Grandstream GXW4104

The Grandstream GXW4104 provides a practical solution for integrating existing analog telephone lines with IP-based communications systems. Its four FXO ports connect to PSTN lines, allowing compatible IP PBX systems to route calls through traditional telephone services. Two 10/100 Mbps Ethernet ports support network connectivity and flexible deployment. The gateway supports SIP signalling, multiple voice codecs, caller ID formats and configurable dial plans for different telephony environments. Echo cancellation and dynamic jitter buffering help maintain voice quality, while T.38 fax support enables compatible fax machines and services to operate over IP networks. PSTN failover functionality helps preserve telephone-line access during power failure.