3
DUMB
Next to the RS-232-C connector is a two pin header. When the pins of this connector are
MODE
not connected (default), the modem operates in smart mode. When they are connected, the
modem operates in dumb mode. For more detail, please refer to the dumb mode section of
this manual.
POWER
This connector is present on all stand alone models and accepts a 9VAC or 9 –14VDC power
source. On rack mount versions, a different power connector is used and it provides DC
voltages to the modem from the rack back plane.
CAUTION:
Several DC power options are
available for special applications. Modems equipped with special power options will contain
specifications that supersede the power specifications of this paragraph.
DB-25
RJ-11
POSITIVE Voltage
NEGATIVE Voltage
DB-25
RJ-11
POSITIVE Voltage
NEGATIVE Voltage
FRAME GROUND