HUAWEI OptiX OSN 8800 T64/T32 Intelligent Optical Transport Platform. Product Description - part 20
The FIU board separates optical supervisory signals and the main path signals from the received
line signals. The optical supervisory signals are sent to the optical supervisory units for
processing. The main path signals are amplified and sent to the TN13WSD9 board.
In Figure 6-13, the ITL board shown inside the dashed line frame is optional.
l If the ITL board is configured, the wavelengths that need to be dropped locally are output
to the ITL board through an interface on the TN13WSD9 board. The ITL board splits the
multiplexed signals into two groups: odd-numbered wavelength signals and even-
numbered wavelength signals. These two groups of signals are output to the OD (C-ODD)
and OD (C-EVEN) boards respectively.
l If the ITL board is not configured, the odd and even-numbered wavelengths that need to
be output locally are output to the OD (C-ODD) and OD (C-EVEN) boards respectively
through two interfaces on the TN13WSD9 board.
The OD (C-EVEN) board (or an OADM board) demultiplexes the group of multiplexed even-
numbered wavelengths into single even-numbered wavelengths that are sent to the local client
equipment through the OTU board. The OD (C-ODD) board demultiplexes the group of
multiplexed odd-numbered wavelengths into single odd-numbered wavelengths that are sent to
the local client equipment through the OTU board. The single wavelengths output from the
TN13WSD9 board are sent to the local client equipment directly through the OTU board.
The wavelengths that are not added/dropped locally pass through to the TN13WSM9 board.
The OM (C-EVEN) board (or an OADM board) multiplexes the locally added even signals into
one channel of even signals, and the OM (C-ODD) board multiplexes the locally added odd
signals into one channel of odd signals. These two channels of multiplexed signals are sent to
the TN13WSM9 board through two ports respectively, or are sent to the TN13WSM9 board
after being further multiplexed into one channel of signals by the ITL board. The locally added
signals can also be input to the TN13WSM9 board through the OTU board.
The wavelength input by the TN13WSM9 board is multiplexed with the pass-through
wavelength before optical amplification occurs. Then they are multiplexed with the processed
optical supervisory signals for line transmission.
Figure 6-13 shows the functional modules of this type of ROADM.
202
Figure 6-13 Schematic diagram of ROADM node with the WSM9 board and WSD9 board
West client-side
East client-side
O
O
O
O
O
O
O
O
O
O
T
T
T
T
T
T
T
T
T
T
U
U
U
U
U
U
U
U
U
U
(C-ODD)
(C-EVEN)
(C-ODD)
(C-EVEN)
OD
OD
OM
OM
ITL
ITL
OA
WSD9
WSM9
OA
West
East
line-side
FIU
FIU
line-side
ODF
SC2
ODF
OA
WSM9
WSD9
OA
ITL
ITL
OM
OM
OD
OD
(C-EVEN)
(C-ODD)
(C-EVEN)
(C-ODD)
O
O
O
O
O
O
O
O
O
O
T
T
T
T
T
T
T
T
T
T
U
U
U
U
U
U
U
U
U
U
West client-side
East client-side
FIU: fiber interface unit
OA: optical amplifier unit
SC2: bidirectional OSC unit
ITL: interleaver board
OD: optical demultiplexer
OM: optical multiplexer
WSD9: 9-port wavelength selective
WSM9: 9-port wavelength selective
OTU: optical transponder unit
switching demultiplexing board
switching multiplexing board
ODF: optical distribution frame
C-ODD: ODD channels in C band C-EVEN: EVEN channels in C
band
Typical Configuration
The two-dimensional ROADM equipment (80 wavelengths), which can add/drop 30% services
and is formed by the WSD9 and WSM9, is taken for example. Figure 6-14 shows the typical
configuration. Two cabinets and four subracks are required.
