I have a ConnectPort X4 IA out in the field that is failing to communicate with an xbee radio. The gateway's web ui says that the xbee's settings are unavailable. I ssh'ed into the gateway and tried a "display xbee address=<mac>" and got back "Transmit error (-89)".
What is that error, exactly? My search hasn't found any specific error codes. Knowing may not help, but can't hurt.