YD/T 1142-2001.Technical Requirements and Testing Method for IP Telephony Catekeeper. 1范围 YD/T 1142规...
YD通讯标准
YD通讯标准
YD通讯标准
YD/T 1142-2005 IP 电话网守设备技术要求和测试方法
YD/T 1142-2005.Technical requirements and testing methods for IP telephony gatekeeper. 1范围 YD/T 1142...