203
Figure 6-14 Typical configuration of the ROADM equipment that consists of the WSD9 and
the WSM9 boards (80 wavelengths)
FAN
FAN
A
S
S
A
S
S
EF
U
T
T
EFI2
PIU
PIU
PIU
PIU
STI
ATE
EF
U
T
T
X
G
G
EFI2
PIU
PIU
PIU
PIU
STI
ATE
I1
I1
X
G
G
N
N
N
N
N
N
N
N
S
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
S
N
N
N
N
N
N
N
N
Q
Q
Q
Q
Q
Q
Q
Q
C
Q
Q
Q
Q
Q
Q
Q
Q
Q
Q
Q
Q
Q
Q
Q
Q
C
Q
Q
Q
Q
Q
Q
Q
Q
2
2
2
2
2
2
2
2
C
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
C
2
2
2
2
2
2
2
2
X
X
X
X
C
C
C
C
H
H
H
H
/
/
/
/
X
X
X
X
C
C
C
C
M
M
M
M
T
T
T
T
T
T
T
T
S
T
T
T
T
T
T
T
T
S
Q
Q
Q
Q
O
O
O
O
C
Q
Q
Q
Q
O
O
O
O
C
X
X
X
X
M
M
M
M
C
X
X
X
X
M
M
M
M
C
FAN
FAN
FAN
FAN
A
S
S
A
S
S
EF
U
T
T
EFI2
PIU
PIU
PIU
PIU
STI
ATE
EF
U
T
T
X
G
G
EFI2
PIU
PIU
PIU
PIU
STI
ATE
I1
I1
X
G
G
I
S
S
I
I
S
I
M40
D40
T
C
C
T
D40
M40
M40
D40
T
C
T
D40
M40
L
C
2
L
L
C
L
O
O
O
W
W
W
W
O
F
B
S
B
F
A
S
S
S
S
A
S
I
U
C
U
I
U
M
D
D
M
U
C
U
C
U
1
9
9
9
9
1
C
1
1
FAN
FAN
6.4.3 ROADM Node with ROAM Boards
Functions
An ROADM node formed by ROAM boards can add or drop any of less than 40 wavelengths
at a specified optical port. ROAM boards realize functions such as dynamic adding/dropping,
passing through, blocking, signal path optical power equalization, and optical power detection
for dynamic grooming of service wavelengths in the ring network.
The ROADM formed by the ROAM boards can be adopted in center sites or edge sites. It has
the following advantages:
l Flexible expansion without service interruption
204
l Low operation cost
l Adjustment of wavelength adding/dropping and passing through status by NM software to
realize remote dynamic adjustment of wavelength status
Functional Units
An ROADM system, which consists of ROAM boards, has the following units:
l Optical transponder unit (OTU)
l Optical amplifier unit (OA)
l Bidirectional optical supervisory channel unit (SC2)
l Fiber interface unit (FIU)
l Optical add/drop multiplexer or optical demultiplexer (OADM/OD)
l Reconfigurable optical add module board (ROAM)
l System control and communication unit (SCC)
For the boards used in each unit, see 4.2 Hardware Architecture.
Signal Flow
ROADMs process optical signals in two transmission directions.
It separates optical supervisory signals and the main path signals from the received line signals.
The optical supervisory signals are sent to the optical supervisory units for processing.
The main path signals are amplified and sent to the ROAM board. The signals that need to be
output are demultiplexed by the demultiplexer or OADM unit before entering the OTU and the
local client equipment. The other wavelengths are not added/dropped locally. They pass through
and are multiplexed with the wavelength added locally before optical amplification. Then, they
are multiplexed with the processed optical supervisory signals for line transmission.
Figure 6-15 shows the functional modules of this type of ROADM.
Figure 6-15 Schematic diagram of ROADM node with the ROAM boards
SC2
FIU
FIU
West
OA
OA
East
line-side
ROAM
ROAM
line-side
ODF
OA
OA
ODF
OD
OD
O
O
O
O
O
O
O
O
T
T
T
T
T
T
T
T
U
U
U
U
U
U
U
U
West client-side
East client-side
FIU: fiber interface unit
OA: optical amplifier unit
SC2: bidirectional OSC unit
OD: optical demultiplexer
OTU: optical transponder unit ODF: Optical distribution frame
ROAM: reconfigurable optical add module
board
205
Typical Configuration
The OptiX OSN 8800 is available in two types of subracks, that is, the OptiX OSN 8800 T32
subrack and the OptiX OSN 8800 T64 subrack. The OptiX OSN 8800 T32 subrack is considered
as an example to describe the typical configuration. For the differences between the OptiX OSN
8800 T32 subrack and the OptiX OSN 8800 T64 subrack, see the Hardware Description.
The two-dimensional ROADM equipment (40 wavelengths at the optical layer and 32
wavelengths at the electrical layer), which can add/drop 30% services and is formed by the
ROAM, is taken as an example. Figure 6-16 shows the typical configuration. One cabinet and
two subracks are used.
