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数字网内时钟和同步设备的进网要求
Requirements for clock and synchronization equipment used in the digital network
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脉冲编码调制通信系统系列
Pulse code modulation communication system hierarchy
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采用数据链路协议的会议电视 远端摄像机控制规程
A far end camera control protocol for videoconferences using data link protocol
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漏泄电缆无线通信系统总规范
General specification for leaky cable radio communication system
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使用2Mbit/s以内数字信道的视听系统多点控制设备
Multipoint control units for audiovisual systems using digital channels up to 1920kbit/s
价格：￥0.00
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接入网与IP互通V5.2用户适配层(V5UA)技术要求
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ISDN信令与IP互通用户适配层(IUA)技术要求
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