Phoner is a Windows application, a so called SoftPhone, that enables to phone using an ISDN card and sound card. The connection to analogue (POTS) and digital receivers (ISDN) is built up by using CAPI. This driver interface comes with your ISDN equipment.
Phoner establishes for outgoing calls a (chargeable) connection over your normal phone line. The charge will be the same as using your normal phone device.
Since version 1.66 you can use VoIP (Voice over IP) by establishing connections to other SIP (Session Initiation Protocol) users.
