A softphone is a piece of software that offers the possibility to use IP telephony without physical IP telephones. In a first step, the soft phone needs to be installed on a PC, laptop or similar device. The user interface of a soft phone often looks like that of a desk phone. Usually it provides even a dialpad. Anyways, dialing happens via the computer keyboard. Microphone and speakers or a headset are used for audio in and output.
Technically everything happens exactly the same way as with an ordinary VoIP telephone. A session is initiated with the SIP protocol the and RTP is used to transfer the audio. The configuration within an IP PBX phone system, like AskoziaPBX, is the same as for hardware phones. After creating an account, the softphone is registered at the phone system. Most softphones support features like call forwarding and pick up.
Softphones are available for all major operating systems as free and commercial solutions. Below you find a list of softphones which can be used with AskoziaPBX.