参数是一个整数，表示通道号。

This parameter should be an integer, representing the channel number.

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通道号是标识消息主题的头部号(如‘气象报告’或‘交通信息’)。

A Channel number is a header number identifying the message topic (such as' Weather Report 'or' Traffic Information ').

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小区广播消息按主题分类，给每条消息都分配了通道号、消息代码、更新号和语言。

Cell broadcast messages are classified by topic and allocated a channel number, message code, update number, and language.

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小区广播消息按主题分类，给每条消息都分配了通道号、消息代码、更新号和语言。

Cell broadcast messages are classified by topic and allocated a channel number, message code, update number, and language.

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