Hitachi Rolls Out Compact SIP Gateway
The NT-4S includes four CO-facing ports to packetize the voice traffic coming out of conventional PBX equipment.Add Hitachi to the ranks of VOIP gateway manufacturers. The NT-4S from Tokyo-based Hitachi Communication Technologies Ltd. is a SIP (RFC3261) gateway with four CO-facing ports to packetize the voice traffic coming out of conventional PBX equipment. Read more here about companies touting VOIP gateways as a way to switch to IP telephony.
The compact device measures 210 millimeters by 166 mm by 40 mm, weighs 1kg and is equipped with a G.711 (uncompressed, 64 kbps) and G.729a (compressed, 8kbps) voice codec. It includes a G.165-compliant line echo canceller.