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This is a telephone which you can use via a normal telephone line and also the
Internet.
When you call to a normal telephone, this one uses a Packet Switching
Telephone Network (PSTN) which is a normal telephone line. When you call to
another SIP telephone, this telephone uses the Internet. All you have to do is
to click the receiver's email address (which means a IP address) and it will
dial automatically from your email address book.
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