摘要
在我国现有硬件基础设施基本具备的条件下,利用传统的公众电话交换网资源,提出了一套对无人值守环境实施远程监控的方案,此方案经济、可靠,具有很强的实用价值。
The article raised controlling plan which need not anybody to be seen the environment use in a long distance under the present circumstance of hard terms and used the traditional and public exchanged phone net. The plan is economical and dependable, and it also has a great use value.
出处
《河北省科学院学报》
CAS
2006年第4期39-41,共3页
Journal of The Hebei Academy of Sciences
关键词
无人值守环境
公众电话交换网
双音多频
The environment which need not anybody to see
The exchanged net for public phone
Double audio frequency
