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OptiX OSN 1800 Compact Multi-Service Edge Optical Transport Platform V100R003C01

Product Overview

Issue 01

Date 2011-07-05

HUAWEI TECHNOLOGIES CO., LTD.

Issue 01 (2011-07-05) Huawei Proprietary and Confidential

Copyright © Huawei Technologies Co., Ltd

iii

Copyright © Huawei Technologies Co., Ltd. 2011. All rights reserved.

No part of this document may be reproduced or transmitted in any form or by any means without prior

written consent of Huawei Technologies Co., Ltd.

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and other Huawei trademarks are trademarks of Huawei Technologies Co., Ltd.

All other trademarks and trade names mentioned in this document are the property of their respective

holders.

Notice

The purchased products, services and features are stipulated by the contract made between Huawei and

the customer. All or part of the products, services and features described in this document may not be

within the purchase scope or the usage scope. Unless otherwise specified in the contract, all statements,

information, and recommendations in this document are provided "AS IS" without warranties, guarantees or

representations of any kind, either express or implied.

The information in this document is subject to change without notice. Every effort has been made in the

preparation of this document to ensure accuracy of the contents, but all statements, information, and

recommendations in this document do not constitute the warranty of any kind, express or implied.

Huawei Technologies Co., Ltd.

Address: Huawei Industrial Base

Bantian, Longgang

Shenzhen 518129

People's Republic of China

Website: http://www.huawei.com

Email: [email protected]

http://www.huawei.com/

mailto:[email protected]

OptiX OSN 1800 Compact Multi-Service Edge Optical

Transport Platform

Product Overview Contents



v

Contents

1 Introduction................................................................................................................................. 1-1

2 Hardware Architecture .............................................................................................................. 2-1

3 Types and Scenarios of Service Access .................................................................................. 3-1

4 Product Features ......................................................................................................................... 4-1

5 Technical Specifications ........................................................................................................... 5-1


Transport Platform

Product Overview 1 Introduction



1-1

1 Introduction

1.1 Positioning

The OptiX OSN 1800 series are designed for metropolitan edge applications, including

metropolitan convergence layer and access layer. They can be placed in the uplink direction of

a broadband or mobile bearer equipment. After being processed in the metropolitan access

layer network, the broadband, SDH, or Ethernet services are sent to the convergence node in

the metropolitan transport network. In this way, the services are extended to the access layer,

together with the use of existing OptiX WDM equipment. In a network with low capacity, the

OptiX OSN 1800 series can be used at the metropolitan core layer.

The OptiX OSN 1800 series use the dense wavelength division multiplexing (DWDM) and

the coarse wavelength division multiplexing (CWDM). Wavelength grooming can be

performed at the node that consists of the OptiX OSN 1800 series. The wavelength grooming

features easy capacity expansion, flexible service access, high bandwidth utilization, and high

reliability.

1.2 Benefits

Access of Abundant Services: The OptiX OSN 1800 supports all types of services with the

rate of 1.5 Mbit/s to 10 Gbit/s.

OTN Encapsulation: All services are encapsulated as the OTN frames for unified

transmission.

EDFA: The OptiX OSN 1800 DWDM system uses advanced Erbium-doped fiber amplifier

(EDFA) technology for long haul transmission with no regenerator.

CWDM and DWDM Hybrid Network: In the initial network construction, the CWDM

system is used to make the services be available quickly. With the increasing demand of

broadband services and service traffic, the system can be smoothly upgraded to the DWDM

system.

Any ADM: The OptiX OSN 1800 series support the cross-connect function of services with

rate lower than 1.25 Gbit/s.

Layer 2 Switching: The OptiX OSN 1800 series support VLAN- and stack VLAN-based

Layer 2 switching and Layer 2 convergence of GE services to 10GE services.

ODUflex: By using this technology, users can flexibly configure ODUk based on the service

capacity, therefore fully using the line bandwidth.

1 Introduction


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Product Overview

1-2 Huawei Proprietary and Confidential


Issue 01 (2011-07-05)

Single-Fiber Bi-Directional Transmission: The OptiX OSN 1800 series provide the

single-fiber bidirectional transmission solution. That is, one fiber is shared for the receiving

and transmitting of multi-wavelength optical signals. In this way, fiber resources are

effectively utilized.

Easy Installation: The equipment is an 1U height or 2U height box. It is light and compact.

Therefore, a single person can solely install the equipment.

Simplified Commissioning: There are indicators on boards, indicating their running status

and optical power receiving status. This facilitates the on-site installation and commissioning.

Temperature-hardened feature: In some special configuration scenarios, some boards can

function properly at extremely low or high temperature.


Transport Platform

Product Overview 2 Hardware Architecture



2-1

2 Hardware Architecture

2.1 Structure

The equipment is compact and easy for installation and maintenance. With air filter-free

design, the equipment eliminates the need for on-site maintenance.

There are two types of chassis: 1800 I and 1800 II. They are equipped with the hot standby

power supplies, which can be either DC (-48 to -60 V) or AC (100 V to 240 V). The chassis

can be installed in an ETSI cabinet (300 mm depth), a 19-inch cabinet (open rack) or an

outdoor cabinet. Desk-top or wall-mounted installation is also possible.

Structure of the OptiX OSN 1800 I Chassis

An OptiX OSN 1800 I chassis can be an ordinary chassis or a chassis integrated with a fiber

management tray (FMT). An ordinary chassis can be a DC or AC power-supply chassis, but a

chassis integrated with an FMT can be an DC power-supply chassis only. A DC power-supply

chassis uses the PIU board and an AC power-supply chassis uses the APIU board. On the AC

power-supply chassis, the APIU board occupies two service slots and the slot for housing the

PIU board is installed with a filler panel.

The PIU and APIU boards cannot be installed on the same chassis. Install the PIU board only on a DC

power-supply chassis and install the APIU board only on an AC power-supply chassis.

Figure 2-1, Figure 2-2 andFigure 2-3 show the appearance of the I chassis.

Figure 2-1 Oblique view of an ordinary OptiX OSN 1800 I chassis (DC power-supply chassis)



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Product Overview



Issue 01 (2011-07-05)

Figure 2-2 Oblique view of an ordinary OptiX OSN 1800 I chassis (AC power-supply chassis)

Figure 2-3 Oblique view of OptiX OSN 1800 I chassis integrated with an FMT (DC

power-supply chassis)

Structure of the OptiX OSN 1800 II Chassis

The OptiX OSN 1800 II chassis provides eight slots for boards. Compared with the OptiX

OSN 1800 I chassis, the OptiX OSN 1800 II chassis can access twice of the service volume

accessed by the OptiX OSN 1800 II chassis.

An OptiX OSN 1800 II chassis can be an ordinary chassis or a chassis integrated with a fiber

management tray (FMT). Both an ordinary chassis and a chassis integrated with an FMT can

be a DC or AC power-supply chassis. A DC power-supply chassis uses the PIU board and

an AC power-supply chassis uses the APIU board. On the AC power-supply chassis, the APIU

board occupies two service slots and the slots for housing the PIU boards are installed with

two filler panels.

The PIU and APIU boards cannot be installed on the same chassis. Install the PIU board only on a DC

power-supply chassis and install the APIU board only on an AC power-supply chassis.

Figure 2-4, Figure 2-5 andFigure 2-6 show the appearance of the II chassis.


Transport Platform




2-3

Figure 2-4 Oblique view of an ordinary OptiX OSN 1800 II chassis (DC power-supply chassis)

Figure 2-5 Oblique view of an ordinary OptiX OSN 1800 II chassis (AC power-supply chassis)

Figure 2-6 Oblique view of OptiX OSN 1800 II chassis integrated with an FMT (AC and DC


Structure of the OptiX OSN 1800 I OADM frame

The OptiX OSN 1800 I OADM frame, whose height is 1U, provides four slots for boards.

