Grandstream GXW4504 Digital VoIP Gateway

The GXW4504 is a E1/T1 Digital VoIP Gateways that allows digital PSTN and ISDN trunks to be integrated with VoIP networks. By connecting the GXW4504 with a VoIP network and a traditional PBX or E1/T1/J1 provider, businesses can drastically increase the amount of PSTN/ISDN trunks integrated with their VoIP network. The GXW4504 provides 4 T1/E1/J1 spans and supports 120 concurrent calls to cater to the VoIP needs of  large sized enterprises.

Features:

• Software configurable E1/T1/ J1 port, support PRI, SS7, MFC R2
• Dual Gigabit auto- sensing RJ45 network ports with integrated NAT router
• Supports a wide- range of voice codecs, including Opus, G.722, G.729, iLBC, and more
• TLS and SRTP security encryption technology to protect calls and accounts
• Automated provisioning by HTTP/TFTP with XML config files
• Supports T.38 Fax for creating Fax-over-IP
• Supports multi- language voice prompts

The GXW4500 series supports PRI, SS7 and MFC R2 digital signaling protocols and nearly all major voice codecs including Opus, G.722, G.711, G.729, G.723, iLBC, G.726, GSM-FR, etc. This digital VoIP gateway series includes dual Gigabit network ports with a configurable integrated NAT router, two USB 3.0 ports, and one SD card interface. By adding echo cancellation, jitter buffer, T.38 fax support, TLS and SRTP security encryption as well as automated provisioning by HTTP/TFTP with XML config files, the GXW4500 series is able to cater to the VoIP needs of large and medium enterprises.

Gateway Comparison

Model	GXW4501	GXW4502	GXW4504
E1/T1/J1 Interface	1 port, supporting up to 30 simultaneous VoIP calls	2 ports, supporting up to 60 simultaneous VoIP calls	4 ports, supporting up to 120 simultaneous VoIP calls
Network Interfaces	Dual self-adaptive Gigabit ports (switched or routed)
Peripheral Ports	(2) USB 3.0, (1) SD card interface
LED Indicators	LAN, WAN, E1/T1/J1
LCD Display	128x32 dot matrix graphic LCD with DOWN and OK buttons
Voice-over-Packet Capabilities	LEC with NLP Packetized Voice Protocol Unit, 128ms-tail-length carrier grade Line Echo Cancellation, Dynamic Jitter Buffer, Modem detection & auto-switch to G.711
Voice and Fax Codecs	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
Fax over IP	T.38 compliant Group 3 Fax Relay up to 14.4kpbs and auto-switch to G.711 for Fax Passthrough, Fax data pump V.17, V.21, V.27ter, V.29 for T.38 fax relay
Voice-quality Enhancement	Echo cancellation (G.168-2004), Jitter buffer, Silence suppression (VAD, CNG), PLC
QoS	Layer 2 QoS (802.1Q, 802.1p) and Layer 3 (ToS, DiffServ, MPLS) QoS
Voice Codecs	G.729A/B, G.711u/a-law, G.726, G.722, G.723, iLBC, DTMF
Universal Power Supply	Input: 100 ~ 240VAC, 50/60Hz; Output: DC+12V, 2A
Weight	Unit Weight: 2,350g; Package Weight: 3130g	Unit Weight: 2,360g; Package Weight: 3140g	Unit Weight: 2,380g; Package Weight: 3160g
Dimensions	485mm(L) x 191mm(W) x 46.2mm(H)
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