The Cisco adapter runs perfectly on my IP-based telecom voice / VDSL connection. I have already sent and received multi-page faxes. Everything is as it should!
The installation work was very high. "Just plug and losfaxen / phone" does not work with security. The device is provided with US phone settings. Even the much-needed firmware update creates since no remedy. But on Google you will find very good up aids.
Despite the extensive facility, I think the machine for a very good solution if you need a fax machine and features a VoIP connection. So strong buy recommendation!