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• The Grandstream GXW4504 E1/T1/J1 Digital VoIP Gateway is a high-capacity digital gateway designed to integrate traditional PSTN and ISDN digital trunks with SIP-based VoIP networks. It is aimed at medium and large enterprises, call centers, service providers, hotels and organizations that need to connect existing E1/T1/J1 infrastructure with IP-PBX, SIP trunking and unified communication systems. Grandstream

  The GXW4504 is the highest-capacity model in the GXW4500 series, providing 4 software-configurable E1/T1/J1 RJ45 ports and supporting up to 120 simultaneous VoIP calls. This makes it suitable for organizations requiring high call capacity while migrating from traditional digital telephony to IP communications. Grandstream

  It supports major digital signaling technologies including PRI, SS7 and MFC R2, allowing integration with different telecom carriers, traditional PBXs and digital telephone networks. The gateway also supports SIP over UDP, TCP and TLS for VoIP connectivity. Grandstream

  For network connectivity, the GXW4504 includes dual self-adaptive Gigabit Ethernet ports, which can operate in switched or routed mode. Additional interfaces include two USB 3.0 ports, an SD card slot and a 128 × 32 graphical LCD display. Grandstream

  Voice-quality technologies include G.168 echo cancellation, dynamic jitter buffering, packet-loss concealment, Voice Activity Detection and Comfort Noise Generation. The gateway also supports T.38 Fax-over-IP and a broad range of voice codecs. Security capabilities include SRTP, TLS, HTTPS, SSH and 802.1X, along with Fail2ban, whitelist/blacklist controls and strong-password access control. Grandstream

  Product status note: Grandstream currently lists the GXW4500 series in its Product Archive. It is worth checking availability before advertising it as a current-stock model. Grandstream

  Key Features

  • 4 × software-configurable E1/T1/J1 RJ45 ports
  • Up to 120 simultaneous VoIP calls
  • PRI digital signaling
  • SS7 signaling support
  • MFC R2 signaling support
  • SIP RFC 3261 over UDP/TCP/TLS
  • Dual Gigabit Ethernet interfaces
  • Integrated NAT routing
  • T.38 Fax-over-IP
  • G.711 A-law/μ-law, G.722, G.723.1, G.726, G.729A/B and iLBC codecs
  • Carrier-grade 128ms line echo cancellation
  • G.168 echo cancellation
  • Dynamic jitter buffer
  • Packet Loss Concealment
  • VAD and Comfort Noise Generation
  • SRTP and TLS encryption
  • HTTPS and SSH management
  • 802.1X authentication
  • Fail2ban, whitelist and blacklist security
  • 2 × USB 3.0 ports
  • SD card interface
  • 128 × 32 graphical LCD
  • Rack-mount and desktop installation

GXW4504 pricing and buyer FAQs

Contact Optima Technologies for pricing, availability, warranty and integration requirements in India. Compare our Grandstream digital gateways.

What interface does this model provide?

The GXW4504 offers 4 E1/T1/J1 digital interfaces. Confirm the exact hardware revision and supplied configuration before purchase.

What should I check before ordering?

Confirm PBX compatibility, signaling, firmware, capacity, included accessories, warranty, delivery lead time and support charges.