Problem with Time Capsule acting as a router for home Internet connection. It would lose it's WAN IP address after 5-10 minutes, sometimes longer. Rebooting the Time Capsule would fix it temporarily. Also, renewing the DHCP lease for the Time Capsule using the Airport Utility would bring it back instantly. It's a 500 GB Time Capsule and has 7.4.2 firmware. An update check says that that's the latest. I tried a factory settings reset. At first I thought it helped because it lasted more than 20 minutes afterward. But then did the same thing again. Some background: Time Capsule faithfully did it's duty at another home for extended period of time without any known issues. At old home it was connected to a different cable modem - an RCA I believe. At the new home it's connected to an Arris modem that provides data and voice. For the first three or four hours it worked without issue, then it started losing it's connection (right about the time I was leaving ) The cable company tech had me believing that I had a glitchy Time Capsule. Now I think I have either a: - incompatibility between the Time Capsule and the new Arris Telephony cable modem - network conflict on the cable company's side of things. The Time Capsule was running connected to a different modem at a different address (and account, I believe). - final choice is a glitchy Time Capsule. (note: I first wrote this post on 9/30/10, at that time firmware 7.4.2 was current, now 7.5.2 is latest. I'm attempting to recreate the problem now. This happened at a client's home with their setup - I'm now hooking it up as my main router and using the same Arris Telephony modem) (note 2: It's been running with my Arris Telephony modem on my Internet connection for over twelve hours without issue) Any ideas?