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              8 
                ports of tone detection on the Time Division Multiplexing (TDM) 
                bus that function the same as the TN2182, but the TN744C does 
                not support call progress, tone generation, or clocking Supports 
                digital signal processing of Pulse Code Modulation (PCM) signals 
                on each port to detect tones and other signals Generation 
                of tones is also supported for applications such as Release 2 
                Multi-Frequency Compelled (R2-MFC), Spain MF, and Russia MF Gain 
                (or loss) and conferencing can be applied to PCM signals received 
                from the TDM bus Additional 
                support includes DTMF detectors to collect address digits during 
                dialing 
 
 
 
 
 
 
 
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