ActFax and VoIP (Voice over IP)
ActFax can not only be used with traditional analog and ISDN (T1/E1) phone lines, it is also possible to run ActFax directly through VoIP (Voice over IP) and FoIP (Fax over IP).
VoIP Interface Software
When sending fax documents through VoIP, the quality of the VoIP connection has great unfluence on the success rate of fax transmissions. It is recommended to use VoIP gateways supporting the T.38 protocol (Fax over IP), to guarantee failure-free data exchange between the fax server and the IP gateway. If the T.38 protocol is not supported by the VoIP gateway, a speech channel (G.711 protocol) is used for fax transmissions. In such a case, the success rate of the fax transmissions mainly depends on the quality of the VoIP connection; this is because run-time of data packets submitted in IP networks is variable. We recommend to contact your provider to make sure your VoIP connection is compatible with fax transmissions in that case.