What Is an FXO VoIP Gateway?

An FXO VoIP Gateway is a device designed to connect analog telephone lines from a telecom provider to an IP-based PBX or VoIP network. In simple terms, it allows traditional PSTN lines to communicate with a VoIP system.

The FXO port behaves like a telephone from the perspective of the telecom operator. It receives dial tone, incoming calls, and signaling from the PSTN, converts them into IP packets, and routes them through an IP PBX, softswitch, or SIP server.