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HUAWEI OptiX OSN 8800 T64/T32 Intelligent Optical Transport Platform. Product Description - part 11

Figure 5-8 Colorless & directionless scenario of the 3-degree ROADM application

5.2.6 4-Degree ROADM

On a 4-degree ROADM network, services can be transmitted in four directions. To smoothly

upgrade a network to one with over four degrees, configure RDU9+WSM9, WSD9+WSM9, or

WSMD9.

NOTE

The WSMD4 in the figure below can be replaced with the RDU9+WSM9, WSD9+WSM9 , or WSMD9.

Colored & Directioned Scenario

Local services are added to the WSMD4 board through the AM1 port and then transmitted to

the south through the OUT port. Services from the west, east, and north pass through the AM2,

AM3, and AM4 ports on the WSMD4 board, heading for the south.

In this scenario, to cross-connect services on NE1 in directions west, north, east, and south, four

groups of M40+D40 must be configured, so each group corresponds to one direction.

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Figure 5-9 Colored & directioned scenario of the 4-degree ROADM application

Colored & Directionless Scenario

Services on NE1 can be transmitted along paths in direction west, north, east, or south.

l To adjust the current path (for example, when services are adjusted or the protection path

is used in case of a faulty working path), manually configure optical cross-connections to

achieve flexible service grooming.

l On an ASON network, the rerouting function automatically finds a path and automatically

creates an optical cross-connection to ensure correct service transmission on NE1. In the

colored scenario, only the same wavelength can be used for service rerouting.

In this scenario, to cross-connect local services on NE1 in direction west, north, east, or south,

only one group of M40+D40 is required.

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Figure 5-10 Colored & directionless scenario of the 4-degree ROADM application

Colorless & Directionless Scenario

Services on NE1 can be transmitted along paths in direction west, north, east, or south.

l To adjust the current path (for example, when services are adjusted or the protection path

is used in case of a faulty working path), manually configure optical cross-connections to

achieve flexible service grooming.

l On an ASON network, the rerouting function automatically finds a path and automatically

creates an optical cross-connection to ensure correct service transmission on NE1. If a

wavelength-tunable OTU or line board is used in the colorless scenario, service

wavelengths can be flexibly converted during rerouting to avoid a wavelength congestion.

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Figure 5-11 Colorless & directionless scenario of the 4-degree ROADM application

5.2.7 9-Degree ROADM

On a 9-degree ROADM network, services can be transmitted in nine directions. Each node must

use RDU9+WSM9 boards, WSD9+WSM9 boards, or WSMD9 boards

Colored & Directionless Scenario

Services on NE1 can be transmitted along paths in nine directions.

l To adjust the current path (for example, when services are adjusted or the protection path

is used in case of a faulty working path), manually configure optical cross-connections to

achieve flexible service grooming.

l On an ASON network, the rerouting function automatically finds a path and automatically

creates an optical cross-connection to ensure correct service transmission on NE1. In the

colored scenario, only the same wavelength can be used for service rerouting.

In this scenario, to cross-connect local services on NE1 in direction 1 to direction 9, only one

group of M40+D40 is required.

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Figure 5-12 Colored & directionless scenario of the 9-degree ROADM application

Colorless & Directionless Scenario

Services on NE1 can be transmitted along paths in nine directions.

l To adjust the current path (for example, when services are adjusted or the protection path

is used in case of a faulty working path), manually configure optical cross-connections to

achieve flexible service grooming.

l On an ASON network, the rerouting function automatically finds a path and automatically

creates an optical cross-connection to ensure correct service transmission on NE1. If a

wavelength-tunable OTU or line board is used in the colorless scenario, service

wavelengths can be flexibly converted during rerouting to avoid a wavelength congestion.

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Figure 5-13 Colorless & directionless scenario of the 9-degree ROADM application

5.3 Transmission System

5.3.1 Integrated System and Open System Compatibility

The OptiX OSN 8800 can realize the compatibility of the integrated and open DWDM systems.

The open DWDM system is configured with OTUs to convert non-standard wavelengths into

ITU-T G.694.1-compliant wavelengths.

The integrated DWDM system does not need OTUs when its client-side equipment (for example,

the SDH equipment) has optical transmitter interfaces that comply with ITU-T G.694.1.

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l In the integrated DWDM system, if the optical specifications of the accessed signals of the

client equipment comply with the system specifications for the OptiX OSN 8800, the VOA

board, the MUX board with the built-in EVOA, or the ROADM board can be used to

equalize the optical power of the accessed signals.

l In the integrated DWDM system, the dispersion tolerance of the accessed signals of the

client equipment should not be smaller than the dispersion tolerance of the OTU board used

in the OptiX OSN 8800 to meet the requirement of the system dispersion compensation for

the transmission fiber.

l The integrated DWDM system is not recommended in view of factors such as equipment

operation, maintenance, and fault locating.

