Grandstream GXW4501 E1/T1/J1 PRI VoIP Gateway

The Grandstream GXW4501 PRI VoIP Gateway is a powerful and scalable solution designed to bridge digital PSTN/ISDN trunk lines with modern SIP-based VoIP networks. Built for enterprises and service providers, it supports E1, T1, and J1 interfaces with software-configurable spans, enabling seamless integration with existing telephony infrastructure.

The Grandstream GXW4501 PRI VoIP Gateway supports multiple signaling protocols including PRI, SS7, and MFC R2, ensuring compatibility with a wide range of carrier networks worldwide. This makes it an ideal choice for businesses migrating from traditional PBX systems to IP-based communication platforms.

With support for up to 120 simultaneous VoIP calls (depending on the number of configured spans), the gateway delivers high-capacity performance suitable for medium to large-scale deployments. It features dual Gigabit Ethernet ports, providing flexible network configurations with support for routed or switched environments.

The device supports a wide array of voice codecs including G.711, G.722, G.729, G.723, iLBC, Opus, and GSM, ensuring excellent voice quality across diverse network conditions. It also includes T.38 Fax-over-IP support, enabling reliable fax transmission over IP networks with fallback to G.711.

Advanced voice processing technologies such as line echo cancellation, dynamic jitter buffer, packet loss concealment, and VAD/CNG ensure clear and stable communication. The Grandstream GXW4501 PRI VoIP Gateway also offers strong security features including SRTP media encryption, TLS/HTTPS/SSH secure access, and 802.1x authentication, protecting both voice data and network access.

For simplified deployment and management, the gateway supports automated provisioning via HTTP, HTTPS, TFTP, and TR-069, along with centralized monitoring using syslog. It also includes USB 3.0 ports, an SD card interface, and a built-in LCD display, enhancing usability and system control.

With its robust performance, advanced features, and flexible deployment options, the Grandstream GXW4501 PRI VoIP Gateway is an ideal solution for businesses seeking to modernize their communication systems while leveraging existing digital trunk infrastructure.