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一级基准时钟设备技术要求及测试方法
价格:¥0.00
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通信电缆——无线通信用50Ω泡沫聚乙烯绝缘编织外导体射频同轴电缆
Telecommunication cable -- Foamed polyethylene dielectric, braided outer conductor, 50 ohm radio frequency coaxial cable for wireless telecommunication
价格:¥0.00
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基于SIP协议的IP用户终端设备技术要求
The Requirements for SIP-Based IP User Terminal Device
价格:¥0.00
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基于MGCP协议的IP用户终端设备技术要求
The Requirements for MECP-Based IP User Terminal Device
价格:¥0.00
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基于H.323协议的IP用户终端设备技术要求
The Requirements for H.323-Based IP user Terminal Device
价格:¥0.00
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基于H.248协议的IP用户终端设备技术要求
The Requirements for H.248-Based IP User Terminal Device
价格:¥0.00
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XL923系列"三圈一器"联合装置的技术要求与测试方法
价格:¥0.00
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通信设备用铃流信号发生器
Ring generator for telecommunication equipment
价格:¥0.00
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