Resetting Modem after getting T timeout

 I've heard where you some of you say that you have to go through this process of resetting your modem every time you get disconnected. Is there a reason? I only ask because everything comes back online for me after a minute or so. I feel there is no need to reset the modem(unplug for 10 seconds or more than plug it back in).   

I do remember having to do that with my other modem though so it wouldn't be on one channel. Is that why or is there another reason?