Huawei OptiX BWS 1600G. Technical Description - part 4
2 Product Description
Table 2-6 Application and description of wavelength conversion units (2.5 Gbit/s or lower)
Board name
Application
Functions
Regeneratin
g board
LWC1
Channel spacing: 100 GHz
Accesses STM-16 optical signal compliant
TRC1
with ITU-T G.957 on the client side.
Line code: NRZ
Converts the signal into OTU1 optical
Applied to type II, III, V,
signal and outputs DWDM standard
VI systems
wavelength compliant with ITU-T
FEC mode: FEC
G.694.1.
The reverse process is similar.
The signal encoding and decoding is
compliant with ITU-T G.975, supporting
G.709-compliant overhead processing.
Supports wavelength adjustment for the
transmitted optical signal on the DWDM
side.
It does not support SuperWDM
technology.
TRC1
Channel spacing: 100 GHz
Used in an REG station to regenerate
TRC1
corresponding optical signals.
Line code: NRZ
The signal encoding and decoding is
Applied to type II, III, V,
compliant with ITU-T G.975, supporting
VI systems
G.709-compliant overhead processing.
FEC mode: FEC
Supports wavelength adjustment for the
transmitted optical signal on the DWDM
side.
It does not support SuperWDM
technology.
LWM
Channel spacing: 100 GHz
Converts the signal with the rate of
LWMR
STM-1/OC-3, STM-4/OC-12 or
Line code: NRZ
STM-16/OC-48 into the optical one with
Applied to type II, III, V,
the G.694.1-comliant DWDM standard
VI systems
wavelength.
FEC mode: does not
Supports service conversion in
support
SDH/SONET and all kinds of cascading
formats.
Supports wavelength adjustment for the
transmitted optical signal on the DWDM
side.
It does not support SuperWDM
technology.
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2 Product Description
Board name
Application
Functions
Regeneratin
g board
LWX
Channel spacing: 100 GHz
Converts the optical signal with the
LWXR
arbitrary rate (34 Mbit/s-2.7 Gbit/s) within
Line code: NRZ
the 1280 nm-1565 nm wavelength range
Applied to type II, III, V,
into the optical one with the
VI systems
G.694.1-compliant standard wavelength.
FEC mode: does not
Is able to access the PDH (34 Mbit/s, 45
support
Mbit/s or 140 Mbit/s), ESCON (200
Mbit/s) and FC (1.06 Gbit/s) services.
Supports wavelength adjustment for the
transmitted optical signal on the DWDM
side.
It does not support SuperWDM
technology.
Table 2-7 Application and description of convergent optical wavelength conversion units
Board name
Application
Functions
Regenerati
ng board
TMX
Channel spacing: 50 GHz or 100
In the transmit direction, the TMX
TMR
GHz
board multiplexes four STM-16 signals
from different sources into
Line code: NRZ
G.709-compliant OTU2 signal. Then,
Applied to type I, II, III, IV, VI
this signal is converted into the optical
systems
signal with ITU-T G.694.1-compliant
FEC mode: AFEC
standard wavelength. In the receive
direction, it performs the reverse.
The signal encoding and decoding is
compliant with ITU-T G.975.1,
supporting G.709-compliant overhead
processing.
Supports wavelength adjustment for the
transmitted optical signal on the
DWDM side.
It does not support SuperWDM
technology.
TMXS
Channel spacing: 50 GHz or 100
The function, encoding/decoding and
TMRS
GHz
overhead processing are the same as
that of the TMX.
Line code: CRZ
It does not support wavelength
Applied to type II, III, VI
adjustment for the transmitted optical
systems
signal on the DWDM side.
FEC mode: AFEC
Supports SuperWDM technology.
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2 Product Description
Board name
Application
Functions
Regenerati
ng board
LOG
Channel spacing: 50 GHz or 100
Converges four channels of FC200
TMR
GHz
services, eight channels of GE services
or eight channels of FC100 services
Line code: NRZ
into the STM-64/OC-192 optical signal,
Applied to type I, II, III, IV, VI
and then converts it into the ITU-T
systems
G.694.1-compliant standard
FEC mode: AFEC
wavelength. In the receive direction, the
board achieves the reverse.
The signal encoding and decoding is
compliant with ITU-T G.975.1,
supporting G.709-compliant overhead
processing.
Supports wavelength adjustment for the
transmitted optical signal on the
DWDM side.
It does not support SuperWDM
technology.
LOGS
Channel spacing: 50 GHz or 100
The function, encoding/decoding and
TMRS
GHz
overhead processing are the same as
that of the LOG.
Line code: CRZ
It does not support wavelength
Applied to type II, III, VI
adjustment for the transmitted optical
systems
signal on the DWDM side.
