当传输失败时，可以为已建立连接的备份通道增加选项。

Add the option for a backup channel that is already connected for the Failover transport.

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为了增加选项和摘要特性，在生成VXML时需要做几件事。

To add options and the summary feature, you need to do a few things when you generate the VXML.

youdao

为了增加选项和摘要特性，在生成VXML时需要做几件事。

To add options and the summary feature, you need to do a few things when you generate the VXML.

youdao