Have a customer that has a bonded PRI for voice and data. Customer will drop calls with high call volumes. Customer was using PAETEC and switched to another carrier due to the drop call issue and rising cost. They are still getting dropped calls with new carrier with high call volumes. Customer originally had 2 circuts 1 data 1 voice no issues. This was a few years ago at least. Have other customers with voice and data circuits with no issues, but these customer have just 1 circuit not a bonded circuit like this customer. Customer has 2 carriers with the second carrier housing the DS1 card. Do you think the dropped calls could be from faulty power supply? Any suggestions would be appreciated!