TC suddenly slowing Internet performance

Question

I moved from Linksys to the TC after several bad experiences with Linksys, and now am having the same bad experience with the TC! It's been running for a few months with no problems, and then suddenly this week I started experiencing massive performance degradation of Internet speed. I've read through several older archived threads and this appears to be a pretty regular deal that Apple has not been able to resolve for years. And I DON'T believe that it's related to the wireless portion of the router.
I have a work router hard wired behind the TC, to which I have connected my work MAC, and an IP phone. I usually notice the slow down when my IP phone begins experiencing poor performance. This stuff is all hard wired. A power cycle of the TC fixes the issue every time, but it's gotten to the point where I'm having to power cycle the darn thing every day. It's ridiculous. This HAS to get fixed. This thing costs several times more than the Linksys, so I expect better than this.

Answer 1

i actually just bought a 1TB TC. I have it running as a wireless Backup drive, connected to my already existing WLAN, and when I started the 1st run of Time Machine, my entire network stopped. No network traffic at all, and the TC stopped backing up after 2GB
... i hope I didn't just blow $330 for nothing