I am setting up a demo unit of the BCM50 and a GATM4 so we can demo 7 analog trunks for some potential clients. I had a RJ21 Telephony cable special ordered to interface with the GATM4 and our telco block but can only get 2 of the lines to give dial tone on the BCM50. I am using the blue, green, orange and brown pairs from the 50 pin cable. Does anyone know if those are the correct pairs to use? The 2 pairs that I know work are blue and orange(lines 65 & 66). Lines 67 & 68 appear but as I said no dial tone. Thanks for the help.