Noun
English Wikipedia has an article on:softphoneWikipedia
softphone (plural softphones)
A software program for making telephone calls over the Internet.
No SIP phone support or softphone. Source: Internet
The desktop and mobile apps give you access to the Phone.com softphone as well as features such as SMS, conference calling, inbox and call logs, and your address book. Source: Internet
The softphone user interface often looks like a telephone handset with a touchpad and caller ID display. Source: Internet
The softphone user interface often resembles a phone handset, with a touchpad and caller ID display. Source: Internet