6 Replies Latest reply on Sep 9, 2014 2:16 PM by neilski

    What does a steady green "RDN" indicator light mean?

    neilski New Member

      Hello.  I have been using Adtran FSU Frame Relay Service Units for many years to connect a Multitech DSU to two 8-Channel Multiplech Multiplexers on a leased 56K line. A few times a day the system will go down with the only indicator light being that the "RDN" indicator light on the FSU will show steady green.  The manual is not helpful.  I have tried swapping out units on the remote side with the same result.  I even switched data lines.  Tried other cables.  Only thing I haven't tried is swapping out units on the Host side.  By the time I get to the Host location the conditions goes back to normal.  Thanks for any suggestions.  Neil