HUAWEI OptiX OSN 8800 T64/T32 Intelligent Optical Transport Platform. Product Description - part 23
Figure 6-33 REG signal flow (line unit as regeneration unit)
λ01
DCM
Line Unit
Line Unit
DCM
λ02
Line Unit
Line Unit
OA
OM
OD
OA
λn
Line Unit
Line Unit
F
F
I
SC2
I
U
U
λ01
Line Unit
Line Unit
MCA
λ02
Line Unit
Line Unit
OA
OD
OM
OA
λn
DCM
Line Unit
Line Unit
DCM
Electrical cross-connection
OM: optical multiplex unit
OD: optical demultiplex unit
SC2: bidirectional OSC unit
FIU: fiber interface unit
OA: optical amplifier unit
ODF: optical distribution frame
MCA: spectrum analyzer unit DCM: dispersion compensation module
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.
Figure 6-34 shows the typical configuration of the DWDM REG equipment, that is, one cabinet,
one OptiX OSN 8800 T32 subrack, one OptiX OSN 6800 subrack, and two DCM frames.
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Figure 6-34 Typical configuration of DWDM REG equipment
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NOTE
In the previous figure, the OTU can be replaced with a line board.
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6.6 OTM in a CWDM System
The OptiX OSN 8800 provides OTM equipment.
Functions
The OTM is adopted in terminal stations, logically divided into transmit direction and receive
direction. In the transmit direction, the OTM converges or converts the client-side signals. Then,
the signals are multiplexed into main path signals by the OADM before line transmission. In the
receive direction, the OTM performs the reverse process.
Functional Units
A CWDM OTM node has the following functional units:
l Optical transponder unit (OTU)
l Optical add/drop multiplexer (OADM)
l System control and communication unit (SCC)
For the boards used in each unit, see 4.2 Hardware Architecture.
Signal Flow
In the transmit direction, the accessed signals are converged/converted by the OTU into signals
with ITU-T G.694.2-compliant CWDM wavelengths. After that, the signals are multiplexed by
the OADM unit into the main path signals for line transmission.
In the receive direction, the line signals are demultiplexed by the OADM unit into signals of
different wavelengths, and then sent to the corresponding client equipment after being converted/
divided by the OTUs.
The schematic diagram of CWDM OTM node is shown in Figure 6-35.
Figure 6-35 Schematic diagram of CWDM OTM node
OTU
OTU
OADM
Unit
OTU
OTU
OADM Unit: OADM unit(s)
OTU: Optical transponder unit
ODF: Optical distribution frame
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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.
An 8-wavelength OTM node in a CWDM system is taken for example. Figure 6-36 shows the
typical configuration. One cabinet and one subrack are required.
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Figure 6-36 Typical Configuration of the OTM equipment in a CWDM system
FAN
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6.7 FOADM in a CWDM System
The OptiX OSN 8800 provides FOADM equipment.
Functions
FOADM adds/drops fixed wavelengths to/from the multiplexed signals.
Functional Units
A CWDM FOADM node has the following functional units:
l Optical transponder unit (OTU)
l Optical add/drop multiplexer (OADM)
l System control and communication unit (SCC)
For the boards used in each unit, see 4.2 Hardware Architecture.
Signal Flow
The CWDM FOADM node is responsible for processing the optical signals in two transmission
directions.
It receives and sends line signals to the OADM unit, where some wavelengths are dropped to
the OTUs and then to the client side equipment.
Other wavelengths just pass through the OADM unit and are multiplexed with the wavelengths
added locally.
Then, the multiplexed wavelengths are sent to the line for transmission.
The schematic diagram of CWDM FOADM node is shown in Figure 6-37.
Figure 6-37 Schematic diagram of CWDM FOADM node
Pass through
East
West
line-side
OADM Unit
OADM Unit
line-side
ODF
ODF
O
O
O
O
T
T
T
T
U
U
U
U
West client-side equipment
East client-side equipment
OADM Unit: OADM unit(s)
OTU: Optical transponder unit
ODF: Optical distribution frame
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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.
An FOADM node that adds/drops and multiplexes eight wavelengths in either of the two transmit
directions in a CWDM system is taken for example. Figure 6-38 shows the typical configuration.
One cabinet and one subrack are required.
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Figure 6-38 Typical Configuration of the FOADM equipment in a CWDM system
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6.8 TM in an SDH System
The TM multiplexes low-rate signals into high-rate synchronous digital hierarchy (SDH) optical
signals and cross-connects the line signals with the low-rate SDH signals (tributary signals). The
TM performs the reverse process.
NE Architecture
Figure 6-39 shows the architecture of the TM.
Figure 6-39 Functional block diagram of the TM when the OptiX OSN 8800 functions as a TM
STM-16/64
low-rate SDH
signals
The TM is used at the two ends of a chain network. It is also used at a terminal station in the
ring-with-chain network topology.
Typical Configuration of the STM-64 TM
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.
Figure 6-40 shows the typical configuration when the OptiX OSN 8800 T32 functions as an
STM-64 TM.
l Configure one SLQ64 board to transmit and receive the STM-64 signals.
l Insert other boards into other slots on the equipment according to the service requirements.
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Figure 6-40 Typical configuration when the OptiX OSN 8800 T32 functions as an STM-64 TM
FAN
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6.9 ADM in an SDH System
The ADM is most widely used on the SDH network. The ADM integrates the functions of
synchronous multiplexing and digital cross-connection. Thus, the ADM is capable of adding or
dropping low-rate SDH signals according to the requirements.
In addition to the signal multiplexing and demultiplexing functions of the TM, the ADM can
complete the cross-connection between line signals and the cross-connection between line
signals and low-rate SDH signals. For example, the accessed STM-1 low-rate SDH signals can
be multiplexed and cross-connected to the line signals in two directions. The line signals can
also be interconnected in two directions.
NE Architecture
The architecture of the ADM is similar to the combination of two back-to-back TMs, as shown
in Figure 6-41.
Figure 6-41 Functional block diagram of the ADM used in the OptiX OSN 8800
STM-16/64
STM-16/64
low-rate SDH
signals
The ADM is widely used in the topology based on the chain network, ring network, and hub
network.
Typical Configuration of the STM-16 ADM
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.
Figure 6-42 shows the typical configuration when the OptiX OSN 8800 T32 functions as an
STM-16 ADM.
l Configure two SLO16 boards to transmit and receive the STM-16 signals in a bidirectional
manner.
l Insert other boards into other slots on the equipment according to the service requirements.
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