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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
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The information in this document is subject to change without notice. Every effort has been made in the
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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]
OptiX OSN 1800 Compact Multi-Service Edge Optical
Transport Platform
Product Overview Contents
Issue 01 (2011-07-05) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd
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
OptiX OSN 1800 Compact Multi-Service Edge Optical
Transport Platform
Product Overview 1 Introduction
Issue 01 (2011-07-05) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd
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
OptiX OSN 1800 Compact Multi-Service Edge Optical
Transport Platform
Product Overview
1-2 Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd
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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.
OptiX OSN 1800 Compact Multi-Service Edge Optical
Transport Platform
Product Overview 2 Hardware Architecture
Issue 01 (2011-07-05) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd
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)
2 Hardware Architecture
OptiX OSN 1800 Compact Multi-Service Edge Optical
Transport Platform
Product Overview
2-2 Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd
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.
OptiX OSN 1800 Compact Multi-Service Edge Optical
Transport Platform
Product Overview 2 Hardware Architecture
Issue 01 (2011-07-05) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd
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
power-supply chassis)
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
2 Hardware Architecture
OptiX OSN 1800 Compact Multi-Service Edge Optical
Transport Platform
Product Overview
2-4 Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd
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
OptiX OSN 1800 Compact Multi-Service Edge Optical
Transport Platform
Product Overview 2 Hardware Architecture
Issue 01 (2011-07-05) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd
2-5
Board Category Board Name Board Description
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
2 Hardware Architecture
OptiX OSN 1800 Compact Multi-Service Edge Optical
Transport Platform
Product Overview
2-6 Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd
Issue 01 (2011-07-05)
Board Category Board Name Board Description
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
Multiplexing Configuration Board
SBM4 Single Fiber Bidirectional Four Channel Optical Add/drop
Multiplexing Configuration Board
SBM8 Single Fiber Bidirectional Eight Channel Optical Add/drop
Multiplexing Configuration Board
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
OptiX OSN 1800 Compact Multi-Service Edge Optical
Transport Platform
Product Overview 3 Types and Scenarios of Service Access
Issue 01 (2011-07-05) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd
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.
3 Types and Scenarios of Service Access
OptiX OSN 1800 Compact Multi-Service Edge Optical
Transport Platform
Product Overview
3-2 Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd
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.
OptiX OSN 1800 Compact Multi-Service Edge Optical
Transport Platform
Product Overview 3 Types and Scenarios of Service Access
Issue 01 (2011-07-05) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd
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 .
3 Types and Scenarios of Service Access
OptiX OSN 1800 Compact Multi-Service Edge Optical
Transport Platform
Product Overview
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Copyright © Huawei Technologies Co., Ltd
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.
OptiX OSN 1800 Compact Multi-Service Edge Optical
Transport Platform
Product Overview 3 Types and Scenarios of Service Access
Issue 01 (2011-07-05) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd
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.
3 Types and Scenarios of Service Access
OptiX OSN 1800 Compact Multi-Service Edge Optical
Transport Platform
Product Overview
3-6 Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd
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.
OptiX OSN 1800 Compact Multi-Service Edge Optical
Transport Platform
Product Overview 3 Types and Scenarios of Service Access
Issue 01 (2011-07-05) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd
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.
3 Types and Scenarios of Service Access
OptiX OSN 1800 Compact Multi-Service Edge Optical
Transport Platform
Product Overview
3-8 Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd
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.
OptiX OSN 1800 Compact Multi-Service Edge Optical
Transport Platform
Product Overview 3 Types and Scenarios of Service Access
Issue 01 (2011-07-05) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd
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
3 Types and Scenarios of Service Access
OptiX OSN 1800 Compact Multi-Service Edge Optical
Transport Platform
Product Overview
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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
OptiX OSN 1800 Compact Multi-Service Edge Optical
Transport Platform
Product Overview 4 Product Features
Issue 01 (2011-07-05) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd
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.
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Table 4-2 Service protection mechanism and application scenarios of the OptiX OSN 1800 series
(SDH protection)
Protection Type Application Scenario
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.
Table 4-3 Service protection mechanism and application scenarios of the OptiX OSN 1800 series
(Ethernet protection)
Protection Type Application Scenario
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.
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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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Transport Platform
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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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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
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.)
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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
power-supply chassis)
Item Specification
Dimensions (Height x Width x Depth) 88 mm x 442 mm x 283 mm (3.5 in. x 17.4 in.
x 11.1 in.)
Weight (empty chassis) 8.3 kg (18.3 lb.)
Typical power consumption 150 W
Rated current 3 A
Power supply -48 V to -60 V DC
OptiX OSN 1800 II Chassis
Table 5-6 Technical specifications of ordinary OptiX OSN 1800 II (DC power-supply chassis)
Item Specification
Dimensions (Height x Width x Depth) 88 mm x 442 mm x 220 mm (3.5 in. x 17.4 in.
x 8.7 in.)
Weight (empty chassis) 7 kg (15.4 lb.)
Maximum power consumption 300 W
Rated current 6 A
Power supply -48 V to -60 V DC
Table 5-7 Technical specifications of ordinary OptiX OSN 1800 II (AC power-supply chassis)
Item Specification
Dimensions (Height x Width x Depth) 88 mm x 442 mm x 220 mm (3.5 in. x 17.4 in.
x 8.7 in.)
Weight (empty chassis) 7 kg (15.4 lb.)
Typical power consumption 200 W
Rated current 2.5 A
Power supply 100 V to 240 V AC
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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.)
Weight (empty chassis) 11.5 kg (25.3 lb.)
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.)
Weight (empty chassis) 4.5 kg (9.9 lb.)
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
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Item Unit Performance Parameter
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)
Item Unit Performance Parameter
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
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Item Unit Performance Parameter
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