| 序号 | 型号 | 描述 | 大小 | 厂家Logo | 下载 |
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| 1 | IDT82P2821 | 21(+1) Channel High-Density T1/E1/J1 Line Interface Unit | 1553K |
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| 2 | IDT82P2821BH | 21(+1) Channel High-Density T1/E1/J1 Line Interface Unit | 1553K |
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| 3 | IDT82P2821BHG | 21(+1) Channel High-Density T1/E1/J1 Line Interface Unit | 1553K |
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