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Table 1 Device-level protection provided by the OptiX OSN1500
| Business Area | Protection Type | Description |
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| Ethernet (TDM mode) | BPS protection | BPS protects the services of the whole Ethernet single board. When the working single board fails, BPS enables the services of the working single board to be transferred to the standby single board within a time acceptable to the customer, realizing 1+1 board-level protection for important services. |
| PPS Protection | PPS protects the services on specific ports. When the working port fails, PPS enables the services to be transferred to the standby port within a time acceptable to the customer, realizing 1+1 port protection for important services. | |
| LAG Protection | LAG bundles multiple physical links connected to the same device into one logical link, which is used to enhance link bandwidth and reliability. | |
| DLAG Protection | DLAG aggregates two corresponding ports distributed on two identical single boards into a protection group, realizing 1+1 protection for inter-board ports. | |
| Other | TPS Protection | TPS protection enhances the reliability of services on each work processing board in the TPS protection group. When the work processing board fails, TPS protection can quickly invert the service signals from the interface board to the work processing board to the protection processing board to realize the protection of services. |
| SDH/ATM Single Board 1+1 Protection | Some SDH/ATM single boards in OptiX OSN equipment support 1+1 board-level protection.
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| 1+1 hot backup for crossover, clock and master control unit | Crossover, clock and master control units are provided by CXL series single boards, which adopt 1+1 hot backup to protect crossover unit, clock unit and master control unit at the same time.
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| Wavelength Conversion Unit 1+1 Protection |
In OptiX OSN equipment, the arbitrary rate wavelength conversion board N1LWX includes two types of single boards:
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| Power input unit 1+1 hot backup |
Through two PIU single boards, two -48V/-60V DC power supplies can be fed at the same time. The two power supplies are backups for each other, if any one of them fails, the other one will be put into working state, which can still ensure the normal operation of the equipment. When the two external power supply voltages are equal, the two backup PIU boards share half of the current each. When the difference between the two external power supply voltages is greater than 0.7V, the PIU board with higher external voltage will bear the total current of the equipment, and the PIU board with lower external voltage will not pass any current. When only one PIU veneer is working, the subrack power supply is not affected. Description:
Veneer configuration is different, the total power consumption and current of the device are different, and the current value of the PIU veneer is also different.The specific current value of the PIU veneer should be calculated according to the actual configuration. |
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| Single board +3.3V power supply 1:N protection | Through the power backup unit of AUX board, it provides 1:N reliable power backup for the +3.3V power supply of other single boards (including all service single boards and main control boards), so that the backup power supply will be put into operation when the power supply of the single board fails, which still ensures the normal operation of the single board. | |
| Intelligent Fan | The fan unit adopts six intelligent fans to dissipate heat for the system, and the power supplies of the six fan modules are backup for each other. The intelligent fans can realize intelligent high-speed rotation and stop function, OptiX OSN1500 has a stop fan operation interface, when the power is too low, the software control part of the fan will stop. | |
| Protection of single board under abnormal condition |
The protection methods under abnormal conditions include power failure protection during software loading, power under-voltage or over-voltage protection, over-temperature alarm and other single-board protection methods. Power failure protection during software loading Application programs and data have checksum functions. After the interruption of loading, BIOS (Basic Input/Output System) will not start the programs and data that have not been loaded successfully, but wait to continue loading until the software is loaded successfully. Provide over-voltage and under-voltage protection for power supply There are lightning protection devices on the power supply board, which can effectively inhibit the harm that may be caused by instantaneous high voltage (e.g. lightning strike). The single board will automatically reset the CPU (Center Processing Unit) when the voltage is too low and the software reinitializes the chip. The power supply system will automatically cut off the main circuit power supply when the voltage is too low, so that the system is protected. Provide temperature detection function of single board A temperature detection circuit is designed on the single boards with large heat generation (such as cross-clock boards, etc.), which generates an alarm when the ambient temperature of the single board is too high and reminds the maintenance personnel to clean up the fan. |
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Description:
The OptiX OSN1500 device supports the coexistence of three different types of TPS protection groups. |
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