Is there a limit on the length of a FreeConferenceCallHD conference call? How do I sign up for a FreeConferenceCallHD account?Ĭlick on the sign up button from the home page, fill out the registration form and you will be provided with an account immediately. FreeConferenceCallHD is a free conferencing service supporting high definition voice quality and allowing for users to join a conference call via a variety of phones, such as PSTN, softphone, hard phone and custom PBX.