You could probably setup a system to get incoming calls using something like Goo...

tlrobinson on Aug 1, 2010 | parent | context | favorite | on: Hacker Spoofs Cell Phone Tower to Intercept Calls

You could probably setup a system to get incoming calls using something like Google Voice. Get a phone number for a VoIP account, forward GV to it and your real cell phone number, and set up your tower to route VoIP to your handset when it's connected.