手机版支持连锁呼叫（call chains）功能，并且你可以选择拨打电话时显示的号码。

Besides call chains, another nice feature of Ribbit Mobile is that you can choose which number will appear on your contacts' phones when you call, even if you are calling from your computer.

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如果未听到拨号音，表明您所在单位或您的电话可能不支持这种对外呼叫类型，或需要额外的访问号码。

If you don't hear a dial tone, your organization or telephone might not support this type of outside call, or might require an additional access code.

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交换机支持基于策略的路由，其中根据域名，电话号码和类似内容选择具体路由路径。

The switch's supports policy based routing where specific routing paths are selected based a domain name, a telephone number, and the like.

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