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With 4 telephone interface ports, the GXW4104 FXO Analog Gateway from Grandstream Networks helps bridge the gap between traditional telephones and VoIP phone systems. This gateway supports PSTN/PBX analog trunk lines, along with an SIP trunk interface, to effectively convert traditional PSTN-based telephone calls into a VoIP signal to be transmitted over an IP-based connection. In addition to 4 telephone ports, you can also take advantage of a dedicated video surveillance port complete with support for real-time video feeds, CIF resolution, and a 30fps frame rate.
4 FXO-port media gateway
Video surveillance port
Two RJ-45 ports (switched or routed)
Supports PSTN/PBX analog trunk lines and SIP trunk interface
Multiple SIP accounts and profiles (3 per system)
G.711, G.723, G.729, GSM, and G.726 audio codecs
G.168 ECHO cancellation
Real time G.264 video codec (CIF resolution, up to 30 fps)