China Subscriber line sign GB Standards Search Result |
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GB/T 34093-2017 Safety aspects for xDSL signals on circuits connected to telecommunication networks（DSL:Digital Subscriber Line） 与通信网络连接的电路上的xDSL信号的安全性（DSL：数字用户线） - 英文版 |
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GB/T 5444-1985 The test methods for the technical specifications of Subscriber line signalling for automatic telephone switching network 电话自动交换网用户信号技术指标测试方法 - 英文版 |
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GB 3378-1982 Subscriber line signalling system for telephone automatic switching network 电话自动交换网用户信号方式 - 英文版 |
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