Key Features & Specifications

• The GXW4501 belongs to the Grandstream “GXW4500 Series: E1/T1/J1 Digital VoIP Gateway”. grandstream.com+2grandstream.com+2

• Span & Capacity: 1 software-configurable E1/T1/J1 port (1-span model) supporting up to ~30 concurrent calls. voipon.co.uk+2opensourceph.com+2

• Support for digital signalling: PRI, SS7, MFC R2. grandstream.com+1

• Network / Interface: Dual Gigabit auto-sensing RJ45 network ports (WAN + LAN) with integrated NAT router. Grandstream Direct+1

• Voice codecs & features:

  • Supports wide range of codecs: G.711 A/µ, G.722, G.729A/B, G.723.1, iLBC, G.726. voipon.co.uk+1

  • Fax support: T.38 Fax-over-IP plus G.711 pass-through. voipon.co.uk+1

  • Voice quality features: Echo cancellation (G.168), adaptive jitter buffer, PLC, VAD/CNG. voipon.co.uk

• Security & provisioning:

  • TLS and SRTP encryption for call and account security. grandstream.com

  • Automated provisioning via HTTP/TFTP with XML config. grandstream.com+1

• Physical / Power / Environmental:

  • Dimensions (unit): 485 mm (L) × 191 mm (W) × 46.2 mm (H); Weight ~2.35 kg. voipon.co.uk

  • Operating temp: 0-45 °C; humidity 10-90% non-condensing. voipon.co.uk

📌 Why It’s Useful

• If you have a legacy digital trunk (E1/T1/J1) and want to integrate with a SIP/IP-PBX or SIP trunk, this gateway makes the bridge.

• Supports modern IP features (Gigabit ports, NAT router, encryption) so it’s suited for enterprise deployment and can integrate into a modern IP network while preserving legacy infrastructure.

• The digital span (E1/T1) means fewer analog conversion issues, better call quality, and more robust trunking compared to analog FXO/FXS gateways.

• The wide codec and signalling support means good compatibility with various telco networks or PBX equipment internationally.