FEC mode: AFEC
Supports SuperWDM technology.
LDG
Channel spacing: 100 GHz
Multiplexes two GE signals into an
LWMR
STM-16 signal.
Line code: NRZ
In the transmit direction, the board
Applied to type II, III, V, VI
converts two IEEE 802.3z-compliant
systems
GE signals into the optical signal with
FEC mode: does not support
the G.694.1-compliant DWDM
standard wavelength through
conversion, decapsulation and
multiplexing. In the receive direction, it
restores two IEEE 802.3z-compliant
GE signals and sends them to the
Gigabit router or other GE devices in
the reverse process.
Supports wavelength adjustment for the
transmitted optical signal on the
DWDM side.
It does not support SuperWDM
technology.
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2 Product Description
Board name
Application
Functions
Regenerati
ng board
FDG
Channel spacing: 100 GHz
Multiplexes two GE signals into an
TRC1
OTU1 signal with FEC.
Line code: NRZ
In the transmit direction, the board
Applied to type II, III, V, VI
converts two IEEE 802.3z-compliant
systems
GE signals into the optical signal with
FEC mode: FEC
the G.694.1-compliant DWDM
standard wavelength through
conversion, decapsulation and
multiplexing. In the receive direction, it
restores two IEEE 802.3z-compliant
GE signals and sends them to the
gigabit router or other GE devices in
the reverse process.
The signal encoding and decoding is
compliant with ITU-T G.975,
supporting G.709-compliant overhead
processing.
Supports wavelength adjustment for the
transmitted optical signal on the
DWDM side.
It does not support SuperWDM
technology.
2.3.2 Optical Multiplexer/Demultiplexer and Add/Drop
Multiplexer
The optical multiplexing/demultiplexing related boards of the OptiX BWS 1600G
system include:
Table 2-8 Board name and category of the Optical Multiplexer/Demultiplexer and Add/Drop
Multiplexer unit
Service type
Board
Board description
Optical
M40
40-channel optical multiplexer
multiplexer/d
D40
40-channel optical demultiplexer
emultiplexer
and add/drop
V40
40-channel optical multiplexer with VOA
multiplexer
unit
FIU
Fiber interface unit
ITL
Interleaver unit
MR2
2-channel optical add/drop unit
DWC
Dynamic wavelength add/drop control unit
2-16
2 Product Description
Table 2-9 briefs the application and functions of the above boards. For more details,
see Chapter 7 "Optical Multiplexer, Demultiplexer, Add and Drop Unit" in OptiX
BWS 1600G Backbone DWDM Optical Transmission System Hardware
Description.
Table 2-9 Application and description of the optical multiplexer/demultiplexer/add/drop
multiplexer
Board name
Application
Functions
M40
There are four types of boards
At the transmit end, the M40 multiplexes 40 optical
corresponding to four wavebands:
signals from OTUs into a single fibre for
transmission. That is, it has the function of
M40 (C-EVEN), M40 (C-ODD),
multiplexing 40 channels.
M40 (L-EVEN) and M40 (L-ODD)
Provides the online monitoring of optical interfaces
Applied to all types of systems.
to monitor the spectrum of the main optical path
without interrupting the traffic.
D40
There are four types of boards
At the receive end, the D40 demultiplexes the main
corresponding to four wavebands:
path optical signal transmitted over a single fibre
into 40 optical signals of different wavelengths and
D40 (C-EVEN), D40 (C-ODD),
sends them to the corresponding OTUs.
D40 (L-EVEN) and D40 (L-ODD)
Provides the online monitoring of optical interfaces
Applied to all types of systems.
to monitor the spectrum of the main optical path
without interrupting the traffic.
V40
There are two types of boards
At the transmit end, the V40 adjusts the optical input
corresponding to two wavebands:
power of the 40 channels and multiplexes these
channels into a single fibre for transmission.
V40 (C-EVEN), V40 (C-ODD)
Provides the online monitoring of optical interfaces
Applied to type I, II, III, V and VI
to monitor the spectrum of the main optical path
systems.
without interrupting the traffic.
2-17
2 Product Description
Board name
Application
Functions
FIU
There are four types of boards
The FIU multiplexes or demultiplexes the signals
corresponding to different systems:
over the main channel and the optical supervisory
channel. In the transmit direction, the FIU accesses
FIU-01: Supports the C-band,
the optical supervisory signal. In the receive
L-band, supervisory channel
direction, it extracts the optical supervisory signals.
multiplexer and demultiplexer;
applied to type I and II systems.
Provides the online monitoring of optical interfaces
FIU-02: Supports the C-band,
to monitor the spectrum of the main optical path
L-band, supervisory channel
without interrupting the traffic.
multiplexer and demultiplexer, and
clock protection; applied to type I
and II systems.
