Grandstream GXW4108 – 8 Port FXO VoIP Gateway with SIP & Dual Ethernet
The Grandstream GXW4108 FXO VoIP Gateway connects up to 8 analog PSTN lines to IP-based telephony systems. Featuring SIP support, dual Ethernet ports, T.38 fax, PSTN failover, and advanced call features, it is ideal for businesses integrating legacy telephony with modern VoIP networks.
Description
The Grandstream GXW4108 FXO VoIP Gateway is a powerful and reliable solution designed to connect traditional analog PSTN lines with modern SIP-based VoIP systems. With 8 FXO ports, this gateway allows businesses to seamlessly integrate legacy telephony infrastructure into their IP communication networks, reducing costs while maintaining compatibility.
The Grandstream GXW4108 FXO VoIP Gateway is ideal for small to medium enterprises looking to transition to VoIP without replacing their existing analog lines. It supports the SIP protocol (RFC 3261), making it fully compatible with leading IP PBXs, softswitches, and SIP servers.
Equipped with dual 10/100 Mbps Ethernet ports, the device provides flexible network deployment options, allowing it to function in both switched and routed environments. The gateway supports a wide range of voice codecs including G.711, G.723, G.726, G.729, G.728, and iLBC, ensuring high-quality voice communication across various network conditions.
For businesses that rely on fax communication, the GXW4108 includes T.38 Fax-over-IP support, enabling reliable fax transmission over IP networks. Additionally, it offers PSTN failover capability, ensuring uninterrupted communication by automatically routing calls through analog lines in case of network or power failure.
The device also includes advanced telephony features such as call forwarding, call transfer, caller ID, 3-way conferencing, and flexible dial plans, enhancing communication efficiency. Built-in G.168 echo cancellation, dynamic jitter buffer, and QoS support ensure stable and clear voice performance.
Security is a key component of the Grandstream GXW4108 FXO VoIP Gateway, with support for SRTP, TLS, and SIPS encryption protocols, protecting both signaling and media traffic.
With easy configuration via web GUI, HTTPS, TFTP, and syslog, along with flexible installation options (desktop or wall-mount), the Grandstream GXW4108 FXO VoIP Gateway is a dependable and scalable solution for businesses modernizing their communication systems.
FXO Interfaces:
Ports: 8 × FXO (RJ11) for PSTN lines
Supports connection of up to 8 analog lines
Network & Connectivity:
Ethernet Ports: 2 × 10/100 Mbps RJ45
LAN/WAN support (switched or routed modes)
VLAN & QoS support (DiffServ, ToS)
Voice & Codec Support:
G.711 (μ-law / A-law)
G.723
G.726
G.729 A/B/E
G.728
iLBC
Fax & DTMF:
T.38 Fax-over-IP (Group 3)
G.711 fallback for fax
DTMF: In-audio, RFC2833, SIP INFO
Telephony Features:
Caller ID
Call forwarding
Call transfer
3-way conferencing
Flexible dial plans
Reliability & Performance:
PSTN failover (lifeline support)
G.168 echo cancellation
Dynamic jitter buffer
Security Features:
SRTP encryption
TLS / SIPS support
Secure SIP communication
Management & Provisioning:
Web GUI (HTTP/HTTPS)
TFTP / HTTP provisioning
Syslog monitoring
Telnet access
Hardware & Power:
Power Supply: 12V DC adapter
Input: 100–240V AC
LED Indicators: Power, network, FXO status
Physical & Environment:
Desktop or wall-mount installation
Dimensions: Approx. 230 × 135 × 35 mm
Operating Temperature: 0°C to 40°C
Humidity: 10% to 90% (non-condensing)
Key Features:
8 FXO Ports – Connect multiple PSTN lines
SIP Integration – Compatible with IP PBX systems
Dual Ethernet Ports – Flexible network setup
T.38 Fax Support – Reliable fax over IP
PSTN Failover – Continuous communication
Advanced Telephony Features – Professional call handling
Enterprise Security – SRTP, TLS, SIPS encryption
Easy Deployment – Web-based management & provisioning
Technical Datasheet
You can download the full technical documentation for this product from the link below:
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