|
电信.网络性能.扩展数字网络的损耗计划
Telecommunications – Network Performance – Loss Plan for Evolving Digital Networks
参考页数:
|
|
|
|
|
|
通信系统中语音清晰度的测量用方法
American National Standard Method for Measuring the Intelligibility of Speech over Communication Systems
参考页数:34P.;A4
|
|
|
|
|
|
与语音干扰相关的额定噪声
Rating Noise with Respect to Speech Interference
参考页数:
|
|
|
|
|
|
电信.用标准量块(MNBs)对电话频带语音质量进行客观测量
Telecommunications - Objective Measurement of Telephone Band Speech Quality Using Measuring Normalizing Blocks (MNBs)
参考页数:
|
|
|
|
|
|
不平衡电压数字型接口电路的电性能
Electrical Characteristics of Unbalanced Voltage Digital Interface Circuits
参考页数:
|
|
|
|
|
|
电信.第1部分:同步光纤网络(SONET).第04节:数据通信频道协议和体系结构
Telecommunications – Synchronous Optical Network (SONET) – Data Communication Channel Protocols and Architectures
参考页数:24P.;A4
|
|
|
|
|
|
数字网中交换设备时钟性能测试方法
Test methods for the performances of switching equipment clocks in digital network
价格:¥0.00
|
|
|
|
|
|
|
8448 kbit/s 正码速调整二次群数字复用设备技术要求和测试方法
Performance and test methods of the second order digital multiplex equipment operating at 8448 kbit/s and using positive justification
价格:¥0.00
|
|
|
|
|
|
电话自动交换网用户信号技术指标测试方法
The test methods for the technical specifications of subscriber line signalling for automatic telephone switching network
价格:¥0.00
|
|
|
|
|