Signal When Playing COD Black Ops Goes Red

At random times AT NIGHT, while Call of Duty, Black Ops, the signal on the game goes red. I have spent more nights on the phone with ATT without resolution and refuse to call again. An ATT tech has come to our house twice, once to check the outside line and to look inside too. Signal to house is always fine.We bought the 2Wire 2701HG-B since ATT said that our problem was we were running a modem and seperate router. We even sent the PS3 out for service thinking it was the problem. Yet here we are again with a red signal in the game.On the modem, the ethernet and wireless flash VERY rapidly, its more like a strobe than a flash. The internet and dsl lights are solid. We are considering going to cable from DSL.