PC-Telephone 7.2 screenshot

PC-Telephone 7.2 full

Free PC-to-PC and cheap PC-to-phone/fax calls over Internet or ISDN/PSTN telephone networks. It turns the computer into a VoIP/SIP phone, ISDN phone/fax, voicemail, SIP server/registrar, VoIP switch/PBX and more. USB phone/headset support.