Following is an overview of how the analog PSTN implements signaling and media transport operations.

以下是如何实现的模拟PSTN信令和媒体传输操作的概述。

youdao

Following is an overview of how the analog PSTN implements signaling and media transport operations.

以下是如何实现的模拟PSTN信令和媒体传输操作的概述。

youdao