September 4, 2026
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If you’re setting up or expanding a VoIP phone system, you’re likely to encounter the terms FXS and FXO. They refer to two types of analog telephony interface ports, and understanding the difference between them is more than a technical detail. The relationship between FXS and FXO ports determines how your phones connect to your… Continue reading FXS vs. FXO ports: What they are and why the difference matters for VoIP
