Jumpers and Switches B-3
Table B–1 RMC/SPC Jumper Settings
Jumper Description
J24 1–2: Disables RMC flash update
2–3: Enables RMC flash update (default)
Disabling RMC flash update prevents other operators from erasing
or updating the RMC.
J25 1–2: Sets RMC back to defaults
2–3: Normal RMC operating mode (default)
If the RMC escape sequence is set to something other than the
default, and you have forgotten the sequence, RMC must be reset to
factory settings to restore the default escape sequence. See Chapter
8 for the reset procedure.
J26 1–2: Causes system to shut down if over-temperature limit is
reached (default)
2–3: Permits system to continue running at over-temperature.
J31 1–2: Disables COM1 bypass
2–3: Allows RMC to control COM1 bypass (default)
No jumper installed: Forces COM1 bypass
If a high-speed modem is connected to COM1 (MMJ), removing J31
prevents RMC from receiving characters that might cause
interference.
J1 Not installed (default). When installed, bypasses power-up checks of
processors by system power controller.
J2 Reserved (not installed).
J3 Reserved (not installed).
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