Grandstream GXW4108 8‑Port FXO VoIP Gateway

Key Features:

• 8 × FXO Ports (RJ11): Connect up to eight analog PSTN lines to your IP telephony system.

• Dual 10/100 Mbps Ethernet Ports: Switched or routed LAN/WAN connectivity for network flexibility.

• Comprehensive Codec Support: G.711 (μ/a‑law), G.723, G.726, G.729A/B/E, G.728, iLBC for quality voice communication.

• T.38 Fax‑over‑IP Support: Group 3 fax relay with auto‑switch to G.711 for fax pass‑through.

• SIP Protocol (RFC 3261): Works with leading IP‑PBXs, soft‑switches, and SIP hosts.

• PSTN Failover: Lifeline failover to PSTN lines in case of VoIP service or power interruption.

• Advanced Telephony Features: Caller ID, call transfer, call forwarding, 3‑way conferencing, flexible dial plans, and more.

• Quality & Stability: G.168 echo cancellation, dynamic jitter buffer, and optional VLAN/QoS support.

• Secure Communications: Supports SRTP, TLS/SIPS for encrypted media and signaling.

• Provisioning & Management: Web GUI, HTTPS, TFTP/HTTP, syslog, Telnet for setup and monitoring.

• Flexible Deployment: Wall‑mount or desktop placement.

Hardware & Technical Specs:

• FXO Ports: 8 × RJ11 analog FXO interfaces for PSTN.

• Network: 2 × 10/100 Mbps RJ45 (LAN/WAN).

• Voice Codecs: G.711, G.723, G.726, G.729A/B/E, G.728, iLBC.

• Fax Support: T.38 compliant Group 3 Fax relay + G.711.

• DTMF Methods: In‑audio, RFC2833, SIP INFO.

• SIP Profiles: Up to 2 SIP server profiles per system (independent accounts per port).

• LED Indicators: Power, Network, FXO line status.

• Power: External 12 VDC adapter (100–240 VAC input).

• Management Interfaces: Web GUI (HTTPS), TFTP/HTTP provisioning, syslog, Telnet.

• QoS & Security: DiffServ, ToS, VLAN tagging; SRTP/TLS/SIPS.

• Physical: ~230 × 135 × 35 mm; wall/desktop mounting.

• Operating: 0 °C–40 °C; non‑condensing 10 %–90 % humidit