If still on the Smartnode firmware revision, use the Patton ISDN T1 instead of the Trinity specific model.

  * The smartnode needs to be on the same subnet as the 3CX server
  * On a SN4970 factory reset is done by holding reset button for 5 seconds only, any longer will not reset the device.
  * The smartnode detector didn't work for me, I had to check DHCP logs to find the IP of the smartnode after factory reset
  * Web logging into webUI, create new admin account and password then write/save config, otherwise it will not be saved after a reboot
  * Add the Patton device in 3CX, then download the device config and upload it to the Patton device and commit/save/reboot.
  * When connecting to an Adtran or similar, a crossover cable is needed between the Adtran and Patton device.
  * The 3CX generated config worked for a Comcast PRI without modification.