Grandstream GXW4504 4-Port E1/T1/J1 Digital VoIP Gateway — Dual Gigabit, 120 Simultaneous Calls, SS7, PRI, MFC R2 - Image 2

Grandstream GXW4504 4-Port E1/T1/J1 Digital VoIP Gateway — Dual Gigabit, 120 Simultaneous Calls, SS7, PRI, MFC R2

The Grandstream GXW4504 is a high-capacity 4-port E1/T1/J1 Digital VoIP Gateway supporting up to 120 concurrent calls. Ideal for medium to large enterprises, it integrates legacy digital PSTN and ISDN trunks with modern VoIP networks, offering advanced signaling, robust security, and carrier-grade voice quality.

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Description

The Grandstream GXW4504 is part of the GXW4500 series — enterprise-grade digital VoIP gateways that bridge digital E1/T1/J1 PSTN and ISDN connections with SIP-based VoIP systems. Grandstream GXW4504 is featuring 4 RJ45 E1/T1/J1 ports and supporting up to 120 concurrent calls, it’s designed for high-density deployments in businesses, service providers, and call centers.

The device supports major signaling protocols like PRI, SS7, MFC R2, and is software-configurable per port for deployment flexibility. It includes dual Gigabit Ethernet ports with integrated NAT, advanced security protocols (TLS, SRTP, HTTPS), and automated provisioning via HTTP/TFTP/XML.

Grandstream GXW4504 comes with a comprehensive suite of voice codecs including Opus, G.722, G.729A/B, iLBC, and T.38 Fax-over-IP, it delivers exceptional call quality. The Grandstream GXW4504 also supports advanced voice features such as echo cancellation, jitter buffer management, QoS tagging, and dynamic packet management.

It’s easy to manage with a web GUI, HTTPS, SSH, syslog, and SNMP support, while offering multi-language web and IVR support, rack-mountable form factor, and built-in LCD status display.

🎯 Key Features:

4 E1/T1/J1 ports via RJ45, software-configurable, supporting:
- PRI
- SS7
- MFC R2
Up to 120 concurrent SIP calls
Dual Gigabit auto-sensing Ethernet ports with integrated NAT
Peripheral ports: 2x USB 3.0, 1x SD card slot
128×32 dot-matrix LCD display with navigation buttons
Multi-language web UI and IVR support
Advanced codec support: Opus, G.722, G.729A/B, iLBC, G.711, G.723.1, G.726
Fax-over-IP: T.38 compliant with auto-switch to G.711
Dynamic jitter buffer, echo cancellation (128ms tail-length)
QoS: Layer 2 (802.1Q, 802.1p) & Layer 3 (ToS, DiffServ, MPLS)
DTMF methods: In-audio, RFC2833, SIP INFO
SIP signaling over UDP, TCP, TLS
Security: SRTP, TLS, HTTPS, SSH, 802.1X
Fail2ban, event alerts, whitelist/blacklist, strong password policies
Firmware upgrade via TFTP/HTTP/HTTPS, local HTTP upload
Call status, ISDN status, and device monitoring
Rack-mountable and desktop installation options

About Grandstream

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Product Details

Feature	Specification
	4 x RJ45 ports (E1/T1/J1), supporting up to 120 simultaneous VoIP calls
	Dual self-adaptive Gigabit ports (switched or routed)
	2 x USB 3.0, 1 x SD card interface
	LAN, WAN, E1/T1/J1
	128x32 dot matrix graphic LCD with DOWN and OK buttons
	Yes (long press for factory reset, short press for reboot)
	Carrier-grade line echo cancellation (128ms-tail, LEC with NLP), dynamic jitter buffer, modem detection & auto-switch to G.711
	G.711 A-law/U-law, G.722, G.723.1 (5.3K/6.3K), G.726, G.729A/B, iLBC, AAL2-G.726-32
	T.38 compliant Group 3 Fax Relay up to 14.4kbps, auto-switch to G.711 for Fax Pass-through, V.17, V.21, V.27ter, V.29
	Echo cancellation (G.168-2004), jitter buffer, silence suppression (VAD, CNG), PLC
	Layer 2 (802.1Q, 802.1p), Layer 3 (ToS, DiffServ, MPLS)
	In-band audio, RFC2833, SIP INFO
	SIP (RFC 3261) over UDP/TCP/TLS, PRI, SS7, MFC R2, RBS (pending)
	Euro ISDN, nation, Q.SIG
	MFC R2 (Argentina, Brazil, China, Czech Republic, Colombia, Ecuador, Indonesia, ITU, Mexico, Philippines, Venezuela)
	ITU, ANSI, China
	Firmware upgrade via TFTP / HTTP / HTTPS or local HTTP upload
	Syslog, HTTPS, Web browser, voice prompt, backup & restore, port capture, packet capture
	TCP/UDP/IP, RTP/RTCP, ICMP, ARP, DNS, DDNS, DHCP, NTP, TFTP, SSH, HTTP/HTTPS, PPPoE, STUN, SRTP, TLS, LDAP, PPP, Frame Relay (pending), IPv6, OpenVPN®
	Call status/history, device status monitoring, ISDN status monitoring
	SRTP, TLS, HTTPS, SSH, 802.1X; user-defined SIP/RTP/HTTP/HTTPS ports; Fail2ban, alerts, whitelist/blacklist, strong password access control
	Input: 100–240VAC, 50/60Hz; Output: DC+12V, 2A
	485mm (L) x 191mm (W) x 46.2mm (H)
	2,380g / 3,160g
	0°C to 45°C (32°F to 113°F), Humidity: 10–90% (non-condensing)
	-10°C to 60°C (14°F to 140°F), Humidity: 10–90% (non-condensing)
	Rack mount & desktop
	Web UI: English, Simplified/Traditional Chinese, Spanish, French, Portuguese, German, Russian, Italian, Polish, Czech Customizable IVR: English, Chinese, British English, German, Spanish, Greek, French, Italian, Dutch, Polish, Portuguese, Russian, Swedish, Turkish, Hebrew, Arabic
	FCC, CE, RCM, ITU K.21, UL 60950-1, TBR 4/12/13, AS/ACIF S016/S038, RoHS