The Grandstream GXW4248 is a 48-port FXS high-density analog VoIP gateway featuring 2x 50-pin Telco connectors, 1x Gigabit Ethernet port, and a 128x32 backlit LCD display. It supports 4 SIP server profiles, independent SIP accounts per port, and advanced voice codecs like G.722 and Opus. Designed for superior voice quality with 128ms tail-length echo cancellation, it is ideal for connecting legacy analog phones/PBXs to an IP-based system.
Key Specifications & Features:
Ports: 48x FXS RJ11 ports (via 2x 50-pin Telco connectors).
Networking: 1x 10/100/1000 Mbps auto-sensing Gigabit Ethernet port.
Voice Codecs: G.711, G.723, G.726, G.729 A/B, iLBC, G.722, and Opus.
Fax Over IP: T.38 compliant Group 3 Fax Relay up to 14.4kpbs.
SIP Profiles: 4 SIP server profiles per system and independent SIP accounts per port.
Voice Quality: Carrier-grade 128ms tail length line echo cancellation.
Security: SRTP, TLS, HTTPS, and AES encryption.
Management: Automated provisioning via TR-069, HTTP, HTTPS, or TFTP.
Display: 128x32 graphic backlit LCD.
Mounting: Desktop and 1U rack-mountable (with brackets).
Dimensions/Weight: 19 x 4 x 13 in (Approx. 4.92 KG).
The v2 model enhances this with broader codec support, including Opus, and improved hardware performance.