The Grandstream GXW4501 is a single-port, software-configurable E1/T1/J1 digital VoIP gateway that bridges traditional PSTN/ISDN trunks with SIP-based VoIP networks.
It supports up to 30 concurrent calls, letting businesses modernize their voice infrastructure without replacing existing digital trunk lines.
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| Digital Trunk Ports | 1 x software-configurable E1/T1/J1 |
| Signaling Protocols | PRI, SS7, MFC R2 |
| Max Concurrent Calls | 30 |
| Network Ports | 2 x Gigabit RJ45 with integrated NAT router |
| Voice Codecs | Opus, G.711, G.722, G.723.1, G.726, G.729A/B, iLBC |
| Security | TLS, SRTP |
| Provisioning | HTTP/TFTP with XML configuration files |
| No Infrastructure Overhaul: Keep existing PSTN/ISDN trunk lines while moving voice traffic to SIP |
| Budget-Friendly Entry Point: A cost-effective way to start a VoIP migration |
| Wide PBX Compatibility: Works with Grandstream UCM, Asterisk-based systems, Sangoma, Yeastar and more |
| Built to Scale: Clear upgrade path to the 2-port (GXW4502) or 4-port (GXW4504) models |
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