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Strapping the V.24 DIM Site Daughtercard
On the surface of the V.24 DIM Site daughtercard, there are 8 DIP switches and
two straps. The DIP switches are set at the factory for the particular DIM that is
installed on the daughtercard. The two straps are used only when the V.24 DIM is
installed.
The strapping on the V.24 DIM daughtercard typically comes configured from the
factory in Ring Indicator mode, which causes pin 22 on the DB25 connector to
indicate the presence of an incoming call to the attached DTE. Otherwise, the
strap is set to Test Mode (see Figures 2-11 and 2-12).
Follow these steps:
Step
Action
1
Set the strapping as sho wn in Figures 2-11 and 2-12 for the following:
Pin 22:
Normally.defined as Ring Indicator, an output for a DCE device.
However, you can configure it as an input and use it in Test Mode when
the port is configured to connect to a dial modem. Pin 22 can only be
configured as an output when the DIM is in the DCE position. If the
DIM is in the DTE position, pin 22 is always an input.
Pin 25:
Normally defined as Test Mode, an output for a DCE device. However,
you can configure it as an input (Make Busy). Pin 25 can only be
configured as an output when the DIM is in the DTE position. If the
DIM is in the DCE position, pin 25 is always an input.
2
Push the strap down onto the pins.
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