The OADM frame can be used to house the optical add/drop multiplexer boards. As a result,

the number of the accessed wavelengths are doubled and the networking with low cost is achieved. The SCC board on the OptiX OSN 1800 I or II chassis is connected to the CTL



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Product Overview



Issue 01 (2011-07-05)

board in the OADM frame, thus achieving management of the OADM boards in the OADM

frame. The CTL board is installed on the left of the OADM frame.

The appearance of the OADM frame is similar with the I chassis. Figure 2-7 shows the

appearance of the OptiX OSN 1800 OADM frame.

Figure 2-7 Oblique view of the OptiX OSN 1800 OADM frame

2.2 Board Category

For the OptiX OSN 1800, the following types of boards are available:

Optical transponder board

Optical multiplexer and demultiplexer board

Optical add and drop multiplexing board

System control and communication board

Optical protection board

Power supply access board

Heat dissipation board

Table 2-1 Boards for the OptiX OSN 1800

Board Category Board Name Board Description

Optical

Transponder Unit

ELOM Enhanced 8 x Multi-rate Ports Wavelength Conversion Board

LDE Double Port EPON/GE Access Wavelength Conversion Board

LDGF Double GE Services & Double FE Services Wavelength Conversion

Board with FEC

LDGF2(TNF1LD

GF2/TNF2LDGF

2)

Double 2 x GE Wavelength Conversion Board

LEM18 16 x GE + 2 x 10GE LAN + 2 x OTU2 Ethernet Switch board

LOE 8 Port EPON/GE Access Wavelength Conversion Board

LQG 4 x GE Wavelength Conversion Board


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2-5


LQM(TNF1LQM/

TNF2LQM)

4 x Multi-rate Ports Wavelength Conversion Board

LQM2(TNF1LQ

M2/TNF2LQM2)

Double 4 x Multi-rate Ports Wavelength Conversion Board

LQPL OLT Side 4 Port GPON/STM-16/OC-48/OTU1 Access Wavelength

Conversion Board

LQPU ONU Side 4 Port GPON/STM-16/OC-48/OTU1 Access Wavelength

Conversion Board

LSPL OLT Side Single Port GPON Access Wavelength Conversion Board

LSPR Single Port GPON Extension REG Board

LSPU ONU Side Single Port GPON Access Wavelength Conversion Board

LSX(TNF1LSX/T

NF2LSX)

10 Gbit/s Wavelength Conversion Board

LDX 2-channel 10 Gbit/s Wavelength Conversion Board

LWX2 Double Arbitrary Bit Rate Wavelength Conversion Board

TSP 21-channel E1/T1 and 2-channel STM-1 Service Convergence and

Wavelength Conversion Board

Optical

Multiplexer and

Demultiplexer

Unit

FIU Fiber Interface Unit

X40 40-Channel Multiplexing or Demultiplexing Board

Optical Add and

Drop Multiplexing

Unit

DMD1 Bidirectional Single Channel Optical Add/drop Multiplexing Board

DMD1S Bidirectional Single Channel Optical Add/drop Multiplexing Board

with OSC

DMD2 Bidirectional Double Channel Optical Add/drop Multiplexing Board

DMD2S Bidirectional Double Channel Optical Add/drop Multiplexing Board

with OSC

MD8 8 Channel Multiplexing and Demultiplexing Board

MD8S 8 Channel Multiplexing and Demultiplexing Board with OSC

MR1 Single Channel Optical Add/Drop Multiplexing Board

MR1S Single Channel Optical Add/drop Multiplexing Board with OSC

MR2 Double Channel Optical Add/drop Multiplexing Board

MR2S Double Channel Optical Add/drop Multiplexing Board with OSC

MR4 Four Channel Optical Add/drop Multiplexing Board

MR4S Four Channel Optical Add/drop Multiplexing Board with OSC



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Product Overview



Issue 01 (2011-07-05)


MR8 Eight Channel Optical Add/drop Multiplexing Board

SBM1 Single Fiber Bidirectional Single Channel Optical Add/drop

Multiplexing Configuration Board

SBM2 Single Fiber Bidirectional Double Channel Optical Add/drop


SBM4 Single Fiber Bidirectional Four Channel Optical Add/drop


SBM8 Single Fiber Bidirectional Eight Channel Optical Add/drop


Optical Amplifier

Unit OPU Optical Preamplifier Unit

OBU Optical Booster Board

System Control

and

communication

Unit

CTL OADM Control Board

SCC System Control & Communication Board with OSC

Optical Protection

Unit

OLP Optical Line Protection Board

SCS Sync Optical Channel Separator Board

Power Supply

Access Unit

APIU AC Power Interface Unit

PIU DC Power Board

Heat Dissipation

Board

FAN Fan Board


Transport Platform

Product Overview 3 Types and Scenarios of Service Access



3-1

3 Types and Scenarios of Service Access

3.1 Types of Service Access

The product can access almost all types of services that are rated from 1.5 Mbit/s to 10 Gbit/s.

The OptiX OSN 1800 series supports the following types of services: SDH service

(STM-1/STM-4/STM-16/STM-64), PDH service (E1/T1), Ethernet service (FE/GE/10GE

WAN/10GE LAN), OTN service (OTU1/OTU2/OTU2e), CPRI service (CPRI option1/CPRI

option2/CPRI option3/ CPRI option6), SAN service (FC100/FC200/FC400/FC800/FC1200/

FICON/ FICON Express/ ESCON/ InfiniBand 2.5G/ InfiniBand 5G), PON service, video

services (DVB-ASI/SDI/HD-SDI/3G-SDI).

The OptiX OSN 1800 series support functions such as 4xAny service convergence, 8xAny

service convergence, 1xAny service conversion, 2xGE or 16xGE service convergence, 10GE

service convergence, and PON service transparent transmission and distance extension.

3.2 Scenarios of Service Access

The product provides various scenarios of service access, to meet the service requirements on

the access layer network.

BBU Hotel

For a distributed base station, the base band unit (BBU) and remote radio unit (RRU) are

separate. In the scenario of BBU hotel, BBUs for such distributed base stations are placed

together. The RRUs are connected to the BBUs through CPRI interfaces over fibers.

The advantages of such a scenario are as follows:

Low costs and easy operation and maintenance (O&M): A smaller number of optical

fibers and colored optical modules are used and BBUs are managed and maintained in

centralized mode.

Good performance: BBUs are placed together. In this case, the hold-off time for service

switchover among base stations is shortened.

High reliability: Protection can be implemented at the OTN layer so that services are

protected against link faults.



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Product Overview



Issue 01 (2011-07-05)

OLT Hotel

The centralized placement of OLTs gives benefits in reduced fiber consumption and enlarged

coverage. Furthermore, transmission reliability is improved thanks to the OTN layer

protection.

OptiX OSN 1800

Centralized management and

maitenance of OLTs in the

telecommunications room

……

Users

Users

Users

Users

55 km (GPON)

35 km (EPON)

Mobile Carrier Network

The 2G backhaul requires E1 service between BTS and BSC, while 3G needs FE or GE

between Node B and RNC. The OptiX OSN 1800 series provide integral carrier solution for

evolution from 2G to 3G network.


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3-3

OptiX OSN 1800

155M/622M

Node B

BTS

E1

Node BBTS

E1

Node B BTS

E1

155M BSC

RNC

FE/GE

FE/GE

FE/GE

FE/GE

MSTP 2.5G

OptiX OSN 1800MSTP

equipmentPower

cable

Network

cable

STM-1 granularity

accesses to the

convergence layer

E1 Private Line Transmission

The client-side optical interfaces on the E1 access boards of the OptiX OSN 1800 series

connect to the upper-layer MSTP equipment. The equipment is interconnected with two

optical interfaces, to achieve SDH SNCP protection.

