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电话机型号命名方法
Type designation system for telephone sets
参考页数:2P.;A4
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电话交换附属设备型号命名方法
Type designation for accessory equipments of telephone exchange
参考页数:3P.;A4
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电话交换机型号命名方法
Type designation system for telephone switchboards
参考页数:2P.;A4
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620 KHz衰减器主要技术要求
Main technical requirement for 620KHz attenuator
参考页数:3P.;A4
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620 KHz选频电平表主要技术要求
Main technical requirement for 620KHz selective level meter
参考页数:5P.;A4
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通信设备过电压保护用半导体管
Semiconductor arrester for The over-voltage protection of telecommunications installations
参考页数:14P.;A4
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N-ISDN 第二类网络终端(NT2 型)设备ISDN 用户交换机技术规范
Technical specification for ISDN PABXs
参考页数:22P.;A4
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电话网上音频调制解调器承受传输损伤能力的基本要求
Basic requirement for ability of telephone online audio modem to withstand transmission impairments
参考页数:11P.;A4
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投币电话机技术条件
The specifications for coin box telephone set
参考页数:15P.;A4
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室内电话机插头座
Jack and Plug For Indoor Telephone
参考页数:11P.;A4
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