I have a SX200ICP 3.1, with one quad DSP module. On my analog phones I sometimes get complaints about unable to break dial tone from an analog phone. Through testing have determined that it is traffic sensitive and seems to only occur if 2 phones come off hook at exactly the same time and try to dial. have watched each receiver and the same ones never fail twice. It fails on any and all of them when it does. Failure rate is about one failure in 30 trys. Could this be a bad DSP module or do I have something programmed wrong in form 4 or another form that would allocate receivers to something else. It does get worse during peak traffic periods and seems to have appeared after adding a PRI.