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FXSAbbreviation for foreign exchange station. The analog subscriber interfaces (i.e., FXS ports) in Telesis systems can drive loops and is capable of sending Caller ID information according to the ETSI ETS 300 659-1 standard as an FSK signal burst where the data transmission occurs during the first long silent period between two ring patterns. Line feeding voltage is 48 VDC. The subscriber interfaces have overvoltage protection, conforming to ITU-T K.20/K.21 recommendations. |