CMX602B Consumer Microcircuits Limited, CMX602B Datasheet - Page 11

• Manufacturer Part Number: CMX602B
• Description: Calling Line Identifier Plus Call Waiting Type ii
• Manufacturer: Consumer Microcircuits Limited

Calling Line Identifier
applications, the longer (88 to 110ms) Tone Alert signal employed by BT for on-hook applications will not
necessarily cause IRQN to go low.
1.5.8
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.
 2003 CML Microsystems Plc
Ring or Line Polarity Reversal Detector
Figure 7 : Ring or Line Polarity Reversal operation
See section 1.7.1 for definitions of Tton, Ttoff and TqCAS
Figure 6 : Tone Alert Detector operation
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CMX602B
D/602B/2