The scenario is applicable to:

Convergence of the E1 service of all branches.

Enterprise internal data, video, and voice services that accessed through FE and E1

interfaces.

Data and voice between enterprise branches and headquarters share same E1 circuits .



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Product Overview



Issue 01 (2011-07-05)

OptiX OSN 1800

155M/622M ring

network

N x 155M

Headquarters

of company

XXPBX

Switch

SDH

N*E1

PDH

XX module

office

PBX

12M

Branch

XX

N*E1

PDH

12M

N*E1

PBX

……

PDH

PBX

12M

……

FE E1

FE E1

FE E1

XX module

office

XX module

office

Branch

XX

Branch

XX

FiberPower

cable

Network

cable

FE service flow E1 service flow

Upstream GE Service from the Urban DSLAM/MASN

The OptiX OSN 1800 series can be used to connect the DSLAM directly to the upstream

WDM.

Multiple GE services can be multiplexed into one wavelength by using the OTN

technology, and multiple wavelengths can be converged into one fiber by using the

WDM technology. This improves the fiber utilization to a great extent and thus saves

fiber resources.

The 4xAny service board (LQM) and 8xAny service board (LQM2) support the function

to converge 2xGE services plus 2xSTM-1 services to one 2.5 Gbit/s wavelength. In this

manner, one single board can carry both the upstream services on the legacy

ATM-DSLAM and the newish IP-DSLAM.

The inband overhead (ESC) of OTN can be used to transmit the NM information through

the local SDH network to the U2000. No DCN is required for remote nodes.


Transport Platform




3-5

FTTx

Mobile

broadband

DSLAM

FE/

GE

SAN

private

line

FTTx

LAN

DSLAM

Central

telecommunications

equipment room

OLT BRAS SR RNC/BSC

2-60km+

300-500m

< 100m

Curb

Building

Home/

Office

GeTTC GeTTB GeTTO

OptiX OSN

1800

ADSL2+ VDSL210/100Base-T

FiberNetwork

cable

Twisted pair

cable

Wide Broadband Coverage in Suburb and Remote Areas

To address the broadband service requirements in the suburb and remote areas, the CWDM

equipment is widely used to carry the broadband traffic at the edge of the MAN. The OptiX

OSN 1800 series has the following advantages:

Offers high capacity for carrying broadband traffic.

Enables up to 100-km transmission of GE services, satisfying the long distance

transmission requirement in remote areas, thanks to ITU-T G.709-compliant FEC.

Supports ITU-T G.709-compliant GCC management and communicates with the central

node through the ESC in the remote areas, cost-optimized NMS solution.

Interoperable with Huawei SDH and WDM equipment and thus eliminate the need for

DCN in remote areas.



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Product Overview



Issue 01 (2011-07-05)

Central node

B (town 1)

Central node

C (town 2)

Central node

D (town 3)

Central node

E (town 4)

Central node

M (town n)

GE

Gigabit

Ethernet

switch

MASAN

Government

OLT Net bar

VIP

customers

OptiX OSN 1800

Central node A

(country)

PON Service Distance Extension

The OptiX OSN 1800 series provide Ethernet passive optical network (EPON) and Gigabit

passive optical network (GPON) service interfaces, to meet the demands on fiber quantity and

capacity. of PON On the other hand, as WDM can transport longer, the ONUs can be

deployed further from the OLT and hence enlarged PON coverage. The LOS/LOF alarm

detection is also provided for easy fault locating in the network.

In terms of end-to-end GPON service OTN distance extension, the OptiX OSN 1800

series realize a transmission distance of 50 km in a single span.

In terms of end-to-end EPON service OTN distance extension, the OptiX OSN 1800

series realize a transmission distance of 35 km in a single span.

Figure 3-1 shows the application scenarios of the PON service distance extension scheme

provided by the OptiX OSN 1800 series. In the scheme, specific boards are used to transmit

ONU and OLT signals. Upstream and downstream PON service signals are transparently

transmitted and end-to-end transmission of services is achieved in the network.


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3-7

Figure 3-1 PON service distance extension

Large-Granularity Private Line Service

OptiX OSN 1800 series ensures quick provision and delivery of the private line service. The

OptiX OSN 1800 series has the following features:

Mainly carries large-granularity private line services, such as the GE, ODU0, 10GE LAN,

10GE WAN, STM-64/16/4/1, FC100, FC200, FICON, FICON Express, ESCON, λ

(leased wavelength), OTU1 and OTU2/OTU2e services.

Also carries small-granularity and low-rate private line services (such as FE) and thus

carries private line services of multiple granularities on a single network. This reduces

the number of equipment resources and the maintenance cost.

Has a compact design and normalized configuration of Any service ports, supports quick

deployment.

Realizes the end-to-end solution by working with Huawei WDM equipment and thus

reduces back-to-back OTMs. Thus, it reduces cost but has high reliability.



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Product Overview



Issue 01 (2011-07-05)

Figure 3-2 Large-granularity private line service

Core

DWDM/OTN

OptiX OSN

1800

OptiX OSN

1800

GE FC ESCON GE FC ESCONSTM-N/

OC-N

STM-N/

OC-N

… …

Finance

Office

building

Enterprise

Government

Finance

Office

building

Enterprise

Government

ODU0-Based Flexible Grooming and Management of GE Services

The ODU0 encapsulation in OptiX OSN 1800 series improves transmission efficiency for

services at a rate lower than 2.5 Gbit/s, and achieving:

Arbitrary add and drop of the ODU0-encapsulated GE services at another OptiX OSN

8800 T16 station by interconnecting the OptiX OSN 1800 with an OptiX OSN 8800 T16

station.

Arbitrary add and drop of the GE services at an OptiX OSN 8800 station by

interconnecting the OptiX OSN 1800 with an OptiX OSN 8800 T16 station.

Figure 3-3 ODU0-based flexible grooming and management of the GE services

OptiX OSN

1800

OptiX OSN

1800

GE-1

OptiX OSN

1800

OptiX OSN

8800

ODU0

GE-2

GE-1

GE-3

GE-3

GE-2

OptiX OSN 6800/

OptiX OSN 8800 T16

GE Service

Flow

Mobile Broadband Backhaul

For base stations that a small number of FE/GE services emerge, the FE/GE services can be

directly accessed to the OptiX OSN 1800 series and no extra SDH/PTN equipment is

required.

In this case, the FE/GE services skip the central convergence nodes and travel directly from

the edge node to the MAN node.


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3-9

Figure 3-4 GE services from base stations carried over mobile broadband

Base

station

FE/GE

Service

FE/GE

Service

FE/GE

ServiceOptiX OSN

1800Base

station

Base

station

IPTV Network

The IPTV network is constructed in the ring network. A central node sends services to several

edge nodes at the same time. The services can be wavelength services or sub-wavelength

services. In this way, bidirectional transmission of data services is realized.

The IPTV network has the Drop and Continue feature. In the IPTV network, the uplink

service traffic is low. The large service traffic in the downlink, such as TV program signals, is

duplicated at the program source node and then transmitted through special GE channels in

the two directions of the ring network. At each program receiving node, the service traffic is

downloaded, and passed through to other program receiving nodes in the downlink. In this

way, the broadcast or multicast function of TV program signals is realized.

Figure 3-5 IPTV network and service plan

Program

source node

Program

receive node

OptiX OSN 1800

Protection service of

each other

Program

receive node

Program

receive node

Program

receive node

Program

receive node

Program

receive node



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Product Overview



Issue 01 (2011-07-05)

Full-Service Operation

As rich network resources are available, a station can be shared on the access layer. The

WDM equipment provides a large channel for full services and thus enables fast service

provision. In addition, the WDM equipment features long-distance service transmission,

which helps reduce the equipment room, equipment, and interfaces at the edges of the MAN.

