The 911 service accompanying AT&T's residential Internet phone offering will make its debut in the spring, according to Intrado. A spokesman for AT&T could not be reached for comment.
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While they have been hailed for costing up to 30 percent less than traditional dialing plans, so-called voice-over-Internet Protocol (VoIP) services often do not include the ability to dial 911. The reason is that VoIP calls are routed over the Internet, while most emergency calling centers are only capable of receiving calls using older circuit-switched telephone technology.
Analysts say the ability to dial 911 is considered key if VoIP services are to become more widespread, potentially even replacing a majority of traditional phone lines.
The ability to call 911 also is among the chief reasons state utility regulators and the Federal Communications Commission are debating whether to regulate VoIP, which for the past decade has operated free of the rules that traditional phone companies must follow.
Some VoIP service providers suggest that callers use a cell phone to dial 911, while others have created a way to dial into nonemergency lines at police stations to report emergencies.
