We have a 4.4 2740 card with PRI. Global Crossing is our T1 provider. That can't seem to get the echoing out of our line. Had Qwest adjust the line from +1db to -7.5db no help. If we upgrade to 5.2 and adjust the trunks down each to -7.5db the problem goes away. I found out a similiar company has the same setup but uses ELI and no issues. Is this possible?