I think you have hit a nail on the head. From what I can glean on the www, the TC can only join an existing wifi network via an existing Apple device such an 'Extreme', in other words it will not connect directly to an existing wifi network created by a 3rd party device (such as my BT Homehub). Oh well.
Last edited by yellowtriumph; 23rd March 2016 at 21:41.