FIU-03: Supports the C-band,
supervisory channel multiplexer
and demultiplexer; applied to type
III and V systems.
FIU-04: Supports the L-band,
supervisory channel multiplexer
and demultiplexer; applied to type
IV system.
FIU-06: Supports the C-band,
supervisory channel multiplexer
and demultiplexer; applied to high
power situation such as type VI
system.
ITL
There are two types of boards
The ITL board achieves the mutual conversion
corresponding to different
between the DWDM system with the 100 GHz
wavebands:
channel spacing and that with the 50 GHz channel
spacing.
ITL-C and ITL-L. Applied to type I
system.
MR2
Applied to all types of systems
The MR2 board adds/drops two channels of services
except type IV and type VI.
with the fixed wavelength in the OADM.
DWC
Applied to all types of systems
The DWC board adds/drops any channel of services
except type IV and type VI.
in the OADM.
2.3.3 Optical Amplifier
The EDFA is an essential component of the system. It is used to compensate for
signal attenuation caused by optical components and optical fibres so as to extend
the signal transmission distance.
The OptiX BWS 1600G system also adopts the Raman amplification technology.
The combination of EDFA and Raman amplifier can reduce the system noise and
effectively suppress the deterioration of OSNR, thereby optimising the system
performance.
2-18
2 Product Description
The optical amplifier boards include the following:
Table 2-10 Board name and category of the Optical amplifier unit
Service type
Board
Board description
Optical
OAU
Optical amplifier unit
amplifier unit
OBU
Optical booster unit
OPU
Optical preamplifier unit
HBA
High-power optical booster amplifier unit
RPC
Raman pump amplifier unit for C-band
RPA
Raman pump amplifier unit for C-band and L-band
Table 2-11 and Table 2-12 brief the application and functions of the EDFA unit and
the Raman amplifier unit. For more details, see Chapter 8 "Optical Amplifier Unit"
in OptiX BWS 1600G Backbone DWDM Optical Transmission System Hardware
Description.
Table 2-11 Application and description of the EDFA units
Board name
Application
Functions
OAU
The E2 version provides one type of OAU
The OAU board can amplify the input
board: OAU-LG (See Note 1)
optical signal, compensate for the fibre
loss, and increase the receive-end
OAU-LG is used for amplifying L-band
sensitivity budget.
optical signals.
The OAU board uses the automatic gain
The E3 version provides three types of OAUs:
control technique to realise the gain
OAUC01, OAUC03, and OAUC05 to
locking function.
amplify signals in C-band
Applied to all types of systems.
OBU
The OBU has also two hardware versions:
The OBU board can amplify the optical
E2OBU and E3OBU.
signal power.
One type of the E2OBU is available: OBU-L.
The OBU board uses the automatic gain
control technique to realise the gain
OBU-L is used for amplifying L-band optical
locking function.
signals.
The E3OBU is of two specifications, mainly
applying to C-band system: OBUC03 and
OBUC05.
Applied to all types of systems.
OPU
Used alone or together with the OBU.
Features small noise figure, used to
improve the receiver sensitivity budget.
Applied to the C-band
Uses the automatic gain control technique
Applied to type III, V and VI systems.
for gain locking.
2-19
2 Product Description
Board name
Application
Functions
HBA
Applied to the transmitter of the OTM station in
Amplifies the optical signal to
long hop (LHP) application. Applied to the
high-power in the transmit direction to
C-band.
meet the requirements for LHP
application.
Applied to type VI system.
Table 2-12 Application and description of the Raman amplifier units
Board name
Application
Functions
RPC
RPC is the Raman pump amplifier unit
Used at the receive end of the DWDM system,
for C-band.
it amplifies signals during transmission by
sending high-power pump light to the
Always used together with the EDFA.
transmission fibre.
Applied to type I, II, III and VI systems.
Raman pump amplifier units realise long-haul,
RPA
RPA is the Raman pump amplifier unit
broad bandwidth, low noise, and distributed
for C-band and L-band.
online optical signal amplification.
Always used together with the EDFA.
These units can automatically lock the pump
power, receive the SCC command to switch
Applied to type I, II and IV systems.
on/off the pump source, separate the signal
light, report performances and alarms, and
protect the pump laser.
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2 Product Description
2.3.4 Optical Supervisory Channel and Timing Transporting Unit
The optical supervisory unit implements overhead processing and transport. The
optical supervisory and timing transporting unit implements overhead processing
and timing transport.
