Functions

Optical module

The optical module performs dual-fed and selective receiving of two protected signals.

Transmit direction

Splits each of the two signals into two identical signals and directs them onto the working and protection paths.

Receive direction

Receives two working and protection signals while providing a sample of each of the signals to the power detection module to detect the signal power levels. The power detection module reports the detection results to the control and communication module to compare the power levels of the working and protection signals. Then each optical switch inside the optical module selects the signal with the higher power level and directs it out the corresponding port.

Control and communication module

Compares the power levels of the working and protection signals and enables the optical switch to select the signal with the higher power level.

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 and interfaces on the front panel of the DCP board.

Appearance of the Front Panel

Figure 1 shows the front panel of the DCP board.

Figure 1 Front panel of the DCP 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 DCP board.

Table 1 Interfaces on the DCP board

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