利用扩展AT命令的实现原理，完善了对AT模块软件的设计，并最终实现了通话管理的主要功能。

By using the realization principles of the expanded at commands, it perfects the design of at module and ultimately achieves the main functions of call management.

youdao

利用扩展AT命令的实现原理，完善了对AT模块软件的设计，并最终实现了通话管理的主要功能。

By using the realization principles of the expanded at commands, it perfects the design of at module and ultimately achieves the main functions of call management.

youdao