PC-Telephone 7.0 Selectra Ltd    

... fax-pc, SIP-telephone, sip-to-phone calls over Internet/VoIP or ISDN/PSTN telephone networks. Use your computer as internet telephone, USB phone, USB handset, ISDN telephone, ISDN fax, answer phone, fax software, voicemail, caller ... call forwarding, call waiting, call accounting, call recording, telephone exchange/PBX, etc. Works with all Firewalls, NAT and .... Free download of PC-Telephone 7.0

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