What Is This Tool?
This converter allows you to convert data transfer measurements from STM-4 (signal), a standardized optical transmission rate in telecommunications, to SCSI (LVD Ultra160), a parallel storage interface bandwidth metric used in legacy computing environments.
How to Use This Tool?
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Enter the value in STM-4 (signal) unit
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Select STM-4 (signal) as the source unit and SCSI (LVD Ultra160) as the target unit
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Click convert to obtain the equivalent data transfer rate in SCSI (LVD Ultra160)
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Review the result and apply as needed for your planning or analysis
Key Features
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Converts data transfer rates between STM-4 (signal) and SCSI (LVD Ultra160)
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Supports telecom and legacy storage interface units
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User-friendly interface for quick and accurate conversion
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Browser-based tool requiring no installation
Examples
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2 STM-4 (signal) equals 0.972 SCSI (LVD Ultra160) using the conversion factor 1 STM-4 = 0.486 SCSI
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5 STM-4 (signal) equals 2.43 SCSI (LVD Ultra160) by multiplying the STM-4 value by 0.486
Common Use Cases
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Comparing data throughput between optical transport networks and legacy storage devices
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Planning network capacity and storage performance upgrades
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Assessing compatibility between telecom infrastructures and storage I/O systems
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Evaluating legacy backup systems and tape drive throughput for migration planning
Tips & Best Practices
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Consider the difference between STM-4's optical line rate and SCSI’s sustained data throughput
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Use conversions as approximate guides due to differing units and physical characteristics
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Apply conversions primarily for planning or historical performance comparisons
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Verify compatibility of units and devices when integrating telecommunications and storage systems
Limitations
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STM-4 includes overhead in its rate while SCSI measures maximum sustained throughput, so values may not directly reflect usable bandwidth
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Differences in unit types (Mbps vs. MB/s) and physical layer properties affect conversion accuracy
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SCSI (LVD Ultra160) is a legacy standard, limiting its relevance to historical or planning contexts rather than new deployments
Frequently Asked Questions
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What does STM-4 (signal) represent?
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STM-4 (signal) is an optical transmission frame in the Synchronous Digital Hierarchy with a nominal line rate of 622.08 Mbit/s, used for managing and transporting digital traffic in telecom networks.
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What is SCSI (LVD Ultra160) used for?
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SCSI (LVD Ultra160) is a parallel interface standard for storage devices specifying a maximum sustained data transfer rate of up to 160 MB/s, commonly used in legacy storage systems.
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Why should the conversion between STM-4 and SCSI be treated cautiously?
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Because STM-4 includes overhead and measures optical signal rates, while SCSI measures storage throughput, and their differing units mean the conversion is approximate and context-dependent.
Key Terminology
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STM-4 (signal)
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A Synchronous Transport Module level‑4 in SDH with a nominal line rate of 622.08 Mbit/s, used to multiplex and transport digital traffic including payload and overhead.
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SCSI (LVD Ultra160)
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A parallel interface standard using Low Voltage Differential signaling that specifications a bandwidth of up to 160 MB/s for storage device data transfer.
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Data Transfer Rate
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The speed at which data is transmitted between devices, measured differently depending on the medium and protocol.