Version Description

The OBU is available in the following functional versions: TNF1 and TNF2.

Version

Table 1 describes the version mapping of the OBU board.

Table 1 Version description of the OBU board

Version Difference

Table 2 provides the version difference of the OBU board.

Table 2 Version difference of the OBU board

Logical Board Name

The logical board name of the OBU board varies depending on the system control board used on the NE.Table 3 describes the logical board name of the OBU board.

Table 3 Logical board name of the OBU board

Application

The OBU board is used at the transmit or receive end to amplify optical signals in the C band.

For the application of the OBU board in the WDM system, see Figure 1.

Functions and Features

The main functions and features supported by the OBU are optical signal amplification, online optical performance monitoring, gain locking function, and alarm and performance events monitoring.

For details about the functions and features, see Table 1.

Table 1 Functions and features of the OBU

Working Principle and Signal Flow

The OBU board consists of five parts: the EDFA optical module, the drive and detection module, the variable optical attenuator, the communication module, and the power supply module.

Figure 1 shows the functional block diagram of the OBU board.

Figure 1 Functional block diagram of the OBU board 

 NOTE:

An EVOA is used to adjust signal optical power. You can either attach the EVOA to the OUT optical port to adjust the transmit optical power of this board or attach the EVOA to the IN optical port to adjust the receive optical power of this board. Variable optical attenuators are optional for the TNF1OBU board but internally equipped in the TNF2OBU board.

Signal Flow

One multiplexed optical signal received through the IN port is input to the erbium-doped fiber amplifier (EDFA) optical module. The EDFA optical module amplifies the optical power of the signal and locks the gain of the signal. Then, the amplified multiplexed signal is output through the OUT port

The multiplexed signal can also be input from the VI optical port, and output from the VO optical port after the optical power is adjusted, and then received by the IN optical port.

Functional Modules

EDFA optical module

Multiplexed signal light and pump light enter the erbium-doped fiber for amplification. The erbium-doped fiber that is excited by the pump laser can amplify the optical signal to implement the optical power amplification function.

The optical splitter splits some optical signals from the main optical path and provides them to the MON port for detection.

Drive and detection module

Detects the optical power of service signals in real time.

Detects the drive current, back facet current, cooling current, and operating temperature and ambient temperature of the pump laser inside the EDFA optical module in real time.

Drives the pump laser inside the EDFA optical module.

Reports alarms and performance events to the communication module.

Variable optical attenuator

Adjust the transmit or receive optical power.

After the TNF1OBU board is powered on, the default attenuation of the EVOA retains the maximum value 20 dB, ensuring that the board is not overloaded.

After the TNF2OBU board is powered on, the default attenuation of the EVOA retains the value 17 dB.

Communication module

Collects the information of alarms, performance events, and working states of each functional module of the unit.

Communicates with the system control, switching, and timing board, to control and operate on each module of the unit.

Power supply module

Converts the DC power into the power required by each module of the unit.

Front Panel

There are indicators, ports and laser safety label on the OBU front panel.

Appearance of the Front Panel

Figure 1 show the front panel of the OBU board.

Figure 1 Front panel of the TNF1OBU board 

Figure 2 Front panel of the TNF2OBU board 

Indicators

There are some indicators on the front panel.

Working status indicator (STAT) -red, green, orange

Service status indicator (SRV) - red, green, orange

WDM-side receive optical power status indicator (INn)- red, green, orange

For details on the indicators, refer to Board Indicators.

Ports

There are five optical ports on the front panel of the OBU. Table 1 lists the type and function of each port.

Table 1 Ports on the front panel of the OBU

Valid Slots

The OBU board occupies one slot.

Table 1 Valid slots for the OBU board

Optical Ports

This topic introduces the display of ports on the board.

Display of Optical Ports

Table 1 and Table 2 list the sequence numbers of the optical ports on the OBU board displayed in the NMS system.

Table 1 Display of the TNF1OBU optical ports

By leveraging our strong R&D capabilities, comprehensive technical expertise, and continuous technical innovations, Commai is committed to building an open, flexible, resilient, and secure platform in the Network and communication industry to orchestrate a sustainable, multi-win ecosystem. Following the guiding principle of Business-Driven ICT Infrastructure (BDII), Commai teams up with customers and partners in joint innovations. By doing so, we help customers from a variety of industries – including government and public sectors, finance, energy, transportation, and manufacturing – stay ahead in the new ICT era, and jointly build a Better Connected World.

1.Good Reply: Your inquiry related to our products or price will be replied within 24 hours.
2.OEM&ODM: We can help you to design and put your good idea into products.
3.Warranty: 1-years warranty.

4.Technology support: On-site technical support, Telemaintenance, Free call and E-mail technology supports.

5.Training service support: Provide free training service on installation and debugging.

1.Can we get a lower price? 
   Yes,price is not a problem,everything could be negotiated based on the quantity.

2.What is your MOQ?
   No MOQ for any sample test.

3.OEM,ODM Service is available?
   Yes, Commai have strong ability to offer customers ODM&OEM products of highest quality.
   And it will requirement about your quantity.