What’s N3EAS2?

The EAS2 is used to transmit/receive Ethernet services, manage bandwidths, and realize Layer 2 switching of Ethernet services, applied to Huawei OSN3500 and OSN7500. EAS2 boards support the transmission of 10 GE Ethernet services, LCAS, and test frame functions.

Front Panel Ports

The front panel of the EAS2 provides two 10GE ports. One port is IN1-IN2 to receive 10GE signals; the other is OUT1-OUT2 to transmit 10GE signals. Both ports are the LC connector type.

Front panel of the EAS2 

Working Principle and Signal Flow

The EAS2 consists of the interface processing module, mapping module, interface converting module, logic and control module, clock module, and power module.

• In the Transmit Direction

The encapsulation or conversion module demaps and decapsulates the signals received from the cross-connect unit. Then, the interface converting module performs the interface converting operations and transmits the signals to the service processing module. The service processing module implements the functions of the Layer 2 switching and private line service. After the interface processing module converts parallel signals to serial signals and encodes the serial signals, the Ethernet interface module transmits the serial signals.

• In the Receive Direction

The optical module performs O/E conversion on the 10 GE Ethernet signals, and then transmits the signals to the Ethernet interface module. The Ethernet interface module transmits the parallel signals to the service processing module to realize the functions of the Layer 2 switching and private line service. The encapsulation module encapsulates and maps the Ethernet GFP-F frames, and then transmits the signals to the cross-connect unit.

•  Logic and Control Module

The logic and control module provides the communication, control, and service configuration functions of the board.

• Clock Module

The clock module traces the system reference clock, and generates the required clock signals when the board is working.

• Power Module

It converts the –48 V/–60 V power supply into the DC voltages that the modules of the board require.

Functional block diagram of the EAS2

SSN3EAS201

PN: 03053445

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N3EAS2 Detailed Specification

Difference between N1 and N3 functional version

The EAS2 is available in the following functional versions: N1 and N3. Differences are as below:

From above information, we shall know the N3EAS2 basic functions and can better undertstand the differences between N1EAS2 and N3EAS2.

If any questions about N3EAS2, please contact our Thunder-link team Support@thunder-link.com