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1Px0Dah0804Telesis hybrid analog subscriber (FXS) and DC loop trunk (FXO) line card for PX24M and PX24X systems. It is equipped with 8 FXS interfaces and 4 FXO interfaces.  The subscriber interfaces can drive loops up to 3,000 ohm resistance (including the terminal equipment) and is capable of on-hook transmission such as sending Caller ID information. The analog subscriber line card is for 600 ohm resistive reference impedance. DC loop trunk interfaces that can detect line DC feed, polarity reversal are capable of on-hook reception of tones such as receiving Caller ID information transmitted. The analog DC loop trunk card is for 600 ohm resistive reference impedance. Supports ETSI FSK and Bellcore FSK standards "Caller ID", that is, detecting the calling subscriber number |