Table 2-13 Board name and category of the optical supervisory channel unit
Service type
Board
Board description
optical
SC1
Unidirectional optical supervisory channel
supervisory
SC2
Bidirectional optical supervisory channel
channel unit
TC1
Unidirectional optical supervisory and timing transporting unit
TC2
Bidirectional optical supervisory and timing transporting unit
Table 2-14 briefs the application and functions of the above boards. For more
details, see Chapter 12 "Optical Supervisory Units and System Control and
Communication Unit" in OptiX BWS 1600G Backbone DWDM Optical
Transmission System Hardware Description.
Table 2-14 Application and description of optical supervisory channel/timing transporting
units
Board name
Application
Functions
SC1
The SC1 is used in OTM.
Processes one channel of optical supervisory signal,
receives and sends optical supervisory signal in OTM.
Applied to all types of
systems.
The carrier wavelength of the optical supervisory
channel is 1510 nm or 1625 nm.
SC2
The SC2 is used in OLA,
Receives and sends bi-directional optical supervisory
OADM, REG, and OEQ.
channel signals.
Applied to all types of
The carrier wavelength of the optical supervisory
systems.
channel is 1510 nm or 1625 nm.
TC1
The TC1 is used in OTM.
Receives and sends one optical supervisory channel
signal and three channels of 2 Mbit/s clock signals.
Applied to all types of
systems.
The carrier wavelength of the optical supervisory
channel is 1510 nm or 1625 nm.
TC2
The TC2 is used in OLA,
Receives and sends bi-directional optical supervisory
OADM, REG and OEQ.
channel signals and three channels of 2 Mbit/s clock
signals.
Applied to all types of
systems.
The carrier wavelength of the optical supervisory
channel is 1510 nm/1625 nm.
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2 Product Description
2.3.5 Performance Monitoring and Adjustment Unit
The performance monitoring and adjustment unit is used to monitor the optical
spectrum characteristics and optical power, and to adjust the optical power and
dispersion. It includes:
Table 2-15 Board name and category of the performance monitoring and adjustment unit
Service type
Board
Board name
performance
MCA
Multi-channel spectrum analyzer unit
monitoring and
VOA
Variable optical attenuator unit
adjustment unit
VA4
4-channel variable optical attenuator unit
DGE
Dynamic gain equalizer unit
DSE
Dispersion slop equilibrium unit
GFU
Gain flatness unit
Table 2-16 briefs the application and functions of the above boards. For more
details, see Chapter 9 "Performance Detection and Adjustment Units" in OptiX
BWS 1600G Backbone DWDM Optical Transmission System Hardware
Description.
Table 2-16 Application and description of performance monitoring & adjustment units
Board and
Application
Functions
module name
MCA
There are two types of MCA
Provides the built-in on-line monitoring and
available:
spectrum analysis function to online monitor
such parameters as the central wavelength,
MCA-8: on-line monitoring of eight
optical power, and OSNR of the optical signals
optical channels.
at 8/4 different points of the system.
MCA-4: on-line monitoring of four
optical channels.
Applied to all types of systems.
VOA
Adjusts the optical power of the line
Adjusts the optical power of one optical
signal.
channel according to the command from the
SCC.
Applied to all types of systems.
VA4
Used in the OADM system to adjust
Adjusts the optical power of four optical
the power of the add/drop channel
channels according to the command from the
optical signal, ensuring power
SCC.
equalization for the main path signal.
Applied to all types of systems.
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2 Product Description
Board and
Application
Functions
module name
DGE
Applied to the optical equilibrium
Equalises the optical power of all channels by
(OEQ) station.
adjusting its own insertion loss spectrum.
Applied to type II, III system.
DSE
There are two types of DSE boards:
Provides the dispersion slope compensation
DSE-I and
optical interface, used together with the
dispersion compensation module (combination
DSE-II.
of DCMs), for dispersion equalization and
Applied to type II, III system.
compensation.
GFU
Used together with the optical
Uses the gain flattening filter (GFF) for static
amplifier unit (E2OAU), raman
compensation on uneven gains caused by
amplifier or ROP amplifier.
optical amplifier and amplifier concatenation.
Applied to type II and III systems.
2.3.6 Optical Fibre Automatic Monitoring Unit
The optical fibre automatic monitoring unit monitors a fibre (cable) automatically.
It provides features such as fibre aging pre-warning, fibre link alarming and initial
fibre fault locating. It includes:
Table 2-17 Board name and category of the optical fibre automatic monitoring unit
Service type
Board
Board description
optical fibre
FMU
Fiber monitoring unit
automatic
MWA
Monitoring wavelength access unit
monitoring
unit
MWF
Monitoring wavelength filtering unit
The embedded OAMS is an optional function. You can order it as required in
practice. The structure of an embedded OAMS system is shown in Figure 2-3.
DWDM node
DWDM node
DWDM node
MWF
MWA
MWF
FMU
Figure 2-3 Structure of the embedded OAMS application (online monitoring)
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