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Programming 73M2901CE call progress monitor filter

Posted: 03 Aug 2011 ?? ?Print Version ?Bookmark and Share

Keywords:modem? frequency band? call progress detector?

The Teridian 73M2901CE integrated circuit modem provides all the microprocessor control, modulation, and demodulation functions required to implement a V.22 bis 2400 bit/s modem. There are some ways to make the 73M2901CE do functions that they were not originally intended to do, for instance detecting and generating tones that are not normally used for normal modem functions.

Although all the 73M2901CE modem is preprogrammed for most normal dial-up low speed modem applications, in some cases it may be desirable to detect frequencies that are not part of its default set. The 73M2901CE modem can be programmed to detect and generate other frequencies beside the ones normally used. This application note describes the procedure for modifying the detect frequency band of the imprecise call progress detector of the 73M2901CE.

View the PDF document for more information.

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