Huawei CR-A2HFF Manuale utente

Quidway® NetEngine 80 Core Router ATM Optical Interface Boards

Copyright ©2007 Huawei Technologies Co., Ltd. All Rights Reserved.

http://www.huawei.com/products/datacomm/ 1

Quidway® NetEngine 80 Core Router

ATM Optical Interface Boards

Overview

In addition to abundant IP network modules, the Quidway®NetEngine 80 core router (abbreviated

to NE80) provides ATM modules to be compatible with traditional ATM networks, satisfying users'

higher bandwidth and QoS requirements for networking. The NE80 supports the OC-3/STM-1 ATM

optical interface board and the OC-12/STM-4 ATM optical interface board.

CR-A8CFF

CR-A2HFF

The ATM interface board implements functions of the physical layer and the data link layer in

network connections. The sequence of bearing/encapsulation from bottom up is as follows: Optical

signals transmit SONET/SDH frames, SONET/SDH frame container bears the 53-byte ATM cells,

and ATM AAL5 encapsulates IP packets or data packets of other types. The interface line board

extracts data packets from this series of bearing and encapsulation and transmits them to the

network after encapsulation and translation processing.

Quidway® NetEngine 80 Core Router ATM Optical Interface Boards

Copyright ©2007 Huawei Technologies Co., Ltd. All Rights Reserved.

http://www.huawei.com/products/datacomm/ 2

The OC-3/STM-1 ATM optical interface board provides 155M transmission channels, and the

OC-12/STM-4 ATM optical interface board provides 622M transmission channels. Both boards use

hot-pluggable SFP optical modules. In actual networking, you must first choose the optical interface

board type based on ATM network rate, and then choose the proper SFP optical module based on

transmission distance.

Specifications

Currently, the NE80 supports two types of OC-3/STM-1 ATM optical interface boards (CR-A4CFF

and CR-A8CFF) and one type of OC-12/STM-4 ATM optical interface board (CR-A2HFF).

Module name Interface type Description

CR-A4CFF LC 4-port 155M ATM optical interface board: Different

SFP optical modules can be chosen for different

transmission distances.

CR-A8CFF LC

8-port 155M ATM optical interface board: Different

SFP optical modules can be chosen for different

transmission distances.

CR-A2HFF LC

2-port 622M ATM optical interface board: Different

SFP optical modules can be chosen for different

transmission distances.

The NE80 supports the following four types of 155MATM SFP optical modules:

Interface rate 155 Mbps

Maximum

transmission distance 2 km 15 km 40 km 80 km

Center wavelength 1310 nm 1310 nm 1310 nm 1550 nm

Min. -19 dBm -15 dBm -5 dBm -5 dBm

Transmitting

optical power Max. -14 dBm -8 dBm 0 dBm 0 dBm

Receiving sensibility -30 dBm -28 dBm -34 dBm -34 dBm

Overload optical

power -14 dBm -7 dBm -9 dBm -10 dBm

Quidway® NetEngine 80 Core Router ATM Optical Interface Boards

Copyright ©2007 Huawei Technologies Co., Ltd. All Rights Reserved.

http://www.huawei.com/products/datacomm/ 3

The NE80 supports the following three types of 622MATM SFP optical modules:

Interface rate 622 Mbps

Maximum transmission

distance 15 km 40 km 80 km

Center wavelength 1310 nm 1310 nm 1550 nm

Min. -15 dBm -3 dBm -3 dBm

Transmitting

optical power Max. -8 dBm 2 dBm 2 dBm

Receiving sensibility -28 dBm -28 dBm -28 dBm

Overload optical power -8 dBm -8 dBm -8 dBm

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