does anyone know if there is any manuals on adjusting the gaping on the old 200 series KTU's? I need to know what the relays are suppose to be set at as my 212 KTU works fine, except for the "R" relay on the 3rd line. when called, the relay does not activate unless called from another line in the house. all the lines on the 212 are connected to land lines through Centurylink. why the first 2 work fine and the 3rd one doesn't I don't understand. the unit was NOS and is considered brand new. so, I'm thinking the relay gaping is the problem... I just need to know what they are suppose to be set at...