JR-904 four ports voice gateway supports SIP or H.323 protocols. It is compatible with various IPPBX and VoIP voice gateway to provide broadband IP voice service.
Support 4 SIP lines.
Support T.38 FAX.
Auto upgrade firmware and configuration file through HTTP, FTP, TFTP.
Support Call forward / transfer / holding / waiting.
Support conference call and voice record.
Support VPN and VLAN.
Built in router and bridge mode.

