CMX602B Consumer Microcircuits Limited, CMX602B Datasheet - Page 15

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

Calling Line Identifier
Other On-hook Systems
ETS 300 659-1 also allows for systems where the FSK transmission is preceded by a Dual Tone Alerting
signal similar to that used by BT but without a line reversal (section 6.1.2a) or by a Ringing Pulse Alerting
Signal (section 6.1.2b).
The U.K. CCA (Cable Communications Association) specification TW/P&E/312 precedes the FSK signals
by a 200 to 450ms ring burst. AC and DC line terminations during FSK reception are optional.
Mercury Communications Ltd. specification MNR 19 allows for either the BT system or that specified by
CCA.
As these are all slight variants on the BT and Bellcore systems, they can also be handled by the
CMX602B.
 2003 CML Microsystems Plc
Figure 8b : Bellcore On-hook System Signals
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CMX602B
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