Genesys suggested that we make the following changes on the Tserver, and after doing so, the Tservers came online within minutes of the restart.
1. Increase the value of 'use-link-bandwidth' to 200. This will allow TServer to send more requests per second.. With a current AES, 200 should still be quite conservative.
2. If you don't already have a section called 'gctm' in your TServer options, add it, and in it, add an option called 'link-register-timeout' with a value of '60000'. This will double the amount of time TServer will wait (60 seconds instead of 30)