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(SOFTware PHONE) An application in the user's computer for making phone calls over the Internet. Known as a "voice over IP" (VoIP) service, computer users have a choice of audio hardware, including microphone and speakers, headset, Bluetooth phone or an IP phone connected via USB (see USB phone).

Softphone functionality is also available for smartphones and tablets, and these mobile devices only require the installation of a VoIP app.

Softphones can work stand-alone or be part of an IP PBX family. They offer the full range of phone features, such as call forwarding and conference calling. They may also interface with applications such as Outlook for automatic phone dialing. See VoIP, IP phone, IP PBX and IP telephony. See also software-defined radio.

One of the First SoftPhones
Launched in 1996 with ads to support its low rates, Net2Phone was one of the first software-only VoIP services. (Image courtesy of Net2Phone, Inc.,
References in periodicals archive ?
Through this smartphone, a softphone, users can take advantage of all VirtualPBX features like: centralized voicemail, call recording, direct extension dialing, and more, including outbound calls also use the user s business caller ID moderately than their personal number.
He added that the VoIP Dialing softphone will be "good for calls centers and intranets, and definitely a product that at some point will go to the consumer.
In addition, Bria Android Tablet Edition integrates with hosted and premises-based IP-PBXs, as well other CounterPath Bria desktop and mobile softphones for Android, iOS, Mac, Windows and Linux.
For college students looking to keep in touch with their family members and friends, ITP VoIP offers premium softphone service for a small additional monthly fee.
VoiceServe's VoipSwitch video softphones are built on open standards, using SIP protocols and efficient video codecs that are supported on most mobile devices.
Bria for Linux is also available for embedded products ranging from voice terminals and mobile handsets all the way to set-top boxes in addition to the desktop and laptop softphone versions.
0 has gained increasing recognition as the world's favorite free softphone due to its rich feature list and ease of use.
In addition, the company expects to see adoption of SIP technology in other market sectors because of the cost benefits softphones have to offer.
The softphone also allows users to easily import Outlook and Outlook Express address books.
For more info and to download BT Softphone for a free visit: www.
Messenger, Net2Phone, and Cisco SoftPhone are some examples.
For business-critical softphone applications in contact centers, the DA60 and DA55 USB-to-headset adapters offer additional software and audio controls, including digital signal processing technology for crisp, clear sound.