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Jumper Option Selection
Modem configuration is controlled by front panel pushbuttons and the
LCD, AT or V.25 bis commands, and one hardware option jumper located
on the PC board. Normally, jumpers do not have to be changed. If a
change is required, remove the modem cover. The jumper diagrams on the
following pages indicate the factory settings.
Removing the Cover
Warning
Disconnect power before removing the cover. Although
dangerous voltage levels are not exposed, disconnecting
power ensures an electrical shock hazard is not present.
1) Place the unit on its side on a flat surface.
2) To disengage the cover's locks from the the base of the modem,
insert a medium size flat screwdriver blade in one of the slots as
illustrated in Figure C-1. DO NOT PUSH the screwdriver, but pry
the lock open by applying pressure toward the unit.
3) Assist removal by pushing the cover from the base.
4) Repeat this procedure with the remaining three slots.
Hardware Options
Modem 3600
Appendix C
C-1
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