Really nice!
Now you have the possibility to put out real dial data;
the pps rate,
The average, max and min break percentage.
How close the DTMF tones are to ideal. (I have no idea about whats OK or not for DTMF) Some dtmf pads may come out of tuning.
How high the REN load are? (Impedance at 20, 25, and 50-60 HZ.)
dsk