About 1,600 of the stores will offer demonstrations of the technology starting in July, the companies said Thursday. Those stores are located in areas that have a high number of DSL (digital subscriber line) customers.
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Voice over Internet Protocol (VoIP) services allow people to make and receive phone calls using a high-speed Internet connection instead of a traditional phone line. Telecommunications companies areas a way to cut costs on international and long-distance calls.
But while the service is gaining in popularity, RadioShack said consumers may still need some hand-holding before the technology becomes widespread.
"The low yet rapidly growing number of subscribers shows that broadband phone service is still in the early-adoption phase of the technology," Stu Asimus, RadioShack's chief merchandising officer, said in a statement. "VoIP is simply not quite ready for a self-service environment."
Vonage's monthly service plans start at $14.99. The plans include features such as caller identification, call waiting, voice mail, call forwarding and emergency calling.