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Introduction
1-2
Figure 1-1. The 9C300-1 Environmental Module
Features
System Cooling
The 9C300-1 Environmental Module houses the cooling fan subsystem. There are
four, high-air flow fans in the assembly to provide necessary chassis cooling. Any
one of these can fail without adversely affecting system operation. The fans’
operation and speed are continuously monitored, allowing network technicians
to be quickly notified if repairs are needed. Control of the fans’ operating speed is
also provided for maximum cooling efficiency and fan life. The fans are protected
from controller failure by a fail-safe circuit. In the event of a controller
malfunction, this circuit forces the fan subsystem to maximum speed and notifies
Network Management.
Out-of-Band Management
Out-of-band management refers to managing the MMAC-Plus via a Local
Management (LM) connection or an SNMP-based management application which
does not use the same network connection to the chassis as “user data.”
Four Out-of-band management interfaces are built into the 9C300-1
Environmental Module. One channel is the 4x40 character backlit LCD and
associated five button keypad. This interface provides a network manager or
technician with the capability to review system status, performance and
configuration information. Two interfaces are serial RS-232 ports. These ports
support local management via a VT100 session, SLIP, or PPP, or monitor an
American Power Conversion Smart UPS.
The remaining out-of-band management interface supports any standard
Cabletron Ethernet Port Interface Module (EPIM). This interface provides a direct
connection to the internal System Management Bus-10 (SMB-10).
123
9C300-1
STATUS
ALARM
COM 1
COM 2
EPIM
ENTER
4 5 6 7 8 9 10 11 12 13 14
MMAC