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FXO Asterisk Card

An FXO (Foreign Exchange Office) Asterisk card is a hardware component used in conjunction with the Asterisk open-source telephony software.
FXO cards are designed to connect analog telephone lines, allowing the Asterisk system to interface with traditional PSTN (Public Switched Telephone Network) lines.
These cards come in various configurations, typically providing multiple ports for connecting analog phone lines to the Asterisk server.