The specifications of automatic telephone set 自动电话机技术条件
Automatic telephone switching system 自动电话交换系统
Automatic telephone trunk network 长途自动电话网
Automatic telephone analyzer 自动化电话分析仪
Automatic telephone exchange 自动电话交换局
Grading standard for stored program control private automatic telephone branch exchange quality 程控用户自动电话交换机质量分等标准
General specification for the key management center in the military digital secure automatic telephone network 军用数字保密自动电话网密钥管理中心通用规范
The test methods for the technical specifications of ringing and tone for automatic telephone switching network 电话自动交换网铃流和信号音技术指标测试方法
The test methods for the technical specifications of subscriber line signalling for automatic telephone switching network 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 inband pulsing single frequency line signalling system for automatic telephone switching network 电话自动交换网带内单频脉冲线路信号技术指标测试方法