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| Standard Code | Standard Title | Standard Class | Order |
|---|---|---|---|
| GB/T 5442-1985 |
The test methods for the technical specifications of inband pulsing single frequency line signalling system for automatic telephone switching network 电话自动交换网带内单频脉冲线路信号技术指标测试方法 |
China National Standards inband |
 English PDF |
| GB 3376-1982 |
inband pulsing single frequencyline signalling system for telephone automatic switching network 电话自动交换网带内单频脉冲线路信号方式 |
China National Standards inband |
English PDF |
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