Grandstream GXW4104 – 4 Port FXO VoIP Gateway with SIP & Dual Ethernet

The Grandstream GXW4104 FXO VoIP Gateway is a reliable and cost-effective solution designed to bridge traditional PSTN lines with modern SIP-based VoIP systems. Equipped with 4 FXO ports, this gateway enables businesses to connect up to four analog telephone lines to an IP PBX or hosted VoIP service, making it ideal for organizations transitioning to IP telephony.

The Grandstream GXW4104 FXO VoIP Gateway fully supports the SIP protocol (RFC 3261), ensuring compatibility with a wide range of IP PBXs, softswitches, and SIP-based platforms. This flexibility allows seamless integration into existing communication infrastructures.

Featuring dual 10/100 Mbps Ethernet ports, the device supports both LAN and WAN connectivity, offering flexible deployment options for different network environments. The gateway also supports a comprehensive range of voice codecs including G.711, G.723, G.726, G.729, G.728, and iLBC, ensuring high-quality voice performance even under varying network conditions.

For businesses that rely on fax communication, the GXW4104 includes T.38 Fax-over-IP support, with automatic fallback to G.711 for reliable fax transmission. The device also features PSTN failover capability, ensuring uninterrupted communication by automatically routing calls through analog lines in case of VoIP or power failure.

Advanced telephony features such as caller ID, call forwarding, flexible dial plans, and multiple SIP accounts per port enhance usability and control. The inclusion of G.168 echo cancellation and dynamic jitter buffer ensures clear and stable voice communication.

Security is a key strength of the Grandstream GXW4104 FXO VoIP Gateway, with support for SRTP, TLS, and SIPS encryption protocols, protecting voice data and signaling from potential threats.

With easy management through web GUI, HTTP/HTTPS, TFTP, Telnet, and syslog, along with flexible installation options (desktop or wall-mount), the Grandstream GXW4104 FXO VoIP Gateway is a dependable solution for businesses modernizing their communication systems while preserving existing PSTN infrastructure.