In this manner, the TCO is reduced to a great extent.

Accesses services at a rate ranging from 1.5 Mbit/s to 10 Gbit/s, and transmits both the

large-granularity broadband services and small-granularity services. That is, the OptiX

OSN 1800 series can access full services and effectively lower the equipment cost.

Enables long-haul and large-capacity transmission without involving any convergence

node. This is the simplified networking characterized by larger capacity nodes and fewer

sites. In this networking mode, services are accessed at the endpoint and processed at the

central node. As a result, the number of equipment resources, interfaces, and equipment

rooms is decreased.

Supports ITU-T G.709-compliant OTN interfaces. This enables easy interconnection of

the OptiX OSN 1800 series with other equipment and facilitates the equipment

management. In addition, the OptiX OSN 1800 series can work with Huawei

WDM/OTN equipment to form an end-to-end network.

Figure 3-6 Full-service operation

FTTxSAN LAN/DSL

OLT BRAS SR RNC/BSCMetro core and backbone

Metro edge

Access network

MSTP/PTN

OptiX OSN

1800

GE

2G,3G,LTE

1310 nm

Access of all

services on

the same site

Centralized

configuration and

management of

service equipment

FiberNetwork

cable

Twisted

pair cable


Transport Platform

Product Overview 4 Product Features



4-1

4 Product Features

4.1 Network Level Protection

The product provides various network level protection schemes to enhance the system

reliability.

Table 4-1 Service protection mechanism and application scenarios of the OptiX OSN 1800 series

(WDM protection)

Protection Type Application Scenario

Optical line

protection

It protects the entire fiber line.

It uses the dual fed selective receiving function of the OLP board

and the diverse routing to provide protection for line fibers between

the adjacent stations.

Intra-board

wavelength

protection

It protects a single OTU board with the dual fed selective receiving

function and protects a single OTU board with only one group of

WDM-side transmit and receive optical ports. It also protects a

single OTU board with the single fed single receiving function with

the OLP board that provides the dual fed selective receiving

function.

It uses the dual fed selective receiving function of a single OTU

board and the diverse routing to provide protection for a service by

adopting two different wavelengths.

Client 1+1

protection

It protects the OTU board.

It is implemented by the SCS board or the OLP board.

It protects a single client-side service or a single channel.

SW SNCP

protection

It protects the OTU board with convergence and cross-connection

function that can configure cross-connection and protection for

individual client-side services.

ODUk SNCP

protection

It uses the dual fed and selective receiving function of the electrical

layer grooming to protect the OCh fibers. The cross-connect

granularity is ODU0 signals, ODU1 signals, ODUflex signals and

ODU2 signals.

4 Product Features


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Product Overview



Issue 01 (2011-07-05)


(SDH protection)


Sub-Network

Connection

Protection (SNCP)

Utilizes the dual fed and selective receiving function of the

cross-connections at the electrical layer. Services are dual transmitted

at the source and selectively received at the sink.


(Ethernet protection)


ERPS This protection type is based on the traditional Ethernet mechanism

and uses the ring network automatic protection switching (R-APS)

protocol to achieve quick protection switching in the Ethernet ring

network.

LAG In this protection mode, multiple links between two nodes are

bundled together to get higher bandwidth and improve link reliability.

MSTP In the case of the Ethernet user network where loops exist, the MSTP

generates the tree topology according to VLAN IDs of the Ethernet

packets. Thus, the broadcast storm is avoided and the network traffic

is balanced according to the VLAN IDs of the Ethernet packets.

Overview

The OptiX OSN 1800 series provide the status monitoring function of the protection

mechanism and the detecting function of the protection switching, reliability and resource

availability so as to enhance the network reliability.

There are five protection switching commands, clear switching, locked switching, forced

switching, automatic switching and manual switching, arranged by priority from high to low.

Automatic switching is triggered by the system upon internal switching conditions. Locked

switching, forced switching and manual switching are externally issued on the U2000 as

means to test and maintain the system. A clear switching command can be issued on the

U2000 to clear the preceding three external switching commands.

ODUk SNCP Protection

TNF2ELOM, TNF2LQM, TNF2LQM2, TNF2LSX, and TNF1LDX board support the ODUk

SNCP protection.

The ODUk SNCP provides protection for topologies such as ring with chain, tangent rings,

and intersecting rings. This ensures high flexibility in application. An ELOM board is used as

an example to illustrate the working principle of ODUk SNCP protection.


Transport Platform




4-3

Working

Channel

Protection

Channel

Source

End

ELOM 1 ELOM 2

ODUk

Cross-

connect

IN1/OUT1

IN2/OUT2

RX/TX RX/TX

IN1/OUT1

IN2/OUT2

Sink End

ODUk SNCP Protection(Normal)

ODUk

Cross-

connect

Working

Channel

Protection

Channel

Source

End

ELOM 1 ELOM 2

ODUk

Cross-

connect

IN1/OUT1

IN2/OUT2

RX/TX RX/TX

IN1/OUT1

IN2/OUT2

Sink End

ODUk SNCP Protection(Switch)

ODUk

Cross-

connect

When the working channel fails, the SNCP switching is implemented as follows:

Before the switching, the source end (ELOM1 board) sends the service signal to the sink

end (ELOM2 board) through both the working channel and protection channel.

When detecting that the signal of the working channel fails, the ELOM2 board reports

the channel signal failure event to the system control board.

The system control board of the sink end checks and ensures that the signal of the

working channel fails but the signal of the protection channel is normal. Then, the

ELOM2 board completes the cross-connection between the protection channel and the

service sink. In this manner, the ELOM2 board receives the service from the protection

channel.

4.2 Features of WDM Transmission Technology

4.2.1 OTN Technology

The product uses the OTN monitoring architecture.

The OptiX OSN 1800 series fully support the OTN technologies. Key technologies are as

follows:

Client service mapping: For customer services whose mapping process has been defined

by Recommendation G.709, the OptiX OSN 1800 series adopt mapping process that is

completely compliant with the Recommendation. These services include SDH services

and Ethernet services. The virtual concatenation technology can be used to map 10GE

services into ODU1-Xv. When the service rate is less than the ODU1, the ODU1 is

equally divided into 16 timeslots to carry the services. Services at different rates are

allocated with different amount of time slots. For example, one time slot carries STM-1

service; four time slots carry STM-4 service; six time slots carry FC100 service. The

division of OTN payload domain improves the utilization of ODU channels.

Channel mapping: The OptiX OSN 1800 series support the mapping of ANY services,

OPU1, ODU0, ODU1 and OTU1 layer by layer in the upstream and downstream

directions.

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OAM: The OptiX OSN 1800 series fully support all kinds of administrative overhead

defined by Recommendation G.709. It utilizes GCC byte for ESC management. GCC0,

GCC1, and GCC2 can be chosen to transmit the management information. SM, PM

performance monitoring and reporting is supported. It supports ODUk PM signals

processing. FEC and correction result reporting is supported.

With OTN-related technologies, the OptiX OSN 1800 series have technical advantages in the

following aspects:

It adopts OPUk container to achieve real transparent adaptation and transmission of any

client services without changing any payload or overhead. It also provides effective

management and service quality monitoring. In addition, it can be compatible with

possible new services in the future.

It adopts asynchronous mapping and multiplexing so that networkwide synchronization

is no longer needed. This eliminates the limitation on synchronization and simplifies the

system design.

With the asynchronous mapping and multiplexing of ODU0 channel, the sub-rate

services can be flexibly groomed between different OCh channels and the client-side

ports. This meets the need for both high utilization of wavelength bandwidth and flexible

end-to-end grooming.

