Time Capsule interfering with cordless phone?

I installed my Time Capsule a couple of weeks ago. I've had a number of problems with it, but overall, it is gradually working more efficiently.

However, over the last few weeks, people who have called me have complained about having trouble hearing me on my home phone, which is a cordless 2.4GHz device. At first, I assumed the problem was on their end, since most of the callers were on cell phones. Also, I don't get many calls on my land line, since most people call on my cell now. But over time, the complaints have been consistent, and more diagnostically, several of the callers were calling on land lines themselves.

At first, I thought the problem was with the cordless handset, but I have three handsets, and they all have the same problem.

I finally realized: The problem started at the same time I bought the Time Capsule!

Has anyone else encountered this problem, and is there a way to fix it? I'm going to try moving the cordless base station, which right now is sitting next to the Time Capsule. (Though I thought the Time Capsule was on a different frequency than the 2.4GHz phone and would not interfere.)

Thanks in advance for your help.

David