206
Figure 6-16 Typical configuration of the ROADM equipment that consists of the ROAM boards
FAN
A
S
S
EF
U
T
T
EFI2
PIU
PIU
PIU
PIU
STI
ATE
I1
X
G
G
N
N
N
N
N
N
N
N
S
N
N
N
N
N
N
N
N
Q
Q
Q
Q
Q
Q
Q
Q
C
Q
Q
Q
Q
Q
Q
Q
Q
2
2
2
2
2
2
2
2
C
2
2
2
2
2
2
2
2
X
X
C
C
H
H
/
/
X
X
C
C
M
M
T
T
T
T
T
S
Q
Q
Q
Q
Q
C
X
X
X
X
X
C
FAN
FAN
A
S
S
EF
U
T
T
EFI2
PIU
PIU
PIU
PIU
STI
ATE
I1
X
G
G
S
S
C
D40
C
D40
2
C
O
O
F
O
O
B
S
B
F
I
A
A
U
ROAM
C
ROAM
U
I
U
U
U
C
U
1
1
1
1
FAN
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6.4.4 ROADM Node with WSD9 Board and RMU9 Board (40-
Wavelength)
Functions
The reconfigurable optical add or drop multiplexer (ROADM) with WSD9 board and RMU9
board can add and drop channels dynamically within a ring network. It supports up to eight-
dimensional grooming and extensions between ring networks.
The WSD9 realizes dynamic and configurable demultiplexing of any wavelength to any port.
The board can output any one of the wavelength groups at any node in ring networks and chain
networks. After that, it can distribute any output wavelength to any port to achieve genuine
dynamic wavelength distribution.
The RMU9 adds wavelengths. Its adding port can cooperate with the wavelength-tunable OTU
to achieve all dynamic input of eight wavelengths. Each adding port of the RMU9 can be
connected to the multiplexer. Client-side signals are multiplexed by the multiplexer and input
through the adding port of the RMU9.
The ROADM formed by the WSD9 and the RMU9 board can be adopted in center sites or edge
sites. It has the following advantages:
l Flexible expansion without service interruption
l Low operation cost
l Adjustment of wavelength adding/dropping and passing through status by NM software to
realize remote dynamic adjustment of wavelength status
Functional Units
An ROADM system, which consists of WSD9 and RMU9 boards, has the following units:
l Optical transponder unit (OTU)
l Optical amplifier unit (OA)
l Bidirectional optical supervisory channel unit (SC2)
l Fiber interface unit (FIU)
l Optical add/drop multiplexer or optical multiplexer and demultiplexer (OADM/OM/OD)
l
9-port wavelength selective switching demultiplexing board (WSD9)
l
9-port ROADM multiplexing board (RMU9)
l System control and communication unit (SCC)
For the boards used in each unit, see 4.2 Hardware Architecture.
Signal Flow
ROADMs process optical signals in two transmission directions.
It separates optical supervisory signals and the main path signals from the received line signals.
The optical supervisory signals are sent to the optical supervisory units for processing. The main
path signals are amplified and sent to the WSD9.
208
The wavelengths that need to be dropped locally are output from the specified ports according
to the configuration. The multiplexed signals output from the WSD9 board are demultiplexed
to single wavelengths by the demultiplexer or OADM unit before entering the OTU and the local
client equipment. The single wavelengths output from the WSD9 board are sent to the client
equipment directly through the OTU board.
The wavelengths that are not added/dropped locally pass through to the RMU9 board.
The OM board multiplexes the locally added signals into one channel of signals, and the
multiplexed signals are sent to the RMU9 board. The locally added signals can also be input to
the RMU9 through the OTU board.
The wavelengths coming from the RMU9 are multiplexed with the pass-through wavelength
before optical amplification. Then they are multiplexed with the processed optical supervisory
signals for line transmission.
NOTE
The optical signals output through the TOA optical interface of the RMU9 can be cascaded with an optical
amplifier board. If no cascading is required, connect the TOA optical interface and the ROA optical
interface of the RMU9 directly.
Figure 6-17 shows the functional modules of this type of ROADM.
