About This Chapter
2 Board List and Classification
2.3 Board Classification
This topic describes the board categories that the OptiX 155/622H supports according to the functions of the boards.
2.3.1 SDH Boards
The OptiX 155/622H supports STM-1/STM-4/STM-16 line boards.
2.3.2 PDH Boards
The OptiX 155/622H supports the PDH boards that operate at different rates and have different impedances.
2.3.3 Data Boards
The OptiX 155/622H supports the data boards that provide the transmission function and switching function.
2.3.4 Packet Boards
The OptiX 155/622H supports the packet boards that operate at different rates.
2.3.5 Cross-Connect and System Control Board
The system control and communication unit (SCC), cross-connect unit (XC), synchronous timing generator (STG), engineering orderwire unit (EOW), STM-1/STM-4/STM-16 line unit (OI2D/OI4D/OI16D), and E1 tributary unit (SP2D) are integrated on the SCB of the OptiX 155/622H.
2.3.6 Auxiliary Boards
The OptiX 155/622H supports auxiliary boards such as the environmental monitoring board and fan board.
2.3.7 Power Units
The OptiX 155/622H supports power units such as the POI/POU, 220 V assembly chassis and UPM.
2.3.1 SDH Boards
The OptiX 155/622H supports STM-1/STM-4/STM-16 line boards.
Table 2-2 provides the names and descriptions of the SDH boards that the OptiX 155/622H supports and the slots valid for the SDH boards.
Table 2-2 SDH boards supported by the OptiX 155/622H
Board Description Valid Slot
OI16D 2xSTM-16 optical interface board The OI16D is integrated with the SCB.
OI4 1xSTM-4 optical interface board IU1, IU2, and IU3
OI4D 2xSTM-4 optical interface board IU1, IU2, IU3, or integrated with the SCB
OI2S 1xSTM-1 optical interface board IU1, IU2, and IU3
OI2D 2xSTM-1 optical interface board IU1, IU2, IU3, or integrated with the SCB
SL1Q 4xSTM-1 optical interface board IU4 SL1O 8xSTM-1 optical interface board IU4 SB2L 1xSTM-1 single-fiber bidirectional
optical interface board
IU1, IU2, and IU3
SB2R 1xSTM-1 single-fiber bidirectional optical interface board
IU1, IU2, and IU3
SB2D 2xSTM-1 single-fiber bidirectional optical interface board
IU1, IU2, and IU3
SLE 1xSTM-1 electrical interface board IU1, IU2, and IU3
Board Description Valid Slot SDE 2xSTM-1 electrical interface board IU1, IU2, and IU3
2.3.2 PDH Boards
The OptiX 155/622H supports the PDH boards that operate at different rates and have different impedances.
The PDH boards are used to access E1, E1/T1, and E3/T3 tributary services.
Table 2-3 provides the names and descriptions of the PDH boards that the OptiX 155/622H supports and the slots valid for the PDH boards.
Table 2-3 PDH boards supported by the OptiX 155/622H
Board Description Valid Slot
SP1S 4xE1 electrical interface board IU1, IU2, and IU3 SP1D 8xE1 electrical interface board IU1, IU2, and IU3
SP2D 16xE1 electrical interface board IU1, IU2, IU3, or integrated with the SCB
PD2S 16xE1 electrical interface board IU4 PD2D 32xE1 electrical interface board IU4 PD2T 48xE1 electrical interface board IU4 SM1S 4xE1/T1 electrical interface
board
IU1, IU2, and IU3
SM1D 8xE1/T1 electrical interface board
IU1, IU2, and IU3
PM2S 16xE1/T1 electrical interface board
IU4
PM2D 32xE1/T1 electrical interface board
IU4
PM2T 48xE1/T1 electrical interface board
IU4
PE3S 1xE3 electrical interface board IU1, IU2, and IU3 PE3D 2xE3 electrical interface board IU1, IU2, and IU3 PE3T 3xE3 electrical interface board IU1, IU2, and IU3 PT3S 1xT3 electrical interface board IU1, IU2, and IU3 PT3D 2xT3 electrical interface board IU1, IU2, and IU3
Board Description Valid Slot PT3T 3xT3 electrical interface board IU1, IU2, and IU3
2.3.3 Data Boards
The OptiX 155/622H supports the data boards that provide the transmission function and switching function.
Table 2-4 provides the names and descriptions of the data boards that the OptiX 155/622H supports and the slots valid for the data boards.
