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Gateways

GATEWAY VoIP DIGITAL E1/T1/J1 – GXW 4502

The Grandstream GXW4502 is a high-performance Digital VoIP Gateway designed for businesses looking to modernize their communication infrastructure. It seamlessly integrates digital PSTN and ISDN trunks (E1, T1, or J1) with VoIP networks, enabling a smooth, scalable transition to IP telephony.

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GATEWAY VoIP DIGITAL E1/T1/J1 – GXW 4502

Main features

  • High Capacity: Supports up to 60 concurrent calls, making it ideal for enterprises with high communication demands.
  • Flexible Digital Connectivity: Equipped with 2 configurable E1/T1/J1 ports for seamless integration with the public telephone network.
  • Superior Network Performance: Features dual Gigabit RJ45 ports with auto-sensing and an integrated NAT router for efficient traffic management.
  • Exceptional Voice Quality: Compatible with a wide range of codecs (G.711, G.722, G.729, iLBC, Opus) and includes echo cancellation and dynamic jitter buffering for crystal-clear calls.
  • Advanced Security: Safeguards communications with SRTP and TLS encryption, plus security tools such as Fail2ban and whitelist/blacklist management.
  • User-Friendly Interface: Comes with a 128×32 graphical LCD and multilingual support for simplified status monitoring and voice prompts.

Technical specifications

Type / Purpose

Digital VoIP Gateway for E1/T1/J1 trunks

Trunk Ports

2 configurable E1/T1/J1 ports

Concurrent Calls

Up to 60 simultaneous calls

Network Interfaces

2x RJ45 Gigabit auto-sensing ports (Switch or Routed mode)

Digital Interface / Signaling

PRI, SS7, MFC R2

Peripheral Ports

2x USB 3.0, 1x SD card slot

Display / Controls

128x32 graphical LCD; “OK” & “Down” menu buttons

Indicators

LEDs for LAN, WAN, E1/T1/J1

Voice / Fax Codecs

G.711 A-law/μ-law, G.722, G.723.1, G.726, G.729A/B, iLBC, Opus; Fax-over-IP T.38 (relay up to 14.4 kbps) with G.711 fallback

Voice / Network Enhancements

Echo cancellation (G.168-2004), dynamic jitter buffer, VAD/CNG, PLC; QoS at Layer 2 (802.1Q/802.1p) and Layer 3 (ToS, DiffServ, MPLS)

Protocols / Control

SIP (RFC 3261) over UDP/TCP/TLS; DTMF in-band, RFC2833, SIP INFO; PRI, SS7, MFC R2; Management: HTTP, HTTPS, TFTP, SSH, syslog, backup/restore

Security / Encryption

TLS, SRTP, HTTPS, SSH; whitelist/blacklist; Fail2ban

Power Supply

Universal adapter: 100–240 VAC → 12 VDC / 2A

Dimensions / Weight

485 × 191 × 46.2 mm / Net: ~2.36 kg (Package: ~3.14 kg)

Operating Conditions

0 °C to 45 °C (32 °F – 113 °F); 10%–90% RH (non-condensing)

Storage Conditions

−10 °C to 60 °C (14 °F – 140 °F)

Certifications

FCC, CE, EN, UL, RoHS, TBR4/12/13, K.21, etc.

About the brand

Grandstream Networks is a leading provider of unified communications solutions, including IP telephony, video conferencing, networking, and connectivity devices. With over 20 years of innovation, Grandstream has become a global reference for delivering reliable, high-quality, and cost-effective products that enhance productivity and collaboration for businesses of all sizes.

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