Foreign exchange office
- Foreign exchange office
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Un port FXO, ou Foreign eXchange Office, est un port qui reçoit une ligne téléphonique. Un modem RTC, un téléphone ou un fax sont équipés d'un port FXO, ils s'attendent à recevoir une alimentation, une porteuse lors du décrochement, ainsi qu'une élévation de la tension en cas de sonnerie.
Le terme FXO est souvent utilisé en opposition au FXS qui lui fournit l'alimentation, la porteuse et la sonnerie.
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