Table 2-4 Data boards supported by the OptiX 155/622H
Board Description Valid Slot
ET1 8-port Ethernet service interface board
IU4
ET1O 8-port Ethernet service electrical interface board
IU4
ET1D 2-port Ethernet service electrical interface board
IU1, IU2, and IU3
EF1 6-port Ethernet service interface board
IU4
ELT2 2-port 100M Ethernet optical interface board
IU1, IU2, and IU3
AIUD 2-port ATM interface board IU4
AIUQ 4-port ATM interface board IU4
SHLQ Single-pair high-speed digital subscriber line board
IU1, IU2, and IU3
EFS 4-port Ethernet service switching board
IU1, IU2, and IU3
EFS4 4-port Ethernet service switching board
IU1, IU2, and IU3
EFT 4-port Ethernet service interface board
IU1, IU2, and IU3
EGS 1-port 1000M Ethernet service switching board
IU1, IU2, and IU3
EFSC 12-port Ethernet service switching board
IU4
EGT 1-port 1000M Ethernet transparent transmission board
IU1, IU2, and IU3
Board Description Valid Slot N64 Nx64 kbit/s interface board IU1, IU2, and IU3 N64Q 4xNx64 kbit/s interface board IU1, IU2, and IU3 FP2D 16xFramed E1 electrical interface
board
IU1, IU2, and IU3
TDA Multiple-channel audio and data access board
IU4
2.3.4 Packet Boards
The OptiX 155/622H supports the packet boards that operate at different rates.
Table 2-5 provides the names and descriptions of the packet boards that the OptiX 155/622H supports and the slots valid for the packet boards.
Table 2-5 Packet boards supported by the OptiX 155/622H
Board Description Valid Slot
CXP Integrated mixed-service
processing board
IU4
2.3.5 Cross-Connect and System Control Board
The system control and communication unit (SCC), cross-connect unit (XC), synchronous timing generator (STG), engineering orderwire unit (EOW), STM-1/STM-4/STM-16 line unit (OI2D/OI4D/OI16D), and E1 tributary unit (SP2D) are integrated on the SCB of the OptiX 155/622H.
Table 2-6 provides the name and description of the cross-connect and system control board that the OptiX 155/622H supports and the slot valid for the cross-connect and system control board.
Table 2-6 Cross-connect and system control board supported by the OptiX 155/622H
Board Description Valid Slot
SCB System control board SCB
2.3.6 Auxiliary Boards
The OptiX 155/622H supports auxiliary boards such as the environmental monitoring board and fan board.
Table 2-7 provides the names and descriptions of the auxiliary boards that the OptiX 155/622H supports and the slots valid for the auxiliary boards.
Table 2-7 Auxiliary boards supported by the OptiX 155/622H
Board Description Valid Slot
EMU Environmental monitoring
board
IU3
FAN Fan board FAN
2.3.7 Power Units
The OptiX 155/622H supports power units such as the POI/POU, 220 V assembly chassis and UPM.
Table 2-8 provides the names and descriptions of the power units that the OptiX 155/622H supports and the slots valid for the power units.
Table 2-8 Power units supported by the OptiX 155/622H
Board Description Valid Slot
POI/POU Power board POI/POU
UPM Dedicated power system
-220 V assembly chassis
Built-in assembly
-3 SDH Boards
About This Chapter
This topic describes the SDH boards at the STM-1/STM-4/STM-16 levels.
3.1 OI16D
This topic describes the version, functions, working principle, front panel, valid slots, and technical specifications of the OI16D.
3.2 OI4/OI4D
This topic describes the version, functions, working principle, front panel, valid slots, and technical specifications of the OI4/OI4D.
3.3 OI2S/OI2D/SL1Q/SL1O
This topic describes the version, functions, working principle, front panel, valid slots, and technical specifications of the OI2S/OI2D/SL1Q/SL1O.
3.4 SB2D/SB2R/SB2L
This topic describes the version, functions, working principle, front panel, valid slots, and technical specifications of the SB2D/SB2R/SB2L.
3.5 SLE/SDE
This topic describes the version, functions, working principle, front panel, valid slots, and technical specifications of the SLE/SDE.
3.1 OI16D
This topic describes the version, functions, working principle, front panel, valid slots, and technical specifications of the OI16D.
3.1.1 Version Description
The OI16D is integrated with the SCB and does not have an independent version.