Figure 6-17 Schematic diagram of ROADM node with WSD9 board and RMU9 board
West client-side
East client-side
O
O
O
O
O
O
O
O
T
T
T
T
T
T
T
T
U
U
U
U
U
U
U
U
OD
OM
OA
WSD9
RMU9
OA
West
East
line-side
line-side
FIU
FIU
ODF
SC2
ODF
OA
RMU9
WSD9
OA
OM
OD
O
O
O
O
O
O
O
O
T
T
T
T
T
T
T
T
U
U
U
U
U
U
U
U
West client-side
East client-side
FIU: fiber interface unit
OA: optical amplifier unit
SC2: bidirectional OSC unit
OD: optical demultiplexer
OM: optical multiplexer
OTU: optical transponder unit
WSD9: 9-port wavelength selective
RMU9: 9-port ROADM
ODF: optical distribution frame
switching demultiplexing board
multiplexing board
Typical Configuration
The OptiX OSN 8800 is available in two types of subracks, that is, the OptiX OSN 8800 T32
subrack and the OptiX OSN 8800 T64 subrack. The OptiX OSN 8800 T32 subrack is considered
209
as an example to describe the typical configuration. For the differences between the OptiX OSN
8800 T32 subrack and the OptiX OSN 8800 T64 subrack, see the Hardware Description.
The two-dimensional ROADM equipment (40 wavelengths), which can add/drop 30% services
and is formed by the WSD9 and RMU9, is taken for example. Figure 6-18 shows the typical
configuration. One cabinet and two subracks are required.
210
Figure 6-18 Typical configuration of the ROADM equipment that consists of the WSD9 and
RMU9 boards (40 wavelengths)
FAN
A
S
S
EF
U
T
T
EFI2
PIU
PIU
PIU
PIU
STI
ATE
I1
X
G
G
N
N
N
N
N
N
N
N
S
N
N
N
N
N
N
N
N
Q
Q
Q
Q
Q
Q
Q
Q
C
Q
Q
Q
Q
Q
Q
Q
Q
2
2
2
2
2
2
2
2
C
2
2
2
2
2
2
2
2
X
X
C
C
H
H
/
/
X
X
C
C
M
M
T
T
T
T
T
T
T
T
S
Q
Q
Q
Q
O
O
O
O
C
X
X
X
X
M
M
M
M
C
FAN
FAN
A
S
S
EF
U
T
T
EFI2
PIU
PIU
PIU
PIU
STI
ATE
I1
X
G
G
S
S
M40
D40
C
C
D40
M40
C
2
O
R
O
O
W
R
W
O
F
B
S
M
B
F
A
S
M
S
A
I
U
C
U
U
I
U
D
U
D
U
U
C
U
1
9
9
9
1
1
9
1
FAN
211
6.4.5 ROADM Node with WSD9 Board and RMU9 Board (80-
Wavelength)
Functions
The reconfigurable optical add or drop multiplexer (ROADM) with WSD9 board and RMU9
board can add and drop channels dynamically within a ring network. It supports up to eight-
dimensional grooming and extensions between ring networks.
The WSD9 achieves dynamic and configurable demultiplexing of any wavelength to any port.
The board can output any one of the wavelength groups at any node in ring networks and chain
networks. After that, it can distribute any output wavelength to any port to achieve genuine
dynamic wavelength distribution.
The RMU9 adds wavelengths. Its adding port can cooperate with the wavelength-tunable OTU
to achieve all dynamic input of eight wavelengths. Each adding port of the RMU9 can be
connected to the multiplexer. Client-side signals are multiplexed by the multiplexer and input
through the adding port of the RMU9.
The ROADM formed by the WSD9 and the RMU9 board can be used in center sites or edge
sites. It has the following advantages:
l Flexible expansion without service interruption
l Low operation cost
l Adjustment of wavelength adding/dropping and passing through status by NM software to
realize remote dynamic adjustment of wavelength status
Functional Units
An ROADM system, which consists of WSD9 and RMU9 boards, has the following units:
l Optical transponder unit (OTU)
l Optical amplifier unit (OA)
l Bidirectional optical supervisory channel unit (SC2)
l Fiber interface unit (FIU)
l Interleaver unit (ITL)
l OADM or optical multiplexer and demultiplexer (OADM/OM/OD)
l
9-port wavelength selective switching demultiplexing board (TN13WSD9)
l
9-port ROADM multiplexing board (RMU9)
l System control and communication unit (SCC)
For the boards used in each unit, see 4.2 Hardware Architecture.
Signal Flow
ROADMs process optical signals in two transmission directions.
212