Product Description
Digital Link 300-00920-01 Dual Synchronous Serial Interface Card
This is a specialized interface card designed for Digital Link (later ADTRAN) Channel Service Unit/Data Service Unit (CSU/DSU) units. It provides two independent synchronous serial ports, commonly used for T1/E1, fractional T1, or dedicated leased-line data connections in legacy telecom and enterprise networks.
Key Specifications:
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Part Number: 300-00920-01
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Function: Dual synchronous serial interface (likely V.35, RS-530, or RS-422)
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Compatibility: Digital Link/ADTRAN CSU/DSU chassis (specific models vary)
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Ports: Two independent data ports with clocking and control signals
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Typical Use: Connects CSU/DSU to routers, multiplexers, or data terminal equipment
Applications:
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Spare part for maintaining legacy Digital Link/ADTRAN CSU/DSU equipment
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Repair of T1/E1 or dedicated line termination devices in older network installations
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Component salvage for connectors, ICs, or other usable hardware



