| Brand | Grandstream |
| Model Name/Number | GXW4502 E1/T1/J1 Digital VoIP Gateway |
| E1/T1/J1 Interface | 1/2/4 RJ45 ports,supporting up to 30/60/120 simultaneous VoIP calls |
| Network Interfaces | Dual self-adaptive Gigabit ports (switched or routed) |
| Peripheral Ports | (2) USB 3.0,(1) SD card interface |
| LCD Display | 128×32 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 |
Key Specifications & Features
From the official documentation for the GXW4500 series (of which the GXW4502 is a member) and product listings:
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The GXW4500 series is designed for digital VoIP gateway use with E1/T1/J1 interfaces. THT Solution Jsc+3grandstream.com+3voipon.co.uk+3
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In particular the GXW4502 model offers:
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2 software-configurable E1/T1/J1 spans (RJ-45 ports) supporting up to approximately 60 simultaneous VoIP calls. voipon.co.uk+2THT Solution Jsc+2
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Dual Gigabit auto-sensing RJ45 network ports (WAN + LAN or switched) with integrated NAT router capability. voipon.co.uk+1
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Support for digital signalling: PRI, SS7, MFC-R2 (depending on configuration) on the E1/T1 side. onedirect.co.uk+1
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Wide codec support: G.711 (A/µ), G.722, G.729A/B, G.723.1, iLBC, etc. Fax over IP support (T.38) included. grandstream.com+1
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Security & provisioning: TLS/SRTP, automated provisioning (HTTP/TFTP/XML), IPv6 support, USB/SD interface on some variants. voipon.co.uk+1
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Physical / environmental specs: Dimensions: 485 mm (L) × 191 mm (W) × 46.2 mm (H); Weight ~2.36 kg for GXW4502. Operating temp ~0-45 °C; humidity 10-90% non-condensing. grandstream.com+1
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