At the beginning of September, I wrote:
…my Airport Extreme is becoming less reliable. I am having to reboot it at least once a week now. There is no warning before it goes dodgy.
I said at the time that when I upgraded to FTTC I would probably upgrade the Airport Extreme
I am going to wait before replacing it, as we are getting BT Infinity later this month and I am not sure if I will need a new router. If I do need a specific type of router then I will get a new 802.11n router.
However in the end I found out from BT that I could use my Airport Extreme with FTTC. So before I was upgraded I did update the firmware on my Airport Extreme to firmware 7.4.2
I don’t usually recommend updating your Airport base stations unless there is a security issue, or in my case you are having problems.
Updating the firmware seems to have resolved the issue and I have not had a problem since I updated. However the Airport Express has stopped working properly at least once, though that is much older than the Airport Extreme.