3.1.2 Functions and Features
The OI16D transmits and receives 2xSTM-16 optical signals, performs O/E conversion for the STM-16 optical signals, extracts and inserts overhead bytes, and generates alarm signals on the line.
3.1.3 Working Principle and Signal Flow
The OI16D consists of the O/E converting module, data and clock restoration module, SDH overhead processing module, logic control module, and power unit.
3.1.4 Front Panel
The OI16D does not have an independent front panel because it is integrated with the SCB.
3.1.5 Feature Code
The number code that follows the board name in the bar code is the feature code of the board.
The feature code indicates the type of optical interface.
3.1.6 Valid Slots
The OI16D does not have an independent slot because it is integrated with the SCB.
3.1.7 Parameter Settings
You can set the parameters for the OI16D by using the T2000.
3.1.8 Technical Specifications
The OI16D is integrated with the SCB. This topic provides the parameters specified for the optical interfaces of the OI16D. For the other technical specifications of the OI16D, see the topic that describes the technical specifications of the SCB.
3.1.1 Version Description
The OI16D is integrated with the SCB and does not have an independent version.
3.1.2 Functions and Features
The OI16D transmits and receives 2xSTM-16 optical signals, performs O/E conversion for the STM-16 optical signals, extracts and inserts overhead bytes, and generates alarm signals on the line.
The OI16D is a 2xSTM-16 optical interface board. The OI16D is integrated with the SCB. When an LC optical connector is used, the maintenance of the optical module is convenient.
Table 3-1 provides the functions and features of the OI16D.
Table 3-1 Functions and Features Functions and
Features OI16D
Basic functions Transmits and receives 2xSTM-4 optical signals.
Specifications of the optical interface
Supports standard optical interfaces, namely, the S-16.1. The characteristics of the optical interfaces comply with ITU-T G.957.
Functions of the optical module
Provides the automatic laser shutdown (ALS) function.
The optical interface supports the function of setting the on/off state of a laser.
Service processing
Supports the processing of the VC-12, VC-3, and VC-4 services.
Time
synchronization function
Supports the high-precision time synchronization function to realize the synchronization of time over the entire network.
Overhead processing
l Processes the section overheads of STM-16 signals.
l Processes higher order path overheads.
l Supports the setting of byte reporting, byte transmitting, and K-byte passing-through.
l Provides the transparent data communication channel (DCC) and orderwire byte channel.
l Supports the setting and querying of the J0/J1/C2 byte.
Pointer processing
Processes the AU pointer.
Alarms and performance events
Provides rich alarms and performance events, thus facilitating the management and maintenance of the equipment.
Protection modes
l Supports the sub-network connection protection (SNCP).
l Supports the MSP ring
l Supports the linear MSP Maintenance
features
l Supports inloop and outloop at optical interfaces.
l Supports inloop and outloop on VC-4 paths so that faults can be located quickly.
l Supports the setting of the overhead byte to be sent/received.
l Supports the setting of the enabled state of the synchronization status message (SSM) on the line optical interface.
l Supports the pass-through test of the line K bytes.
l Supports the setting of the bit error threshold-crossing values and degrade thresholds.
l Provides the ALS function.
3.1.3 Working Principle and Signal Flow
The OI16D consists of the O/E converting module, data and clock restoration module, SDH overhead processing module, logic control module, and power unit.
Figure 3-1 shows the functional block diagram of the OI16D.
Figure 3-1 Functional block diagram of the OI16D
Data and clock
The O/E converting module converts a received STM-16 optical signal into an STM-16 electrical signal and sends the STM-16 electrical signal to the data and clock restoration module. The R_LOS alarm signal can be detected in the O/E converting module. The data and clock restoration module restores the clock signal and sends the clock signal and the STM-16 electrical signal to the SDH overhead processing module. Then, the SDH overhead processing module extracts the overhead bytes from the received STM-16 signal and sends the payload signal to the cross-connect unit through the backplane. The R_LOF alarm signal, R_OOF alarm signal, and other alarm signals are detected in the SDH overhead processing module.
Transmit Direction
The SDH overhead processing module inserts the overhead bytes into the electrical signal sent from the cross-connect unit and sends the electrical signal to the E/O converting module. Then, the E/O converting module converts the STM-16 electrical signal into an STM-16 optical signal and sends the STM-16 optical signal to fibers for transmission.