... voice service Anonymous call, Direct IP Call and Busy tone Fax over IP and Three –way conferences Multiple FXS ports optionalDAG 2000 ... waiting, Call display etc standard voice service and Busy tone, Fax over IP, Three-way conference . Support PPPoE client , ensure voice ... ,BT,NTT, and, DTMF-based CIDPolarity ReversalYesHomologationSafetyULComplianceFCC,CE 32 FXS VoIP Gateway Support Fax Over IP