PHY Mode: 802.11n
Channel: 149,1
That means you are using 802.11n protocol and you are in the 5GHz band. The 2.4GHz bands are 1 through 11 while the 5GHz bands are three digit band numbers. That is almost certainly the reason your other devices cannot connect because it is a pretty safe bet they are only capable of the 2.4GHz band and it is likely they are 802.11b/g as well.
Artie is doing a good job of walking you through getting the information from the Time Capsule, so I will butt out for now and will just follow the thread. I am very curious why you cannot connect to and configure the Time Capsule through your wireless connection.