Remote Management Console 4-5
Snoop Mode (Default Mode)
In snoop mode data partially bypasses the RMC. The data and control signals
are routed from the system COM1 port to the external modem port, but the
RMC taps into the data lines and listens passively for the RMC escape
sequence. If it detects the escape sequence, it enters RMC mode.
The escape sequence is also delivered to the system on the bypassed data lines.
If you decide to change the default escape sequence, be sure to choose a unique
sequence so that the system software does not interpret characters intended for
the RMC.
Because snoop mode does not filter every piece of data, it is useful when you
want to monitor the system but also ensure optimum COM1 performance.
Bypass Modes
In bypass modes, note that the internal system COM1 port is connected directly
to the modem port. The RMC passively listens to the escape sequence from the
external COM1 port, when the RMC escape sequence is captured.
Soft Bypass Mode
In soft bypass mode all data and control signals are routed directly from the
system COM1 port to the external modem port, and the RMC does not listen to
traffic on the COM1 data lines. If an alert condition or loss of carrier occurs,
however, the RMC detects it and switches automatically into snoop mode. In
soft bypass mode, the RMC also initializes the modem for dialing in and dials
out when an alert is detected.
Soft bypass mode is useful if management applications need the COM1 channel
to perform a binary download, because it ensures that RMC does not
accidentally interpret some binary data as the escape sequence.
Firm Bypass Mode
Firm bypass mode effectively disables the RMC. All data and control signals
are routed directly from the system COM1 port to the external modem port. In
firm bypass mode, the RMC dial-in and call-out features are disabled. Firm
bypass mode is useful if you want the system, or an application (such as Insight
Manager or ServerWorks)—not the RMC—to fully control the modem port and
you want to disable RMC features.
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