3 com fin cable modem lag question

[Desslok]

A friend and I just got two 3Com shark fin cable modems, and he is having a problem with his. He loves Team Fortress and with his old RCA cable modem there was not problem, but with the 3Com, at random intervals he gets a lockup for 25 seconds exactly then the game continues. I have turned off all other programs running in the back ground. When the @home tech "installed" it he didn't change any of the settings. Has anyone else had an experiance like this?