Product Overview

The Grandstream GXW4248 is a high-density 48-port FXS VoIP gateway designed to connect analog telephones, fax machines, and legacy PBX systems to modern SIP-based IP networks. It provides organizations with a cost-effective way to transition from traditional telephony infrastructure to VoIP communications while preserving existing analog equipment.

Part of the GXW4200 gateway series, this enterprise-grade device offers carrier-grade voice quality, robust security protection, and automated provisioning, making it ideal for large deployments such as hotels, enterprises, service providers, and call centers.

With 48 FXS ports and dual 50-pin Telco connectors, the GXW4248 enables high-density connectivity and simplified installation in rack-mounted telecommunication environments.

Key Features

📞 High-Density Analog Connectivity

• 48 FXS analog ports (RJ11)

• 2 × 50-pin Telco connectors for large-scale deployments

• LED indicators for individual port status.

🌐 SIP & VoIP Compatibility

• Fully compliant with SIP standard (RFC 3261)

• Independent SIP account per port

• Supports multiple SIP server profiles for flexible configuration.

🔊 Carrier-Grade Voice Quality

• Wideband voice codecs including Opus and G.722

• Advanced 128 ms echo cancellation and dynamic jitter buffer for clear calls.

📡 High-Speed Network Connectivity

• 1 × Gigabit Ethernet port (10/100/1000 Mbps)

• Supports QoS, VLAN tagging, and DiffServ for voice prioritization.

⚙️ Automated Provisioning

• Provisioning via TR-069, HTTP, HTTPS, and TFTP

• AES-encrypted configuration files for secure deployment.

🔐 Enterprise-Grade Security

• SRTP and TLS encryption for secure voice communication

• Secure boot, unique device certificates, and dual firmware images.

🖥️ Easy Management

• 132 × 48 backlit graphic LCD display

• Web interface, CLI, and remote management tools for configuration.

Technical Specifications

The gateway also supports caller ID, call waiting, call transfer, call forwarding, call park/pickup, and 3-way conferencing, ensuring full PBX functionality for analog devices.

Package Contents

Typical package includes:

• GXW4248 VoIP Gateway

• Power adapter

• Ethernet cable

• Telco cables

• Rack-mount brackets

• Quick installation guide.

Ideal Use Cases

The Grandstream GXW4248 is suitable for:

• Hotels and hospitality phone systems

• Enterprises migrating from analog PBX to VoIP

• Call centers and service providers

• Universities and campuses

• Government organizations

It allows organizations to maintain existing analog infrastructure while upgrading to modern IP communication systems.

Useful Links

Official Product Page
https://www.grandstream.com/products/gateways-and-atas/fxs-gateways/product/gxw4200-series

Datasheet (GXW4200 Series)
https://www.grandstream.com/hubfs/Product_Documentation/GXW4200/Datasheet_GXW4200.pdf

Grandstream Device Management System (GDMS)
https://www.gdms.cloud

Grandstream Firmware & Support
https://www.grandstream.com/support