With the standard FEC by the OTN, it achieves a maximum of 6.2 dB (BER=10E-15)

coding gain. The OSNR tolerance of the optical channel is decreased in this way. In

addition, the distance between electrical regenerators are extended with less system

nodes. This can increase the budgetary optical power gain of the OptiX OSN 1800.

4.2.2 Link Pass Through

When the overhead byte supporting the link state pass through (LPT) protocol is added to the

frame format of the WDM side signals, the system can monitor the running status of the

network access point or the service network.

Normally, the OTU board at the upstream station transmits the LPT protocol information that

indicates normal WDM side transmission line to the OTU board at the downstream station.

When the status of the upstream WDM side transmission line changes, for example, a fault

occurs or a fault is removed, the OTU board at the upstream station transmits the LPT packet

that indicates network status change to the OTU board at the downstream station. When the

downstream station knows that the status of the transmission line changes, it enables or

disables the standby transmission line to ensure that services on the transmission line are

available.

LPT is mainly used to implement two functions: one is monitoring of service network

operation status, and the other is monitoring of access point operation status.

4.3 Optical Power Management

The OptiX OSN 1800 product supports the automatic gain control (AGC) function.

4.3.1 Introduction to AGC

The automatic gain control (AGC) function locks channel gain regardless of the number of

optical wavelengths transported in a fiber. Adding or dropping one or more channels or optical

signal fluctuation does not affect the signal gain of other channels.


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The Erbium-doped fiber amplifier (EDFA) adopted by the system works in the mode of gain

locking. In this mode, the output optical power of the amplifier changes with the input optical

power and the gain is maintained. That is, when the number of wavelengths changes, the

power adjustment time is within 1 ms in the gain locking mode so that the optical power of

other channels remains unaffected and the burst bit error can be avoided during the process of

adding or dropping wavelengths.

The EDFA adopted by the system works in the mode of gain locking. The amplifier is

embedded with the forward and backward feedback control loops, which dynamically respond

to the change of input optical power. When the change is less than 1 dB, the backward

feedback control loop is enabled to control the power precisely. When the change is more than

1dB, the forward feedback control loop is enabled to adjust the power rapidly.

By virtue of the gain locking mode, the system can transmit a single wavelength of signals

and also add or drop wavelengths without affecting services. Due to the embedded

suppression mechanism of the amplifier, if the services suddenly change or the amplifier

degrades over a certain hop, the services over other hops are not affected.

In the extreme situation where only one wavelength is normal and other wavelengths

disappear in the system, the AGC function can ensure that the services over this wavelength

are not affected. A 16-wavelength system is used as an example to illustrate the AGC

function.

In the 16-wavelength system, the transmitting optical power of each channel is +5 dB.

When 15 of the 16 wavelengths disappear, the remaining one is not affected.

The gain locking mode is more effective than the power locking mode in terms of power

efficiency, because the pump optical power is always exported according to the utmost

capacity of the system, regardless of the actual number of working wavelengths.

When the number of wavelengths is changing, AGC would ensure the optical power of remain

channels is not affected. It helps to avoid an outburst of bit errors during adding or dropping

channels from the main stream.

4.4 Physical Clock

OptiX OSN 1800 supports SDH clock synchronization and Synchronous Ethernet Clock.

4.4.1 SDH Clock Synchronization

SDH clock synchronization is a traditional clock synchronization technology, which ensures

transmission quality of SDH services.

The OptiX OSN 1800 extracts the timing signals by the following methods:

Extracts 2M timing signals from the external clock port of an NE

Timing signals extracted from optical signals that the TSP board receives

The OptiX OSN 1800 supports input and output of one 120-ohm external clock source.

The OptiX OSN 1800 supports three clock working modes, that is, the tracing, holdover, and

free-run modes. The timing signals from optical signals that the line board receives and 2

Mbit/s timing signals also process and transfer synchronization status messages (SSMs).

The SDH clock has the following features:

The synchronous physical clock can be easily achieved and is highly reliable.

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The synchronous physical clock adopts the SSM information to indicate clock quality

and exclusive SDH overheads to transfer the SSM.

4.4.2 Synchronous Ethernet Clock

The synchronous Ethernet clock is a technology of frequency synchronization over the

physical layer, which is similar to the SDH clock.

The LEM18 board for the OptiX OSN 1800 supports synchronization Ethernet clock. The

LEM18 board can extract clock information such as clock frequency and SSM information at

the GE, 10GE, and OTU2 ports.

The synchronization Ethernet clock has the following features:

No external clock source is supported.

The physical-layer clock can be directly extracted at ports and the QoS of the clock

satisfies the requirement.

The physical-layer clock adopts the SSM information to indicate clock quality and

exclusive Ethernet packets or OTN overheads to transfer the SSM information.

To provide the synchronous Ethernet clock, each NE that the synchronization

information traverses must support the synchronous Ethernet technology.

4.4.3 PTP Clock (IEEE 1588 v2)

A Precision Time Protocol (PTP) clock complies with the IEEE 1588 v2 protocol and can

realize synchronization of frequency and time.

IEEE 1588 v2 is a synchronization protocol, which realizes frequency and time

synchronization based on the timestamp generated during the exchange of protocol packets. It

provides the nanosecond accuracy to meet the requirements of 3G base stations.

To achieve PTP clock synchronization, all NEs on the clock link should support the IEEE 1588 v2

protocol.

BMC Algorithm

For the PTP clock, the best master clock (BMC) algorithm is adopted to select the clock

source.

The best master clock (BMC) algorithm compares data describing two or more clocks to

determine which data describes the better clock, and selects the better clock as the clock

source. The BMC algorithm includes the following algorithms:

Data set comparison algorithm: The NE determines which of the clocks is better, and

selects the better clock as the clock source. If an NE receives two or more channels of

clock signals from the same grandmaster clock (GMC), the NE selects one channel of

the clock signals that traverses the least number of nodes as the clock source.

State decision algorithm: The state decision algorithm determines the next state of the

port based on the results of the data set comparison algorithm.

Clock Architecture

There are three models for the IEEE 1588 v2 clock architecture.


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OC (Ordinary Clock): A clock that has a single IEEE 1588 v2 port and the clock needs to

be restored. It may serve as a source of time (master clock), or may synchronize to

another clock (slave clock).

BC (Boundary Clock): A clock that has multiple IEEE 1588 v2 ports and the clock needs

to be restored. It may serve as the source of time, (master clock), and may synchronize to

another clock (slave clock).

TC (Transparent Clock): A device that measures the time taken for a PTP event message

to transit the device and provides this information to clocks receiving this PTP event

message. That is, the clock device functions as an intermediate clock device to

transparently transmit the clock and process the delay, but does not restore the clock. It

can effectively deal with the accumulated error effects resulting from the master and

slave hierarchical architecture. In this manner, the TC ensures that the clock/time

synchronization precision meets the application requirement.

The TC is classified into peer-to-peer (P2P) TC and end-to-end (E2E) TC according to

the delay processing mechanism.

− P2P TC: When the PTP packets are transmitted to the P2P TC, the P2P TC corrects

both the residence time of the PTP packets and the transmission delay of the link

connected to the receive port. The P2P TC is mainly used in the MESH networking.

− E2E TC: When the PTP packets are transmitted to the E2E TC, the E2E TC corrects

only the residence time of the PTP packets. The E2E delay computation mechanism

between the master and slave clocks is adopted. The intermediate nodes do not

process the transmission delay but transparently transmit the PTP packets. The E2E

TC is mainly used in the chain networking.

OptiX OSN 1800 can support the OC, BC, TC, TC+OC, BC + physical-layer clock, and

TC+BC at present.

4.5 Data Characteristics

The OptiX OSN 1800 supports the Ethernet features.

