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Installation
ASMi-450 Installation and Operation Manual 2-7
Note
User-selected parameter values are not erased by setting one or more switch
sections to ON: this action merely causes the ASMi-450 to use the default
values. However, if the ASMi-450 is turned off and then powered up again, the
default values replace the user values.
Jumper R/C
The jumper designated R/C, is used to select the function of the ASMi-450 unit:
C The ASMi-450 unit operates as a central unit (LTU).
R The ASMi-450 unit operates as a remote unit (NTU).
The ASMi-450 shipped with the jumper set at C.
Jumper FGND/GND
The jumper FGND/GND controls the connection between the ASMi-450 signal
ground and the frame (chassis) ground.
YES Signal ground is connected to the frame (chassis) ground.
NO Signal ground is not connected to the frame ground.
The ASMi-450 is shipped with the jumper set at YES (connected).
Setting the jumper to NO may invalidate the safety of connection to
telecommunication networks in certain locations, where permanent excessive
voltages are present on the lines.
Internal Settings
Procedure
Refer to figure 2-2, and identify jumper and switch locations and settings.
Change settings as required.
Reinstalling
ASMi-450 Cover
After completing the internal settings, reinstall the top cover as follows:
• Position the lower half of the ASMi-450 case on a flat, clean surface.
• Check that the decorative black plastic strips on the sides on the unit are still
in place (if not, place the strips in the grooves on the sides of the lower
half).
• Identify the front and rear of the top cover, and position the cover on the
lower half of the ASMi-450, so that the cover guides are located just above
the holes in the lower half. Close the cover and ensure that the protruding
tips of the cover guides enter the corresponding recesses in the lower half.
• Hold the cover in place, and turn the assembly over, to gain access to the
bottom of the unit.
• Insert the original cover screws in their positions and tighten carefully. Do
not use excessive torque.