HUAWEI OptiX OSN 8800 T64/T32 Intelligent Optical Transport Platform. Product Description - part 21
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 TN13WSD9.
In Figure 6-19, the ITL board shown in 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 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 client equipment through the OTU board. The single wavelengths output from the
TN13WSD9 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.
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 RMU9 board through two ports respectively, or are sent to the RMU9 board after being
further multiplexed into one channel of signals by the ITL board. The locally added signals can
also be input to the RMU9 through the OTU board.
The wavelength input by the RMU9 is 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 6-19 shows the functional modules of this type of ROADM.
213
Figure 6-19 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
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
RMU9
OA
West
East
line-side
FIU
FIU
line-side
ODF
SC2
ODF
OA
RMU9
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
RMU9: 9-port ROADM
OTU: optical transponder unit
switching demultiplexing board
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 RMU9, is taken for example. Figure 6-20 shows the typical
configuration. Two cabinets and four subracks are required.
214
Figure 6-20 Typical configuration of the ROADM equipment that consists of the ROAM 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
I1
X
G
G
EFI2
PIU
PIU
PIU
PIU
STI
ATE
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
R
W
W
R
O
F
B
S
B
F
A
M
S
S
M
A
S
I
U
C
U
I
U
U
D
D
U
U
C
U
C
U
1
9
9
9
9
1
C
1
1
FAN
FAN
6.4.6 ROADM Node with RDU9 Board and WSM9 Board (40-
Wavelength)
Functions
The reconfigurable optical add or drop multiplexer (ROADM) with RDU9 board and WSM9
board can add and drop channels dynamically within a ring network. It supports up to eight-
dimensional grooming and extension between ring networks.
The RDU9 drops wavelengths. Each dropping port of the RDU9 can be connected to the
demultiplexer. The broadcasting signals are demultiplexed by the demultiplexer and output to
the OTU board.
215
The WSM9 realizes dynamic and configurable multiplexing of any wavelength to any port. The
board can input any one of the wavelength groups at any node in ring networks and chain
networks. Any wavelength can be input through any port of the WSM9. It can achieve genuine
dynamic wavelength distribution.
The ROADM formed by the RDU9 and the WSM9 boards 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 RDU9 and WSM9 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 OADM or optical multiplexer and demultiplexer (OADM/OM/OD)
l
9-port ROADM demultiplexing board (RDU9)
l
9-port wavelength selective switching multiplexing board (WSM9)
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.
The FIU 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 RDU9.
The signals are broadcasting to the dropping ports of the RDU9. The wavelengths that need to
be dropped locally are demultiplexed to single wavelengths by the demultiplexer or OADM unit.
Then the single wavelengths are sent to the client equipment through the OTU board.
The wavelengths that are not added/dropped locally pass through to the WSM9 board.
The OM board multiplexes the locally added signals into one channel of signals, and the
multiplexed signals are sent to the WSM9 board. The locally added signals can also be input to
the WSM9 through the OTU board.
The wavelengths coming from the WSM9 are multiplexed with the pass-through wavelength
before optical amplification. Then, they are multiplexed with the processed optical supervisory
signals for line transmission.
Figure 6-21 shows the functional modules of this type of ROADM.
216
Figure 6-21 Schematic diagram of ROADM node with RDU9 board and WSM9 board
West client-side
East client-side
O
O
O
O
O
O
O
T
T
T
T
T
T
T
U
U
U
U
U
U
U
OD
OD
OM
OA
RDU9
WSM9
OA
East
West
line-side
FIU
FIU
line-side
SC2
ODF
ODF
OA
WSM9
RDU9
OA
OM
OD
OD
O
O
O
O
O
O
O
T
T
T
T
T
T
T
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
WSM9: 9-port wavelength selective
RDU9: 9-port ROADM
ODF: Optical distribution frame
switching multiplexing board
demultiplexing board
Typical Configuration
The two-dimensional ROADM equipment (40 wavelengths), which can add/drop 30% services
and is formed by the WSM9 and RDU9, is taken for example. Figure 6-22 shows the typical
configuration. One cabinet and two subracks are required.
217
Figure 6-22 Typical configuration of the ROADM equipment that consists of the WSM9 and
RDU9 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
W
O
O
R
W
R
O
F
B
S
S
B
F
A
D
S
D
A
I
U
C
M
U
I
U
U
M
U
U
U
C
U
1
9
9
9
1
1
9
1
FAN
218
6.4.7 ROADM Node with RDU9 Board and WSM9 Board (80-
Wavelength)
Functions
The reconfigurable optical add or drop multiplexer (ROADM) with RDU9 board and WSM9
board can add and drop channels dynamically within a ring network. It supports up to eight-
dimensional grooming and extension between ring networks.
The RDU9 drops wavelengths. Each dropping port of the RDU9 can be connected to the
demultiplexer. The broadcasting signals are demultiplexed by the demultiplexer and output to
the OTU board.
