thanks ironhorse17
my digit grabber just shows digits, that's all.
and yes, the dial tone is provided by the cable company, I assume it is voip, it's converted back to analog at the customers site.
I have a problem with an 0x32 / CP100. all lines are answered by AA, intermittently the dtmf input receives a "you have entered an invalid ext".
I have put a digit grabber on the lines and I can see the correct digits coming in, although sometimes the digits are duplicated (a 233 entry may come...
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