5.3.2 40 Gbit/s

The OptiX OSN 8800 provides a 40/80 x 40 Gbit/s transmission solution.

40 Gbit/s non-coherent transmission solution

Figure 5-14 shows the a typical application of the 40 Gbit/s non-coherent transmission

solution.

Figure 5-14 Typical application of the 40 Gbit/s transmission solution

OTU

40/80x40 Gbit/s

OTU

DCM

ODU3

Client

services

ODU2/ODU1/ODU0

T: Tributary boards

N: Line boards

5.3.3 3.1.5 10 Gbit/s, 40 Gbit/s, 100 Gbit/s Hybrid Transmission

With the emergence of service requirements, the existing 10 Gbit/s WDM transmission system

may be gradually upgraded to the 40 Gbit/s transmission system. When this occurs, the hybrid

transmission of the 40 Gbit/s and 10 Gbit/s signals becomes very important.

The OptiX OSN 8800 supports hybrid transmission of 10 Gbit/s signals, 40 Gbit/s non-coherent

signals, 40 Gbit/s coherent signals, and 100 Gbit/s coherent signals, and any of their

combinations. Thanks to this feature, the incumbent networks can be upgraded to ones with

larger capacity based on proper system designs of system performance parameters, protecting

operators' investments while addressing the increasing bandwidth demands. Figure 5-15 shows

hybrid transmission of 100 Gbit/s, 40 Gbit/s, and 10 Gbit/s signals.

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Figure 5-15 Hybrid transmission of 40 Gbit/s and 10 Gbit/s signals in the non-coherent system

10 Gbit/s

OTU

DCM

Client

services

40 Gbit/s

OTU

40 Gbit/s

T: Tributary boards

N: Line boards

5.3.4 Transmission Distance

l For 40 Gbit/s rate in the 40-wavelength system, a maximum of 20 x 22 dB transmission

without electrical regenerator is supported.

l For 40 Gbit/s rate in the 80-wavelength system, a maximum of 18 x 22 dB transmission

without electrical regenerator is supported.

l For 10 Gbit/s rate in the 40-wavelength system, a maximum of 32 x 22 dB transmission

without electrical regenerator is supported.

l For 10 Gbit/s rate in the 80-wavelength system, a maximum of 25 x 22 dB transmission

without electrical regenerator is supported.

l For 2.5 Gbit/s rate, a maximum of 25 x 22 dB transmission without electrical regenerator

is supported.

l For 10 Gbit/s rate system, supports a maximum of 1 x 82 dB single-span ultra long-distance

transmission.

l For the CWDM systems, a maximum of 80 km transmission distance is supported.

Huawei OSN series WDM equipment supports various links or spans based on different

modulation schemes for systems with diversified channel spacing.

Table 5-5 2.5 Gbit/s system span

Channel Spacing

Modulation Scheme

22 dB Span

100 GHz

NRZ

25 x 22 dB

Table 5-6 10 Gbit/s system span

Channel Spacing

Modulation Scheme

22 dB Span

100 GHz

DRZ

32 x 22 dB

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Channel Spacing

Modulation Scheme

22 dB Span

NRZ

27 x 22 dB

NRZ (XFP)

27 x 22 dB

50 GHz

DRZ

25 x 22 dB

NRZ

22 x 22 dB

NRZ (XFP)

22 x 22 dB

Table 5-7 40 Gbit/s system span

Channel Spacing

Modulation Scheme

22 dB Span

100 GHz

DQPSK

20 x 22 dB

50 GHz

ODB

8 x 22 dB

DQPSK

18 x 22 dB

5.4 Protection

The OptiX OSN 8800 T32/8800 T64 provides various types of equipment-level protection and

network-level protection.

5.4.1 Equipment Level Protection

The OptiX OSN 8800 T32 and OptiX OSN 8800 T64 provide cross-connect board 1+1

protection, SCC board 1+1 protection, STG board 1+1 protection, DC input protection,

redundancy protection for fans and inter-subrack communication protection.

5.4.1.1 Cross-Connect Board 1+1 Protection

The cross-connect board adopts 1+1 backup. It is recommended that active and standby cross-

connect boards be of the same type.

