The Multitech Conduit has been running solidly for quite some time in the middle of downtown. We decided to pull it out of service for upgrades. In place, we put our RAK gateway, which is working fine.
Upgraded the Multitech to:
Firmware Information1.4.3 2017-06-05T08:53:23
Reinstalled the TTN gateway as per https://www.thethingsnetwork.org/docs/gateways/multitech/aep.html
When the weather gets better (spring), we will work to move this gateway to a permanent installation with the antenna mounted in an external location.