Back in '05' Silverlake I believe it was asked about getting an event code 820. I'm getting that same code on the same scenario he wrothe about . On 6.0 T-1 . Not PRI. It mentions about a line driver? Does anyone have any Idea as to what this pertains to? And would it cause drop calls. Not much to the system. T-1 card, Combo expansion card, Station mod, Rad, ATA. Could this be a provider issue. Any how any information would be appreciated. Thank you ahead to my Tech Tips gurus.