Comtech EF Data SDM-309B - Manual (Page 119)

M&C and Interfaces SDM-309B Satellite Modem
4-4–42 MN/U-SDM309B Rev. #
Table 4-3
Switch 1
Switch Position
-1- -2- -3- -4-
UNBALANCED DDI CLOSED CLOSED OPEN OPEN
BALANCED DDI OPEN OPEN CLOSED CLOSED
Switch Position
-5- -6- -7- -8-
UNBALANCED DDO CLOSED CLOSED OPEN OPEN
BALANCED DDO OPEN OPEN CLOSED CLOSED
Switch 2
Switch Position
-1- -2- -3- -4-
UNBALANCED IDI CLOSED CLOSED OPEN OPEN
BALANCED IDI OPEN OPEN CLOSED CLOSED
Switch Position
-5- -6- -7- -8-
UNBALANCED IDO CLOSED CLOSED OPEN OPEN
BALANCED IDO OPEN OPEN CLOSED CLOSED
Switch 3
Switch Position
-1- -2- -3- -4-
UNBALANCED EXC CLOSED OPEN CLOSED OPEN
BALANCED EXC OPEN CLOSED OPEN CLOSED
Switch 4
Drop Data Output/Insert Input
LOOPBACK SWITCH POSITION - UP
NORMAL SWITCH POSITION - DOWN
Switch 5
Drop Data Output Dce/Dte Select
DCE SWITCH POSITION - UP
DTE SWITCH POSITION - DOWN