4.5.1 Service

The OptiX OSN 1800 supports Ethernet services refer to Table 4-4.

Table 4-4 Types of Ethernet services

Service Type Definition Features

EPL services Ethernet Private

Line services

EPL services are transparently transmitted in a point-to-point manner.

The physical links carrying EPL services are independent of each other

and EPL services do not share bandwidth among themselves.

EPL services are applicable to users working in banks or stock exchange

centers, who require high security and QoS.

EVPL services Ethernet Virtual

Private Line

services

EVPL services are converged from multiple points to one point. EVPL

services share bandwidth and are identified and separated by tags such

as VLAN IDs.

EVPL services are applicable to enterprise users, who require high QoS.

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Service Type Definition Features

EPLAN

services

Ethernet private

LAN services

EPLAN services are transmitted in a multipoint-to-multipoint manner.

They do not share bandwidth among themselves.

The physical links carrying EPLAN services are independent of each

other and EPLAN services enable interconnection among LANs set up

for enterprise users.

EVPLAN

services

Ethernet virtual

private LAN

services

EPLAN services are transmitted in a multipoint-to-multipoint manner.

They share bandwidth among themselves.

EVPLAN services identify data of different users using the VLAN or

QinQ mechanism and enable interconnection among LANs set up for

enterprise users.

4.5.2 QoS

Quality of service (QoS) defines the expected class of service, in terms of the bandwidth,

delay, delay variation, and packet loss ratio, which should be guaranteed under all

circumstances in a communication network. This ensures that the request and response of an

application meets the expected class of service.

On a traditional IP network, all packets are treated in the same way. Every router adopts the

first in first out (FIFO) policy to process packets, and makes its best effort to transmit packets

to the destination; however, the packet transmission performances such as the reliability and

delay are not ensured.

To support voice, video, and data services that have different service requirements, a network

must be able to differentiate communication types and thus provide relevant service.

In the case of the transmission where prioritized queues are used to support QoS, sets one of

the egress queues as a strict-priority (SP) queue, so that packets in this queue are always

groomed with the highest priority. This setting meets the requirements of key service packets.

The other egress queues adopt the weighted round robin (WRR) grooming algorithm so that

packets in each queue can obtain a certain period of service.

The Ethernet service processing boards provide the QoS function. By providing dedicated

bandwidths, lowering the packet loss ratio, and reducing the packet transmission delay and

delay jitter, the QoS function helps provide different classes of service for different customers.

The QoS function complies with the following standards: IETF RFC2697, RFC2698,

RFC2309, RFC2597, RFC2598, and IEEE802.1p.

4.5.3 Protection

The OptiX OSN 1800 provides layered protection for Ethernet services. For details refer to

Table 4-3.

4.5.4 Administration and Maintenance

The OptiX OSN 1800 provides equipment-level and network-level administration and

maintenance, which can be implemented by using the U2000. The following mainly describes

the administration and maintenance schemes at the equipment level.


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ETH-OAM

The Ethernet operation, administration, and maintenance (ETH-OAM) function improves the

Ethernet Layer 2 maintenance method and provides powerful maintenance function for

service continuity check, deployment commissioning, and network troubleshooting.

The Ethernet processing board of the OptiX OSN 1800 can implement the ETH-OAM

function, which complies with IEEE 802.1ag, and ITU-T Y.1731 standards. The combination

of the operation, administration, and maintenance provides a complete Ethernet OAM

solution, thus realizing automatic fault discovery and fault location.

The ETH-OAM function compliant with IEEE 802.1ag and ITU-T Y.1731 standards is

implemented in the following ways:

Link tracing (LT) test: used to locate faults at the faulty point.

Loopback (LB) test: used to test the bidirectional connectivity.

Connectivity check (CC) test: used to test the unidirectional connectivity.

For details about the ETH-OAM function, see the Feature Description.

RMON

The remote monitoring (RMON) function can monitor the transport network data of different

network segments.

The RMON function defines a series of statistical forms and functions to exchange data

between the control station and detection station that comply with the RMON standard. In this

manner, the RMON function is able to manage the Ethernet port. The RMON function

provides flexible detection modes and control mechanisms to meet the requirements of

different types of networks. In addition, the RMON function provides error diagnosis,

network planning, and reception of performance event information on a networkwide basis.

Flow Control

Flow control on Ethernet services is implemented by controlling the transmission rate of the

opposite equipment using Pause frames based on IEEE 802.3x standards.

For example, the OptiX OSN 1800 is configured with the bandwidth of 50 Mbit/s and the

opposite switch transmits packets to the OptiX OSN 1800 at the rate of 100 Mbit/s. In this

case, packets will be discarded because of insufficient bandwidth if flow control is not

configured. If flow control is configured, the OptiX OSN 1800 will send Pause frames to the

opposite switch after detecting insufficient bandwidth. Then the switch will reduce the

transmission rate to 50 Mbit/s to ensure normal packet transmission.

4.6 Features of Commissioning and Configuration

4.6.1 PRBS Error Detection Function

Some OTUs of the system provide the pseudo random bit sequence (PRBS) error detection

function.

By starting or stopping on the NM a PRBS bit error test at the client-side interface of the OTU,

the bit error test of the transmission link can be performed without attaching an extra meter to

the equipment during equipment deployment.

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This function can be realized by using the combination of the PRBS signal generator and

PRBS signal monitor. The PRBS signal generator of the OTU that supports PRBS bit error

detection generates and transmits PRBS signals. The PRBS signal monitor monitors the PRBS

codes transmitted from the PRBS signal generator and the PRBS codes looped back from the

opposite station. In other words, the PRBS signal monitor compares the transmitted signals

with the looped-back signals and determines whether the equipment or transmission line is

normal.

4.6.2 Service Package Configuration

Service package makes the configuration operation easily and fast.

When an NE of the OptiX OSN 1800 series is powered on for the first time, by default, the

service initially configured on the board. On site, the hardware installation personnel only

need to commission the optical power to the normal value. After the equipment is running

normally, according to the application scenario of the NE, the user can remotely issue

commands on the NM to configure the service on the board of the NE.

In addition, the NM software for the product provides the quick configuration wizard with

which the NE time synchronization and performance monitoring can be configured. In the

case of the typical configuration, the quick configuration wizard enables you to complete the

one-touch service configuration simply by selecting the service package.

The LQM, LQM2 and LWX2 boards of the OptiX OSN 1800 series support the following

one-touch service application scenarios:

GE transparent transmission

GE/STM-1 hybrid transmission

4.6.3 End-to-End Service Configuration

The system provides the function of managing end-to-end OTN service configurations, which

helps simplify the configuration process. This function helps shorten the network deployment

time and implement automatic management of a network.

When configuring an end-to-end OTN service, you can create a service trail that traverses

different layers and directly create a client service trail. You do not need to know how the

service grooming between the OTN layers is implemented and create an ODU0/ODU1 server

trail at each layer. After you create a client service, the client service trails at different OTN

layers are generated automatically. This simplifies the service configuration process.

The end-to-end OTN service configuration includes creating, querying, deleting, and

modifying an end-to-end service and optimizing an end-to-end service. The latter is also

known as service defragmentation.

4.7 Features of Installation and Commissioning

The OptiX OSN 1800 series provide the following features, which simplifies the installation,

commissioning, and configuration operations.

4.7.1 Small Form-Factor Pluggable Module

There are four types of pluggable modules: the small form-factor pluggable (SFP), Small

Form-factor Pluggables Plus (SFP+), the 10 Gbit/s small form-factor pluggable (XFP) and the

tunable 10 Gbit/s small form-factor pluggable (TXFP).


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The small form-factor pluggable modules are used on the client side and WDM side of some

OTU boards. When the type of the accessed service is changed or the module is faulty, replace

only the module rather than the board.

