Grandstream GXW4501 E1/T1/J1 PRI VoIP Gateway

Key Features:

• Software‑Configurable E1/T1/J1 Ports: One, two, or four spans available (depending on variant) supporting digital PRI, SS7, and MFC R2 signaling.

• PRI/ISDN Integration: Enables traditional PRI/ISDN trunk connectivity to SIP infrastructure — ideal for PBX migration or hybrid systems.

• Concurrent Call Capacity: Up to 30/60/120 simultaneous VoIP calls depending on number of spans configured.

• Dual 10/100/1000 Mbps Ethernet: Auto‑sensing network interfaces with integrated NAT router for LAN/WAN flexibility.

• Advanced Codec Support: Supports a wide range of voice codecs (e.g., G.711, G.722, G.729, G.723, iLBC, Opus, GSM‑FR, AAL2‑G.726‑32).

• T.38 Fax‑over‑IP: Enables reliable Group 3 fax relay over IP with fallback to G.711 when needed.

• Enhanced Voice Quality: Carrier‑grade line echo cancellation, dynamic jitter buffer, silence suppression (VAD/CNG), and packet loss concealment.

• Robust Security: Media encryption (SRTP), secure signaling (TLS/HTTPS/SSH), 802.1x, and advanced access control.

• Automated Provisioning & Management: HTTP/HTTPS, TFTP, TR‑069, syslog, and XML config file support for scalable deployment.

• Multi‑Language Voice Prompts: Built‑in, customizable IVR voice prompts for enhanced usability.

• Peripheral Interfaces: USB 3.0 ports and SD card interface for storage and expandability.

• Status Display & Indicators: Integrated LCD display and LED indicators for LAN, WAN, PRI/E1/T1/J1 status.

Hardware & Technical Specs:

• Digital Trunk Interface: Configurable E1/T1/J1 spans supporting PRI, SS7, MFC R2.

• Network Interfaces: 2 × Gigabit RJ45 (auto‑sensing, switched or routed).

• Voice Capacity:

  • 1 span: ~30 simultaneous calls

  • 2 spans: ~60 simultaneous calls

  • 4 spans: ~120 simultaneous calls.

• Peripheral: 2 × USB 3.0 ports, 1 × SD card interface.

• Display: 128×32 graphic LCD with navigation buttons.

• Power: Universal AC input (100–240 VAC) with DC 12 V output.

• Protocols: SIP (RFC3261), PRI/ISDN, SS7, MFC R2, common network/IP protocols.

• Security: SRTP, TLS, HTTPS, SSH, 802.1x.

• QoS: 802.1Q/p VLAN, ToS, DiffServ, MPLS traffic prioritization.

• Management: Web GUI, TR‑069, syslog, provisioning services.

• Form Factor: Rack‑mount & desktop capable with metal enclosure.