What Is This Tool?
This unit converter helps translate data transfer rates from STM-1 (signal), a telecommunications transmission unit, to SCSI (Fast Wide), a legacy storage interface. It aids users in mapping transmission speeds between network backbone signals and storage device interfaces.
How to Use This Tool?
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Enter the value in STM-1 (signal) units you want to convert.
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Choose SCSI (Fast Wide) as the target unit for conversion.
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Click the convert button to see the equivalent value in SCSI (Fast Wide).
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Review example conversions and use cases to understand your results better.
Key Features
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Converts STM-1 (signal) to SCSI (Fast Wide) units accurately using defined conversion rates.
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Provides clear unit definitions and context for telecommunications and legacy storage systems.
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Offers practical examples demonstrating the conversion process.
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Browser-based tool requiring no installation, enabling quick conversions anywhere.
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Supports interoperability planning between SDH backbone links and SCSI storage devices.
Examples
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2 STM-1 (signals) convert to 1.944 SCSI (Fast Wide).
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0.5 STM-1 (signal) equals 0.486 SCSI (Fast Wide).
Common Use Cases
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Provisioning 155.52 Mbit/s fiber links in telecom networks using STM-1 signals.
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Aggregating multiple lower-rate channels over SDH backbones.
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Connecting disk drives and RAID controllers with SCSI (Fast Wide) for better throughput in legacy systems.
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Attaching tape drives, CD/DVD drives, or removable media devices benefiting from ~20 MB/s transfers.
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Planning interoperability between telecommunications SDH networks and storage subsystems.
Tips & Best Practices
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Confirm the unit definitions and context before performing conversions to ensure correct application.
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Use the conversion as an initial estimate, especially when planning system interoperability.
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Consider implementation factors like cable length and device negotiation that affect real SCSI throughput.
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Double-check your conversions with actual hardware performance data when possible.
Limitations
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Theoretical conversions may differ from actual performance due to hardware and signaling variations.
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STM-1 rates use bits per second while SCSI throughput is in bytes, requiring attention in interpretation.
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Practical SCSI (Fast Wide) performance can be influenced by electrical signaling, cable types, and device negotiation.
Frequently Asked Questions
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What does STM-1 (signal) represent?
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STM-1 (signal) is the basic transmission unit of the Synchronous Digital Hierarchy, carrying a synchronous framed signal at 155.52 Mbit/s and often used as a building block for higher-frequency SDH signals.
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What is SCSI (Fast Wide)?
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SCSI (Fast Wide) is a SCSI-2 interface mode that combines 10 MHz Fast timing with a 16-bit wide data bus, achieving up to 20 megabytes per second throughput in theory.
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Why convert from STM-1 (signal) to SCSI (Fast Wide)?
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Converting between these units helps translate telecom backbone transmission rates to legacy storage interface speeds, assisting in system design and interoperability across networks and storage devices.
Key Terminology
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STM-1 (signal)
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The fundamental transmission unit of SDH transmitting at 155.52 Mbit/s, corresponding to SONET OC-3.
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SCSI (Fast Wide)
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A SCSI-2 mode combining 10 MHz Fast timing and a 16-bit data bus to reach up to 20 MB/s throughput.
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Data Transfer Rate
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The speed at which data is transmitted between devices, commonly measured in bits or bytes per second.