Service boards receive signals and process overheads. Then, the boards transmit the signals to

the active and the standby cross-connect boards. The active and the standby cross-connect boards

send the data after cross-connection to service boards. Service boards select the data from the

cross-connect boards. Configuration of the active cross-connect board is the same as the

configuration of the standby cross-connect board. The two boards are independent of each other.

Forcible switching can be performed between the two cross-connection boards without affecting

the existing services.

The cross matrix of the active cross-connect board is the same the cross matrix of the standby

cross-connect board. When the standby cross-connect board receives information about

abnormal active cross-connect board or when the NM system issues a switching command, the

standby cross-connect board takes over the work from the active cross-connect board, sets itself

to be in working status, and reports a switching event.

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There are two types of switching for the 1+1 protection switching of cross-connect boards:

l Automatic switching

When the service boards detect the abnormal status of cross-connect boards or buses, a

switching is performed automatically. The switching does not need to be performed

manually.

l Manual switching

When a switching is required in a test during the normal running of the active and the

standby cross-connect boards, the switching can be performed manually.

NOTE

When a switching occurs between the cross-connect boards, a switching also occurs between the active

and standby clock boards.

5.4.1.2 SCC Board 1+1 Protection

The SCC adopts 1+1 backup.

The service boards receive signals and process overheads. Then, the boards transmit the

overheads to both the active and the standby SCCs. The active and the standby SCCs send the

data after overhead processing to service boards. The service boards select the data according

to the status of SCCs. Configuration of the active SCC is the same as the configuration of the

standby SCC. The two boards are independent of each other.

The communication between SCCs and other boards is performed mainly through Ethernet.

When the status is normal, the data on service boards and the standby SCC is from the active

SCC. There is no inter-board communication between the standby SCC and service boards. Only

when the standby SCC is in the working mode, it has inter-board communication with other

boards.

When the active SCC is in normal status, the standby SCC is in backup status. When the standby

SCC receives information about abnormal active SCC or when the NM system issues a switching

command, the standby SCC takes over the work from the active SCC, sets itself to be in working

status, and reports a switching event.

There are two types of switching for the 1+1 protection switching of SCCs:

l Automatic switching

The SCC detects its own status through hardware or software. If it is in the abnormal status,

a switching is performed automatically. The switching is performed by the board and no

manual operation is required.

l Manual switching

When a switching is required in a test during the normal running of the active and the

standby SCCs, the switching can be performed manually.

5.4.1.3 STG Board 1+1 Protection

The clock board STG adopts 1+1 backup. The two STGs serve as mutual backups. When both

of them are normal, one of them functions as the active board, and the other functions as the

standby board. Service boards select the clock source according to the status of the two STGs.

When the active STG is faulty, an active/standby switching occurs. Then, the standby STG

becomes active, and the services boards select the clock from the current active STG according

to the status of the two STGs.

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Configuration of the active STG is the same as the configuration of the standby STG. The two

boards are independent of each other. When the active clock board is in abnormal state, the

standby clock board automatically takes over the work. Hence, there is no impact on the normal

operation of the equipment.

There are two types of switching for the 1+1 protection switching of STGs:

l Automatic switching

The STG detects its own status through hardware or software. If it is in the abnormal status,

a switching is performed automatically. The switching is performed by the board and no

manual operation is required.

l Manual switching

When a switching is required in a test during the normal running of the active and the

standby STGs, the switching can be performed manually.

NOTE

When a switching occurs between the clock boards, a switching also occurs between the active and standby

cross-connect boards.

5.4.1.4 OptiX OSN 8800 T64 DC Input Protection

The power supply system of an OptiX OSN 8800 T64 subrack uses eight power supply boards

to separately provide -48 V/-60V power inputs for the four sections of the subrack.

The power supply system supports eight -48 V/-60 V DC power inputs for mutual backup in

OptiX OSN 8800 T64 subrack. The subrack adopts switched-mode power supply scheme for

four areas which are shown in Figure 5-16. The area has the same color is defined as one area.

Each area is configured with a pair of power supplies in mutual backup (IU69 and IU78, IU70

and IU79, IU80 and IU88, and IU81 and IU89). The normal operation of the equipment is not

affected in the case of failure of any external input -48 V/-60 V power supply. Figure 5-16 shows

the four pairs of power supplies of mutual backup.

Figure 5-16 Power distribution and supply for the general 8800 T64 subrack

Front

Rear

IU91

IU93

SCC

STG

SCC

STG

PIU

EFI2

PIU

STI

ATE

PIU

IU69

IU70

IU71

IU74

IU75

I1IU

IU78

IU79

IU80

IU81

IU82

IU85

IU86

IU87

IU88

IU89

IU90

IU92

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