Definition of "softphone" []

• A software program for making telephone calls over the Internet (noun)

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• "If your company uses Voice over IP VoIP phones, chances are there's what's called a softphone - a program that lets you make and receive phone calls from your office number on your laptop - that you can install."
• "A Smartphone owner can download and install a SIP phone application (also known as softphone) from numerous companies on the web"
• "In other news, Vonage is going to support the XTen Pro softphone which is currently available for Windows XP and Pocket PC 2002."