Compaq AlphaServer ES45 1B Owner's Manual page 219

Syntax
set com1_mode value
value Defined values are:
through All data passes through RMC and is filtered for the RMC escape se-
quence. This is the default.
snoop Data partially bypasses RMC, but RMC taps into the data lines and
listens passively for the RMC escape sequence.
soft_bypass Data bypasses RMC, but RMC switches automatically into snoop mode
if loss of carrier occurs.
firm_bypass Data bypasses RMC. RMC remote management features are disabled.
local Changes the focus of the COM1 traffic to the local RMC COM1 port if
RMC is currently in one of the bypass modes or if RMC is in through
mode with an active remote session.
Example
P00>>> set com1_mode snoop
Firmware 5-55