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| 1. | The test methods for 60-channel symmetrical cable carrier telephone equipment |
| GB/T4770.3-1984对称电缆60路载波电话设备主要性能的测试方法 |
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| 2. | high-frequency symmetrical cable |
| 高频对称电缆 |
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| 3. | Cable is not symmetrical: Downstream speeds far outpace upstream speeds. |
| 线缆是不对称的：下行速度远远快于上行速度。 |
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| 4. | Immunity specification of symmetrical cable carrier system to the interference from the radio broadcasting |
| GB/T7433-1987对称电缆载波通信系统抗无线电广播和通信干扰的指标 |
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