PC-Telephone 5.6

Use this program for free PC-to-PC and cheap PC-to-phone, PC-to-fax, phone-to-PC, and fax-to-PC calls over the Internet (with VoIP) or ISDN/PSTN telephone networks. Use your computer as an Internet telephone, a USB phone, an ISDN telephone, and a fax. This application can fax software and has voicemail, caller ID, CLIP/CLIR, audio conferencing, call answer, call transferring, call forwarding, call waiting, call accounting, call recording, and PBX.

Version 5.6 works with all firewalls, NAT, and LAN routers; works with many USB phones; includes PC-Telephone API; has a PC-Telephone fax driver for PC-to-fax communication; has an import/export phone book; has network ID information; and has smart dialing in the phonebar.