|
SDH环网保护倒换测试方法
Test methods of protection schemes for SDH rings
价格:¥0.00
|
|
|
|
|
|
数字交换机模拟接口测试方法及模拟接口(二线或四线)间传输特性的测试方法
Test method of digital exchange analog interfaces and test method of transmission characteristics between (2-wire or 4-wire) analog interfaces
价格:¥0.00
|
|
|
|
|
|
波分复用系统(WDM)光安全进程技术要求
Technical specification for optical safe procedure for Wavelength Division Multiplexing(WDM) system
价格:¥0.00
|
|
|
|
|
|
提供公用电信业务的用户驻地网技术要求和测试方法
Technical requirements and testing methods for CPN providing public telecommunication services
价格:¥0.00
|
|
|
|
|
|
低压电力线和信号线上短持续时间瞬变信号的测量方法导则
价格:¥0.00
|
|
|
|
|