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与承载无关的呼叫承载控制规范
Beaer independent call bearer control specification
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公用IP语音交换机设备技术要求
Technical specification for public IP voice switch
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1号数字用户信令系统(DSS1)--用于ISDN电信业务的DSS1业务指示编码
Digital subscriber signalling system No.1 (DSS1)-typical DSS1 service indicator codings for ISDN telecommunications services
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在公用电话网上数据传输启动会话期规程
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接入网技术要求——甚高速数字用户线(VDSL)
Access network technical specifications -- very-high-speed Digital Subscriber Line
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舰船有线对讲系统通用规范
General specification for wired talk-back system on shipboard
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