Vfone is an easy to use sip softphone with Audio&Video intercom features.
This app allows you to make and receive calls from anywhere.The app fully supports off-line push, allowing your device to be on standby when not in use and save battery life.
Functions include:
--make and receive calls
--monitor door phones (typically Akuvox Door Unit)
--open relay in talking page or monitor page
--send and receive text messages