Does anyone know what is used to program a Telrad Key BX 408 system? I have a DSS console for the 816 and works just fine - but does not work at all with the 408. The port is good (a telephone works on sta 21) One thing I noticed is that the programming overlay's that are on site indicate that there are 3 rows of buttons - two vertical rows and one horizontal row. My DSS has a number on the cicuit board of 83-021-2070 it has the woodgrain faceplate and 2 rows of horizontal keys. Any info will help. Thanks