The TXFP module supports wavelength adjustment, which significantly reduces costs of spare

parts and inventories.

4.7.2 Legible Wavelength Information Label

The small form-factor pluggable (SFP) modules on the optical transponder boards can be

identified by the label of the wavelength number. And the APD modules or PIN modules

used in the receivers of the optical transponder boards are distinguished by colors. In these

ways, the types of interfaces are very clear in the on-site commissioning.

4.7.3 Fiber/Cable Interface Safety Design

Different fibers and cables of the product use different ports.

The ports are very different in appearance. In addition, cable labels are used to indicate the

types of the cables. Hence, the installation position of every cable is clear. The cable ports of

the OptiX OSN 1800 series are designed to prevent mis-insertion.

The installation of cables cannot be complete if the cables are inserted reversely or improperly.

If a cable is inserted improperly, no damage may occur in the equipment even when the

equipment is powered on. In this way, no serious damage may be generated.

4.8 Master and Slave Shelves

The OptiX OSN 1800 series support master and slave shelves. When multiple chassis are

required on one NE, the master and slave shelves are cascaded for uniform management of

these shelves. In master-slave shelf mode, multiple chassis are displayed as one NE on the

NMS. The OptiX OSN 1800 series support one master shelf managing a maximum of six

slave shelves.

The OptiX OSN 1800 in master-slave shelf mode can form a ring network or a chain network.

The ring network is recommended.

4.9 Operation and Administration

The OptiX OSN 1800 supports data communication network (DCN) communication,

automatic laser shutdown (ALS), and intelligent fibers.

4.9.1 DCN

The WDM equipment supports the OSC and the ESC technologies to bear the embedded

control channel (ECC) to implement the DCN.

The ECC is used to implement the operation, administration, and maintenance (OAM)

communication function between NEs. The ECC is established on the data communications

channel (DCC). For the SDH equipment, the ECC is carried on the section overhead bytes

D1-D12. Generally, the regenerator section overhead bytes D1-D3 are used. For the WDM

equipment, the ECC is carried on the OSC or ESC supervisory channel.

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The communication of Huawei ECC is implemented in the following ways:

HWECC protocol (a proprietary protocol of Huawei)

The protocol is used when only Huawei equipment is involved in the networking or

when Huawei equipment does not need to interwork with equipment of other vendors to

exchange the OAM information.

IP over DCC protocol (a standard protocol)

The protocol is used when Huawei equipment interworks with equipment of other

vendors to exchange the OAM information.

OSI over DCC protocol (a standard protocol)

The protocol is used when Huawei equipment interworks with equipment of other

vendors to exchange the OAM information.

Huawei equipment supports all the previous protocol stacks. The HWECC protocol is

supported by default. The IP over DCC protocol or OSI over DCC protocol is supported

selectively depending on the networking.

4.9.2 Automatic Laser Shutdown

The OTU boards of the product provide the automatic laser shutdown (WDM ALS) function.

With the ALS function, the OTU board can automatically shut down or turn on the laser based

on the condition of the input optical signals to prevent personal injury.

The ALS function applies to the client side and WDM side of the OTU board. This function

can be enabled or disabled through the network management system.

When no optical signals are input to the receive optical interface on the client side of the

opposite OTU board, the local OTU board automatically shuts down the laser for the

output optical interface on the corresponding client side.

When no optical signals are input to the receive optical interface on the WDM side of the

OTU board, the OTU board automatically shuts down all the lasers for the output optical

interface on the client side with the ALS function enabled.

4.9.3 Intelligent Fiber

The OTU board of the product provides the intelligent fiber (IF) function. With the IF

function, the OTU board can automatically insert maintenance code streams to the client-side

optical interfaces on the downstream board in the case of an input fault on the client or WDM

side of the upstream board. Then the fault information can transfer to the client side of the

downstream board.

The IF function is implemented by using the following methods:

IF function enabled

− When no optical signals are input to the receive optical interface on the client side of

the opposite OTU board, if the IF function at the corresponding transmit optical

interface on the client side of the local OTU board is enabled, the transmit optical

interface on the local board automatically inserts maintenance code streams.

− When no optical signals are input to the receive optical interface on the WDM side of

the OTU board or a fault is generated at the ODU or OTU layer, all transmit optical

interfaces with the IF function enabled on the client side of the OTU board insert

maintenance code streams.


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IF function disabled

− When no optical signals are input to the receive optical interface on the client side of

the opposite OTU board, if the IF function at the corresponding transmit optical

interface on the client side of the local OTU board is disabled, the transmit optical

interface on the local board inserts the K28.5 code stream.

− When no optical signals are input to the receive optical interface on the WDM side of

the OTU board or a fault is generated at the ODU or OTU layer, all transmit optical

interfaces with the IF function disabled on the client side of the OTU board insert the

K28.5 code stream.

4.10 Features of Upgrade and Maintenance

The product supports upgrade and maintenance features, such as software package loading,

hot patches, backup and restoration of NE configuration data, and fault data collection.

4.10.1 Software Package Loading

Software upgrade by package loading refers to a process in which all NE software and board

software of an NE are loaded at a time to replace the original software. This loading mode

avoids the repetitive loading actions for the boards one by one and thus improves the upgrade

efficiently.

Software package loading includes two modes: package upgrade mode and package diffusion

upgrade mode

When you adopt package upgrade mode, you can load all NE software and board

software on the NE at the same time, so that you need not repeat the operation of loading

software for one board at a time.

When you adopt package diffusion upgrade mode, the mode can be classified in to

board-level activation and NE-level activation. In the case of board-level activation, you

can use proper activation groups. This greatly improves the loading efficiency.

To ensure that the upgrade is successful, perform a physical check on the OptiX OSN 1800

series before the upgrade, such as checking NE alarms and NE software.

Software package loading has the following features:

The loading process is based on only the desired NE and is performed in one graphic

user interface (GUI).

The NE can be automatically managed. The software of the newly seated board is

automatically updated when it does not match the software of the NE. So the efficiency

of the software upgrade is improved.

Software package loading is an incremental loading process in which only the files that

need be updated are loaded.

Software package loading supports the rollback function. When the software or hardware

of the system is faulty, the loading fails, and the NE software is restored to the status

before loading.

Software package loading applies to the following scenarios:

Upgrade of NE software

Replacement of equipment software version

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4.10.2 Hot Patch

The product supports the hot patch technology.

Some equipment requires long-term uninterrupted operation. When a defect is located or a

new requirement needs to be applied to the equipment software, a process of replacing old

codes with new codes should be performed to rectify the defect or realize the new requirement,

without any service interruption. These new codes are referred to as a hot patch.

The hot patch technology has the following features:

The hot patch solves most of the software problems without affecting services.

The hot patch effectively decreases the number of software versions and prevents

frequent software version upgrade.

The hot patch operation does not affect services and can be performed remotely. The hot

patch also provides a rollback function. This helps to decrease the upgrade cost and to

avoid upgrade risks.

The hot patch can be used as an effective method for locating faults, and thus improves

the efficiency of solving problems.

4.10.3 Backup and Restoration of NE Configuration Data

The configuration data of the product can be backed up and restored in the Flash of the SCC

board on the local NE.

To ensure the security of the configuration data, the NMS software for the OptiX OSN 1800

series supports the backup of the configuration data (including the board configuration, clock

configuration and protection relations of the NE) remotely to the NMS database.

During the running of the equipment, if data loss occurs on the SCC board or the equipment

power fails, after the equipment is powered on, the user can operate the NE remotely through

the NMS software to restore the configuration data from the NMS to NE.

