TRB500 modem issues - battled with it for months, never got Elisa nor DNA connections stable.
Had enough and changed to RUTC50 with different modem (RG520).
Good luck. 
TRB500 modem issues - battled with it for months, never got Elisa nor DNA connections stable.
Had enough and changed to RUTC50 with different modem (RG520).
Good luck.