PSTN
abbr. 公共交换电话网（Public Switched Telephone Network）
例句
PSTN signaling USES tones generated by the phone to begin or end a call.
PSTN信令通过使用手机产生的声调来开始或结束通话。
This paper introduces the method to implement the remote networking with PSTN.
介绍了使用PSTN实现远程联网的方法。
Still im-age is at first compressed by using JPEG algorithm, and then transfered via PSTN.
图像经JPEG压缩后通过公众电话网进行远程传输。
