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US08031855B2 Method for providing enhanced directory assistance upon command using out-of-band signaling 失效
用于使用带外信令的命令提供增强的目录辅助的方法

Method for providing enhanced directory assistance upon command using out-of-band signaling
Abstract:
A user calls a directory assistance service provider to search for a desired telephone number and be connected to a party at the desired number. In one such connection, the user is afforded enhanced directory assistance upon a user command in the form of an out-of-band signaling message, e.g., SS7 signaling message. For example, the user may be afforded further operator assistance by pressing on the user telephone a predetermined key (e.g., “*” key), which is detectable by the directory assistance service provider as an SS7 signaling message.
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