Grandstream GXW4504 4‑Port FXS VoIP Gateway
The Grandstream GXW4504 is a compact yet versatile analog-to-VoIP gateway featuring four FXS ports for connecting multiple legacy phones or fax machines to a SIP-based VoIP network. Designed for small offices, remote sites, or home environments, it combines essential telephony capabilities with secure provisioning and robust audio quality in a space-efficient format.
Key Features:
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4 FXS ports to support simultaneous analog phone or fax connections
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Gigabit Ethernet port ensures fast and reliable network integration
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Four independent SIP profiles with individual SIP registrations
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Wide codec support: G.711, G.726, G.729, G.722, and iLBC for high-quality audio
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T.38 Fax-over-IP support with auto-fallback to G.711 for reliable fax transmissions
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Essential telephony features: call waiting, caller ID, call transfer, call forwarding
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Secure communication with TLS and SRTP encryption
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Auto-provisioning options via HTTP/HTTPS, TR‑069, and TFTP
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Compact desktop design featuring LED indicators for power, network, and line status




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