Calling Line Identifier with VMWI
CMX612
CLASS (FSK) Mode
When there is a message waiting in a customer’s voice-mail box, the telephone company’s Central Office
(CO) switch may send on-hook FSK data to the customer’s line. This can be received by the CMX612
and used to indicate waiting voice-mail (Voice-Mail Notification) and other CLASS services, by using the
FSK Receive mode.
Figure 11 : Flow Chart for VMWI-SDT operation of CMX612
ã 2002 Consumer Microcircuits Limited
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