When an OptiX OSN 1800 NE resets for five times within 15 minutes, by default, the system

takes that the database of the NE is damaged, and thus the communication between the NE

and the NMS stops. In this case, by default, the NE enters the security mode. In this mode, the

user can remotely access the equipment through the NMS software. The system software can

be or upgraded through software package loading, and thus the NE data is restored. Hence,

on-site operations are avoided, and the maintenance cost is reduced.


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Product Overview 5 Technical Specifications



5-1

5 Technical Specifications

5.1 Wavelength and Frequency of Optical Channels

The wavelength and frequency of the product involve two types of systems, that is, DWDM

system and CWDM system.

Nominal Central Wavelength and Frequency of DWDM System

Table 5-1 Nominal Central Wavelength and Frequency of DWDM System

Frequency (THz) Wavelength (nm) Frequency (THz) Wavelength (nm)

192.1 1560.61 194.1 1544.53

192.2 1559.79 194.2 1543.73

192.3 1558.98 194.3 1542.94

192.4 1558.17 194.4 1542.14

192.5 1557.36 194.5 1541.35

192.6 1556.56 194.6 1540.56

192.7 1555.75 194.7 1539.77

192.8 1554.94 194.8 1538.98

192.9 1554.13 194.9 1538.19

193.0 1553.33 195.0 1537.40

193.1 1552.52 195.1 1536.61

193.2 1551.72 195.2 1535.82

193.3 1550.92 195.3 1535.04

193.4 1550.12 195.4 1534.25

193.5 1549.32 195.5 1533.47

193.6 1548.51 195.6 1532.68



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Product Overview



Issue 01 (2011-07-05)

Frequency (THz) Wavelength (nm) Frequency (THz) Wavelength (nm)

193.7 1547.72 195.7 1531.90

193.8 1546.92 195.8 1531.12

193.9 1546.12 195.9 1530.33

194.0 1545.32 196.0 1529.55

Nominal Central Wavelengths of CWDM System

Table 5-2 Nominal Central Wavelengths of CWDM System

Wavelength (nm) Wavelength (nm)

1471 1551

1491 1571

1511 1591

1531 1611

5.2 Chassis Specifications

Specifications include dimensions, power consumption, power supply and so on.

OptiX OSN 1800 I Chassis

Table 5-3 Technical specifications of ordinary OptiX OSN 1800 I (DC power-supply chassis)

Item Specification

Dimensions (Height x Width x Depth) 44 mm x 442 mm x 220 mm (1.7 in. x 17.4 in.

x 8.7 in.)

Weight (empty chassis) 4.5 kg (9.9 lb.)

Maximum power consumption 150 W

Rated current 3 A

Power supply -48 V to -60 V DC

Table 5-4 Technical specifications of ordinary OptiX OSN 1800 I (AC power-supply chassis)

Item Specification


x 8.7 in.)



Transport Platform




5-3

Item Specification

Typical power consumption 100 W

Rated current 1 A

Power supply 100 V to 240 V AC

Table 5-5 Technical specifications of OptiX OSN 1800 I chassis integrated with an FMT (DC


Item Specification


x 11.1 in.)



Rated current 3 A


OptiX OSN 1800 II Chassis

Table 5-6 Technical specifications of ordinary OptiX OSN 1800 II (DC power-supply chassis)

Item Specification


x 8.7 in.)

Weight (empty chassis) 7 kg (15.4 lb.)

Maximum power consumption 300 W

Rated current 6 A


Table 5-7 Technical specifications of ordinary OptiX OSN 1800 II (AC power-supply chassis)

Item Specification


x 8.7 in.)

Weight (empty chassis) 7 kg (15.4 lb.)


Rated current 2.5 A

Power supply 100 V to 240 V AC



Transport Platform

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Issue 01 (2011-07-05)

Table 5-8 Technical specifications of OptiX OSN 1800 II chassis integrated with an FMT (AC

and DC power-supply chassis)

Item Specification

Dimensions (Height x Width x Depth) 131.7 mm x 442 mm x 283 mm (5.2 in. x 17.4 in.

x 11.1 in.)


Typical power consumption 300W(DC power-supply chassis)

200 W(AC power-supply chassis)

Rated current 6A(DC power-supply chassis)

2.5 A(AC power-supply chassis)

Power supply -48 V to -60 V DC(DC power-supply chassis)

100 V to 240 V AC(AC power-supply chassis)

OptiX OSN 1800 OADM Frame

Table 5-9 Technical specifications of the OptiX OSN 1800 OADM frame

Item Specification

Dimensions (Height x Width x Depth) 44 mm x 442 mm x 220 mm (1.7 in. x 17.4 in. x

8.7 in.)


Maximum power consumption <3.6 W

Rated current 0.3 A

Power supply 12 V DC

5.3 Main Optical Path Specifications

This section describes the characteristic of the optical port at points MPI-S or S' and MPI-R or

R' as well as the main optical path parameters.

A 16-channel system carrying 2.5 Gbit/s or 10 Gbit/s signals supports a maximum of 1×36 dB

for a single span.

Table 5-10 Main optical path parameters of the DWDM system (G.652 fiber) (with amplifiers)

Item Unit Performance Parameter

Span of line - 7×22 dB 6×22 dB 6×22 dB 5×22 dB

Number of channels - 16 16 40 40

Maximum bit rate of

channel

Gbit/s 2.5 10 2.5 10


Transport Platform




5-5


Optical port at points MPI-S and S'

Channel output power dBm ≥1 dBm ≥1 dBm ≥1 dBm ≥1 dBm

Maximum total output

power

dBm 17 17 20 20

Maximum channel

power difference at

point MPI-S

dB 8 8 4 4

Optical path (MPI-S - MPI-R)

Maximum optical path

penalty

dB ≤2 ≤2 ≤2 ≤2

Line dispersion

tolerance

- 11200 ps/nm 9600 ps/nm 9600 ps/nm 8000 ps/nm

Maximum discrete

reflectance

dB -27 -27 -27 -27

Optical port at points MPI-R and R'

Receiver sensitivity of

each channel

dBm -30 dBm (2.5

Gbit/s APD)

-22 dBm (10

Gbit/s APD)

-30 dBm (10

Gbit/s APD)

-26 dBm (10

Gbit/s APD)

-21 dBm (2.5

Gbit/s PIN)

-16 dBm (10

Gbit/s PIN)

-20 dBm (10

Gbit/s PIN)

-19 dBm (10

Gbit/s PIN)

Minimum channel

optical signal-to-noise

ratio at point MPI-R

dB 15 20 15 20

Maximum channel

power difference at

point MPI-R

dB 10 10 6 6

Table 5-11 Main optical path parameters of the CWDM system (G.652 fiber)


Span of line - 1x27 dB 1x21 dB 1x16 dB 1x16 dB

Number of channels - 8 8 2 8

Maximum bit rate of

channel

Gbit/s 2.5 5 10 10

Optical port at points MPI-S and S'

Channel output power dBm ≥2 dBm ≥3 dBm ≥0 dBm ≥0 dBm

Maximum total output

power

dBm 14 17 7 13



Transport Platform

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Issue 01 (2011-07-05)


Maximum channel

power difference at

point MPI-S

dB 5 5 5 5

Optical path (MPI-S - MPI-R)

Maximum optical path

penalty

dB ≤2 ≤2 ≤2 ≤2

Line dispersion

tolerance

- 2000 ps/nm 1400 ps/nm 1200 ps/nm 1200 ps/nm

Maximum discrete

reflectance

dB -27 -27 -27 -27

Optical port at points MPI-R and R'

Receiver sensitivity of

each channel

dBm -30 dBm (2.5

Gbit/s APD)

-24 dBm (5

Gbit/s APD)

-24 dBm (10

Gbit/s APD)

-24 dBm (10

Gbit/s APD)

-21 dBm (2.5

Gbit/s PIN)

Maximum channel

power difference at

point MPI-R

dB 5 5 5 5

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