The WSM9 realizes dynamic and configurable multiplexing of any wavelength to any port. The
board can input any one of the wavelength groups at any node in ring networks and chain
networks. Any wavelength can be input through any port of the WSM9. It can achieve genuine
dynamic wavelength distribution.
The ROADM formed by the RDU9 and the WSM9 boards 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 RDU9 and WSM9 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 ROADM demultiplexing board (RDU9)
l
9-port wavelength selective switching multiplexing board (TN13WSM9)
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.
The FIU 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 RDU9.
219
In Figure 6-23, the ITL board shown in 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 RDU9 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 wavelengths that need to be output locally are output
to the OD (C-ODD) and OD (C-EVEN) boards through two interfaces on the RDU9 board.
The OD (C-EVEN) board (or an OADM board) demultiplexes the even-numbered wavelengths
into single even-numbered wavelengths that are sent to the client equipment through the OTU
board. The OD (C-ODD) board demultiplexes the odd-numbered wavelengths into single odd-
numbered wavelengths that are sent to the client equipment through the OTU board.
The wavelengths that are not added/dropped locally pass through to the TN13WSM9.
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 through the OTU board.
The wavelength input by the TN13WSM9 is multiplexed with the pass-through wavelength
before optical amplification. Then, they are multiplexed with the processed optical supervisory
signals for line transmission.
Figure 6-23 shows the functional modules of this type of ROADM.
220
Figure 6-23 Schematic diagram of ROADM node with RDU9 board and WSM9 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
(C-ODD)
(C-EVEN)
(C-ODD)
(C-EVEN)
OD
OD
OM
OM
ITL
ITL
OA
RDU9
WSM9
OA
West
East
line-side
FIU
FIU
line-side
SC2
ODF
ODF
OA
WSM9
RDU9
OA
ITL
ITL
OM
OM
OD
OD
(C-EVEN)
(C-ODD)
(C-EVEN)
(C-ODD)
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
ITL: interleaver board
OD: optical demultiplexer
OM: optical multiplexer
WSM9: 9-port wavelength
RDU9: 9-port ROADM
OTU: optical transponder unit
selective switching multiplexing
demultiplexing board
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 WSM9 and RDU9, is taken for example. Figure 6-24 shows the typical
configuration. Two cabinets and four subracks are required.
221
Figure 6-24 Typical configuration of the ROADM equipment that consists of the WSM9 and
RDU9 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
I1
X
G
G
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
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
I1
X
G
G
EFI2
PIU
PIU
PIU
PIU
STI
ATE
I1
X
G
G
I
S
S
I
I
S
I
M40
D40
T
C
C
T
D40
M40
C
M40
D40
T
T
D40
M40
L
C
2
L
L
C
L
O
O
O
W
R
R
W
O
F
B
S
B
F
A
S
D
D
S
A
S
I
U
C
U
I
U
M
U
U
M
U
C
U
C
U
1
9
9
9
9
1
C
1
1
FAN
FAN
6.4.8 ROADM Node with WSMD2 Boards
Functions
The reconfigurable optical add or drop multiplexer (ROADM) with WSMD2 boards can add
and drop channels dynamically within a ring network. It supports up to two-dimensional
grooming and extension between ring networks.
WSMD2 board achieves the dynamic and configurable multiplexing and demultiplexing of any
wavelengths to any ports. A node on the ring or chain network can receive any wavelengths at
the local station through any ports. It also can transmit any wavelength combination to any ports,
so as to achieve the dynamic allocation of wavelengths. The ROADM node uses two WSMD2s
to add/drop any service in any even-numbered wavelength of the two directions in the C band.
222
The ROADM formed by the WSMD2 boards 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 WSMD2 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 OADM or optical multiplexer and demultiplexer (OADM/OM/OD)
l
2-port wavelength selective switching multiplexing and demultiplexing board (WSMD2)
l System control and communication unit (SCC)
For the boards used in each unit, see 4.2 Hardware Architecture.
Signal Flow
An ROADM node consists of two WSMD2s. The signal grooming from west to east is taken
for example. The signal grooming from east to west is the same as that from west to east.
Initially, the west FIU separates the optical supervisory signals and the main path optical signals
from the line signals received from west. The optical supervisory signals are sent to the optical
supervisory unit for processing, and the main-path optical signals are sent to the west WSMD2
board after being amplified.
The west WSMD2 board splits the main path optical signals into two equal optical signals to
the EXPO and DM optical interfaces. The optical demultiplexing unit demultiplexes the main
path signals into single wavelengths that need be output from the local station.
If the service signals need be output eastward, the signals from west WSMD2 board are input
through the east WSMD2 board. The added wavelengths that need be output eastward are added
through an input port on the east WSMD2 board. The added wavelengths are multiplexed with
the wavelengths groomed from west. The multiplexed wavelengths are amplified and are further
multiplexed with the processed optical supervisory signals for line transmission.
Figure 6-25 shows the functional modules of this type of ROADM.
223