Thanks for that information.  I checked it.  both are set at 0.  now what?

been there done that

Yes I have read the confusing and very unclear manual that does not address  how to check the handset and how to set command station jumpers to the same channel.  And I am not sure that is even the problem. Can anyone offer any advise?

I bought Dynamis in 2007,  just started to use it this week,  worked okay for couple hours, now does not seem to communicate from handset to command station, instructions say check jumpers, how do you do that?  Command station has 2 lights constantly flashing, what could be the problem?