CMX602BE4 查看數據表（PDF） - CML Microsystems Plc

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CMX602BE4

Calling Line Identifier plus Call Waiting (Type II)

CML Microsystems Plc 

Calling Line Identifier

CMX602B

applications, the longer (88 to 110ms) Tone Alert signal employed by BT for on-hook applications will not

necessarily cause IRQN to go low.

See section 1.7.1 for definitions of Tton, Ttoff and TqCAS

Figure 6 : Tone Alert Detector operation

1.5.8 Ring or Line Polarity Reversal Detector

These circuits are used to detect the Line Polarity Reversal and Ringing signals associated with the Calling

Line Identification protocol.

Figure 7 illustrates their use in a typical application.

Figure 7 : Ring or Line Polarity Reversal operation

 2003 CML Microsystems Plc

11

D/602B/2

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