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:

• 4 FXS ports to support simultaneous analog phone or fax connections

• Gigabit Ethernet port ensures fast and reliable network integration

• Four independent SIP profiles with individual SIP registrations

• Wide codec support: G.711, G.726, G.729, G.722, and iLBC for high-quality audio

• T.38 Fax-over-IP support with auto-fallback to G.711 for reliable fax transmissions

• Essential telephony features: call waiting, caller ID, call transfer, call forwarding

• Secure communication with TLS and SRTP encryption

• Auto-provisioning options via HTTP/HTTPS, TR‑069, and TFTP

• Compact desktop design featuring LED indicators for power, network, and line status